STA323W 2.1 channel high-efficiency digital audio system Datasheet - production data Individual channel volume and EQ bypass DDX(R) POP free operation Bass/treble tone control Dual independent programmable limiters/compressors AutoModesTM settings for: - 32 preset EQ curves - 15 preset crossover settings - Auto volume controlled loudness - 3 preset volume curves - 2 preset anti-clipping modes - Preset night-time listening mode - Preset TV AGC PowerSO-36 (slug down) Features Input and output channel mapping Wide supply voltage range (10 V - 36 V) AM noise-reduction and PWM frequency shifting modes Three power output configurations - 2 x 10 W + 1 x 20 W - 2 x 20 W - 1 x 40 W Soft volume update and muting Thermal protection Auto zero detect and invalid input detect muting selectable DDX(R) ternary or binary PWM output plus variable PWM speeds Under-voltage protection Selectable de-emphasis Short-circuit protection Post-EQ user programmable mix with default 2.1 bass-management settings PowerSO-36 slug down package Variable max power correction for lower full-power THD 2.1 channels of 24-bit DDX(R) 100-dB SNR and dynamic range Four output routing configurations 32 kHz to 192 kHz input sample rates Digital gain/attenuation +48 dB to -80 dB in 0.5-dB steps Four 28-bit user programmable biquads (EQ) per channel Selectable clock input ratio 96 kHz internal processing sample rate, 24 to 28-bit precision Video application supports 576 * fs input mode IC control Table 1. Device summary 2-channel IS input data interface Individual channel and master gain/attenuation Individual channel and master soft and hard mute February 2014 This is information on a product in full production. Order code Package STA323W13TR PowerSO-36 in tape & reel DocID11535 Rev 7 1/78 www.st.com Contents STA323W Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.1 EQ processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 1.2 Output options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3 Pin out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4 5 6 7 3.1 Pin numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 General interface specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.2 DC electrical specifications (3.3 V buffers) . . . . . . . . . . . . . . . . . . . . . . . . 18 4.3 Power electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.4 Timing specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.5 Power supply and control sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.1 Output power against supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.2 Audio performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.2.1 Stereo mode, operation with VCC = 26 V, 8 load . . . . . . . . . . . . . . . . 23 5.2.2 Stereo mode, operation with VCC = 18.5 V . . . . . . . . . . . . . . . . . . . . . . 24 5.2.3 Half-bridge binary mode, operation with Vcc = 18.5 V . . . . . . . . . . . . . . 28 IC bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.1 Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.2 Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.3 Write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.4 Read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Register descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 7.1 Configuration register A (address 0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.1.1 2/78 Master clock select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 DocID11535 Rev 7 STA323W Contents 7.2 7.3 7.4 7.5 7.6 7.1.2 Interpolation ratio select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 7.1.3 Thermal warning recovery bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.1.4 Thermal warning adjustment bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.1.5 Fault detect recovery bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Configuration register B (address 0x01) . . . . . . . . . . . . . . . . . . . . . . . . . . 40 7.2.1 Serial audio input interface format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 7.2.2 Serial data interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 7.2.3 Delay serial clock enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Configuration register C (address 0x02) . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.3.1 DDX(R) power-output mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.3.2 DDX(R) variable compensating pulse size . . . . . . . . . . . . . . . . . . . . . . . . 43 Configuration register D (address 0x03) . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.4.1 High-pass filter bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.4.2 De-emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.4.3 DSP bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 7.4.4 Post-scale link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.4.5 Biquad coefficient link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.4.6 Dynamic range compression/anti-clipping bit . . . . . . . . . . . . . . . . . . . . 45 7.4.7 Zero-detect mute enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Configuration register E (address 0x04) . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.5.1 Max power correction variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.5.2 Max power correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.5.3 AM mode enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.5.4 PWM speed mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 7.5.5 Zero-crossing volume enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 7.5.6 Soft volume update enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Configuration register F (address 0x05) . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.6.1 7.7 7.8 Output configuration selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Volume control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 7.7.1 Master controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 7.7.2 Channel controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 7.7.3 Volume description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 AutoModesTM registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 7.8.1 AutoModesTM EQ, volume, GC (address 0x0B) . . . . . . . . . . . . . . . . . . 52 7.8.2 AutoModesTM AM/pre-scale/bass management scale (address 0x0C) . 53 7.8.3 Preset EQ settings (address 0x0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 DocID11535 Rev 7 3/78 78 Contents STA323W 7.9 8 4/78 Channel configuration registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 7.9.1 Channel 1 configuration (address 0x0E) . . . . . . . . . . . . . . . . . . . . . . . . 55 7.9.2 Channel 2 configuration (address 0x0F) . . . . . . . . . . . . . . . . . . . . . . . . 55 7.9.3 Channel 3 configuration (address 0x10) . . . . . . . . . . . . . . . . . . . . . . . . 56 7.10 Tone control (address 0x11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 7.11 Dynamics control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 7.11.1 Limiter 1 attack/release threshold (address 0x12) . . . . . . . . . . . . . . . . . 57 7.11.2 Limiter 1 attack/release threshold (address 0x13) . . . . . . . . . . . . . . . . . 57 7.11.3 Limiter 2 attack/release rate (address 0x14) . . . . . . . . . . . . . . . . . . . . . 57 7.11.4 Limiter 2 attack/release threshold (address 0x15) . . . . . . . . . . . . . . . . . 58 7.11.5 Dynamics control description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 7.11.6 Anti-clipping mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 7.11.7 Dynamic range compression mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 User-programmable settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 8.1 EQ - biquad equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 8.2 Pre-scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 8.3 Post-scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 8.4 Mix/bass management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 8.5 Calculating 24-bit signed fractional numbers from a dB value . . . . . . . . . 65 8.6 User defined coefficient RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 8.6.1 Coefficient address register 1 (address 0x16) . . . . . . . . . . . . . . . . . . . . 65 8.6.2 Coefficient b1data register bits 23:16 (address 0x17) . . . . . . . . . . . . . . 65 8.6.3 Coefficient b1data register bits 15:8 (address 0x18) . . . . . . . . . . . . . . . 65 8.6.4 Coefficient b1data register bits 7:0 (address 0x19) . . . . . . . . . . . . . . . . 65 8.6.5 Coefficient b2 data register bits 23:16 (address 0x1A) . . . . . . . . . . . . . 65 8.6.6 Coefficient b2 data register bits 15:8 (address 0x1B) . . . . . . . . . . . . . . 66 8.6.7 Coefficient b2 data register bits 7:0 (address 0x1C) . . . . . . . . . . . . . . . 66 8.6.8 Coefficient a1 data register bits 23:16 (address 0x1D) . . . . . . . . . . . . . 66 8.6.9 Coefficient a1 data register bits 15:8 (address 0x1E) . . . . . . . . . . . . . . 66 8.6.10 Coefficient a1 data register bits 7:0 (address 0x1F) . . . . . . . . . . . . . . . 66 8.6.11 Coefficient a2 data register bits 23:16 (address 0x20) . . . . . . . . . . . . . 66 8.6.12 Coefficient a2 data register bits 15:8 (address 0x21) . . . . . . . . . . . . . . 66 8.6.13 Coefficient a2 data register bits 7:0 (address 0x22) . . . . . . . . . . . . . . . 67 8.6.14 Coefficient b0 data register bits 23:16 (address 0x23) . . . . . . . . . . . . . 67 8.6.15 Coefficient b0 data register bits 15:8 (address 0x24) . . . . . . . . . . . . . . 67 DocID11535 Rev 7 STA323W Contents 8.7 8.6.16 Coefficient b0 data register bits 7:0 (address 0x25) . . . . . . . . . . . . . . . 67 8.6.17 Coefficient write control register (address 0x26) . . . . . . . . . . . . . . . . . . 67 Reading and writing coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 8.7.1 Reading a coefficient from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 8.7.2 Reading a set of coefficients from RAM . . . . . . . . . . . . . . . . . . . . . . . . . 68 8.7.3 Writing a single coefficient to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 8.7.4 Writing a set of coefficients to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 8.8 Variable max power correction (address 0x27-0x28) . . . . . . . . . . . . . . . . 70 8.9 Fault detect recovery (address 0x2B - 0x2C) . . . . . . . . . . . . . . . . . . . . . . 71 8.10 Status indicator register (address 0x2D) . . . . . . . . . . . . . . . . . . . . . . . . . 71 8.10.1 Thermal warning indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 8.10.2 Fault detect indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 8.10.3 PLL unlock indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 10 Trademarks and other acknowledgements . . . . . . . . . . . . . . . . . . . . . . 76 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 DocID11535 Rev 7 5/78 78 List of tables STA323W List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. Table 28. Table 29. Table 30. Table 31. Table 32. Table 33. Table 34. Table 35. Table 36. Table 37. Table 38. Table 39. Table 40. Table 41. Table 42. Table 43. Table 44. Table 45. Table 46. Table 47. Table 48. 6/78 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Component selection "Table A" - full-bridge operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Component selection "Table B" - binary half-bridge operation . . . . . . . . . . . . . . . . . . . . . . 12 Component selection "Table C" - mono operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Recommended DC operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 General interface electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Power electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Register summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Master clock select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 IR and MCS settings for input sample rate and clock rate . . . . . . . . . . . . . . . . . . . . . . . . . 38 Interpolation ratio select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 IR bit settings as a function of input sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Thermal warning recovery bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Thermal warning adjustment bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Fault detect recovery bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Serial audio input interface format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Supported serial audio input formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Serial input data timing characteristics (fs = 32 to 192 kHz). . . . . . . . . . . . . . . . . . . . . . . . 42 Delay serial clock enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Channel input mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 DDX(R) power-output mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 DDX(R) output modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 DDX(R) compensating pulse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 High-pass filter bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 De-emphasis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 DSP bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Post-scale link. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Biquad coefficient link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Dynamic range compression/anti-clipping bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Zero-detect mute enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Max power correction variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Max power correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 AM mode enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 PWM speed mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 PWM output speed selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Zero-crossing volume enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Soft volume update enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Output configuration selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Output configuration selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Invalid input detect mute enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Binary clock loss detection enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Auto-EAPD on clock loss enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Software power down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 DocID11535 Rev 7 STA323W Table 49. Table 50. Table 51. Table 52. Table 53. Table 54. Table 55. Table 56. Table 57. Table 58. Table 59. Table 60. Table 61. Table 62. Table 63. Table 64. Table 65. Table 66. Table 67. Table 68. Table 69. Table 70. Table 71. Table 72. Table 73. Table 74. Table 75. List of tables External amplifier power down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Master volume offset as a function of MV[7:0] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Channel volume as a function of CxV[7:0] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 AutoModesTM EQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 AutoModesTM volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 AutoModesTM gain compression/limiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 AMPS - AutoModesTM auto pre scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 AutoModesTM AM switching enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 AutoModesTM AM switching frequency selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 AutoModesTM crossover setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Crossover frequency selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Preset EQ selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Channel Limiter Mapping Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Channel PWM output mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Tone control boost/cut selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Limiter attack rate selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Limiter release rate selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Limiter attack - threshold selection (AC-mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Limiter release threshold selection (AC-mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Limiter attack - threshold selection (DRC-mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Limiter release threshold selection (DRC-mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 RAM block for biquads, mixing, and scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Thermal warning indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Fault detect indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 PLL unlock indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 PowerSO-36 slug down dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 DocID11535 Rev 7 7/78 78 List of figures STA323W List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37. Figure 38. Figure 39. Figure 40. Figure 41. Figure 42. Figure 43. Figure 44. Figure 45. Figure 46. Figure 47. Figure 48. 8/78 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Channel signal flow diagram through the digital core . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Channel signal flow diagram through the EQ block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Output power stage configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Schematic for 2 (half-bridge) channels + 1 (full-bridge) channel . . . . . . . . . . . . . . . . . . . . 12 Power schematic for 2 (full-bridge) channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Power schematic for 1 mono parallel channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Package pins (viewed from top of device) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Test circuit 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Test circuit 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Recommended power up and power down sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Stereo mode - output power vs. supply voltage, THD+N = 10% . . . . . . . . . . . . . . . . . . . . 21 Output power vs. supply for stereo bridge, THD+N=1% . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Half-bridge binary mode output power vs. supply, THD+N=10% . . . . . . . . . . . . . . . . . . . 22 Half-bridge binary mode output power vs. supply voltage, THD+N=1% . . . . . . . . . . . . . . 22 Typical efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Typical frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 FFT -60 dB, 1 kHz output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 FFT inter-modulation distortion 19 kHz and 20 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Frequency response, 1 W, BTL, 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Channel separation, 1 W, BTL stereo mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 THD vs. output power, BTL, 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 THD vs. frequency, 1 W output, stereo mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 THD vs. frequency, BTL, 16 W output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 FFT 0 dBFS 1 kHz, 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FFT 0 dBFS 1 kHz, 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FFT 0 dBFS 1 kHz, 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FFT -60 dBFS 1 kHz, 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 FFT -60 dBFS 1 kHz, 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 FFT -60 dBFS 1 kHz, 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 PSRR BTL, 500 mV ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Frequency response, 1 W, binary half-bridge mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Channel separation, 1 W, half bridge binary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 THD+N vs. output power, single ended, 1 kHz, half-bridge binary . . . . . . . . . . . . . . . . . . . 29 THD vs. frequency, single ended, 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 THD vs. frequency, single ended, 8 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 FFT 0 dB, 1 kHz, single ended, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 FFT 0 dB, 1 kHz, single ended, 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 FFT 0 dB, 1 kHz, single ended, 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 FFT -60 dB, single ended, 1 kHz, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 FFT -60 dB, single ended, 1 kHz, 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 FFT -60 dB, single ended, 1 kHz, 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PSRR single ended, 500 mV ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 IC write procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 IC read procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 General serial input and output formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Serial input and data timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Basic limiter and volume flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 DocID11535 Rev 7 STA323W List of figures Figure 49. Figure 50. Figure 51. Biquad filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Mix/bass management block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 PowerSO-36 slug down outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 DocID11535 Rev 7 9/78 78 Description 1 STA323W Description The STA323W is a single-chip audio system comprising digital audio processing, digital amplifier control and a DDX(R) power-output stage. The STA323W uses all-digital amplification to provide high-power, high-quality and high-efficiency. The STA323W power section consists of four independent half-bridges. These can be configured, by digital control, to operate in the following modes. Two channels, provided by two half-bridges, and a single full-bridge giving up to 2 x 10 W + 1 x 20 W of power output. Two channels, provided by two full-bridges, giving up to 2 x 20 W of power. A single, parallel, full-bridge channel capable of high-current operation and giving 1 x 40W output. The STA323W also provides a full set of digital processing features. This includes up to four programmable 28-bit biquads (EQ) per channel, and bass and treble tone control. AutoModesTM enable a time-to-market advantage by substantially reducing the amount of software development needed for specific functions. These includes auto volume loudness, preset volume curves and preset EQ settings. New advanced AM radio-interference reduction modes are also provided. The serial audio data input interface accepts all existing formats, including the IS. Three channels of DDX(R) processing are provided. This high-quality conversion from PCM audio to DDX patented 3-state PWM switching provides over 100 dB of SNR and dynamic range. Figure 1. Block diagram SDA SCL IC System control LRCKI BICKI SDI_12 OUT1A Audio EQ, mix, crossover, volume, limiter processing Serial data input, channel mapping and resampling DDX processing Quad half-bridge power stage OUT1B OUT2A OUT2B TWARN System timing Power down EAPD FAULT Power down CLK Figure 2. Channel signal flow diagram through the digital core IS input 10/78 Channel mapping Re-sampling ED processing Mix Crossover filter DocID11535 Rev 7 Volume limiter 4x Interpol DDX DDX output STA323W 1.1 Description EQ processing Two channels of input data (re-sampled if necessary) at 96 kHz are provided to the EQ processing block. In these blocks, up to four user-defined Biquads can be applied to each of the two channels. Pre-scaling, DC-blocking high-pass, de-emphasis, bass, and tone control filters can also be implemented by means of configuration parameter settings. The entire EQ block can be bypassed for all channels simultaneously by setting the DSPB bit to 1. The CxEQBP bits can also be used to bypass the EQ functionality on a per channel basis. Figure 3 shows the internal signal flow through the EQ block. Figure 3. Channel signal flow diagram through the EQ block Re-sampled input pre-scale High pass filter If HPB= 0 BQ#1 BQ#2 BQ#3 BQ#4 4 biquads User defined if AMEQ = 00 Preset EQ if AMEQ = 01 Auto loudness if AMEQ = 10 Deemphasis Bass filter If DEMP = 1 If CxTCB = 0 BTC: bass boost/cut TTC: treble boost/cut To mix Treble filter If DSPB = 0 and CxEQB = 0 1.2 Output options Figure 4. Output power stage configurations Half bridge OUT1A Channel 1 Half bridge Half bridge 2-channel (full bridge) configuration, register bits OCFG[1:0] = 00 OUT1B OUT2A Channel 2 Half bridge Half bridge Half bridge Half bridge OUT2B OUT1A OUT1B Channel 1 Channel 2 2.1-channel configuration, register bits OCFG[1:0] = 01 OUT2A Channel 3 Half bridge Half bridge Half bridge Half bridge Half bridge OUT2B OUT1A 1-channel mono-parallel configuration, register bits OCFG[1:0] = 11 OUT1B Channel 3 OUT2A The setup register is Configuration register F (address 0x05) on page 48 OUT2B DocID11535 Rev 7 11/78 78 Applications 2 STA323W Applications Table 2. Component selection "Table A" - full-bridge operation Load Inductor Capacitor 4 10 H 1.0 F 6 15 H 470 nF 8 22 H 470 nF Table 3. Component selection "Table B" - binary half-bridge operation Load Inductor Capacitor 4 22 H 680 nF 6 33 H 470 nF 8 47 H 390 nF Table 4. Component selection "Table C" - mono operation Load Inductor Capacitor 2 4.7 H 2.0 F 3 6.8 H 1.0 F 4 10 H 1.0 F Figure 5. Schematic for 2 (half-bridge) channels + 1 (full-bridge) channel VCC_SIGN SUB_GND VSS N.C. VDD OUT2B GND VCC2B BICKI N.C. LRCKI GND2B SDI GND2A VDDA VCC2A GNDA OUT2A XTI OUT1B PLL_FILTER VCC1B RESERVED GND1B SDA GND1A SCL RESET CONFIG VL VDD_REG N.C. VCC1A OUT1A GND_CLEAN GND_REG STA323W 12/78 DocID11535 Rev 7 STA323W Applications Figure 6. Power schematic for 2 (full-bridge) channels VCC_SIGN SUB_GND SUB_GND VSS N.C. VDD OUT2B GND VCC2B BICKI N.C. LRCKI GND2B SDI GND2A VDDA VCC2A GNDA OUT2A XTI OUT1B PLL_FILTER VCC1B RESERVED GND1B SDA GND1A SCL RESET CONFIG VL VDD_REG N.C. VCC1A OUT1A GND_CLEAN GND_REG STA323W Figure 7. Power schematic for 1 mono parallel channel VCC_SIGN SUB_GND VSS N.C. VDD OUT2B GND VCC2B BICKI N.C. LRCKI GND2B SDI GND2A VDDA VCC2A GNDA OUT2A XTI OUT1B PLL_FILTER VCC1B RESERVED GND1B SDA GND1A SCL RESET CONFIG VL VDD_REG N.C. VCC1A OUT1A GND_CLEAN GND_REG STA323W DocID11535 Rev 7 13/78 78 Pin out STA323W 3 Pin out 3.1 Pin numbering Figure 8. Package pins (viewed from top of device) SUB_GND N.C. OUT2B VCC2B N.C. GND2B GND2A VCC2A OUT2A OUT1B VCC1B GND1B GND1A N.C. VCC1A OUT1A GND_CLEAN GND_REG 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 VCC_SIGN VSS VDD GND BICKI LRCKI SDI VDDA GNDA XTI PLL_FILTER RESERVED SDA SCL RESET CONFIG VL VDD_REG Table 5. Pin list 14/78 Pin Type Name 1 I/O SUB_GND 2 N.C. N.C. 3 O OUT2B Output half bridge 2B 4 I/O VCC2B Positive supply 5 N.C. N.C. Not connected 6 I/O GND2B Negative supply 7 I/O GND2A Negative supply 8 I/O VCC2A Positive supply 9 O OUT2A Output half bridge 2A 10 O OUT1B Output half bridge 1B 11 I/O VCC1B Positive supply 12 I/O GND1B Negative supply 13 I/O. GND1A Negative supply 14 N.C. N.C. Not connected 15 I/O VCC1A Positive supply 16 O OUT1A Output half bridge 1A DocID11535 Rev 7 Description Ground Not connected STA323W Pin out Table 5. Pin list (continued) 3.2 Pin Type Name Description 17 I/O GND_CLEAN Reference ground 18 I/O GND_REG Substrate ground 19 I/O VDD_REG Logic supply 20 I/O VL 21 I CONFIG Logic levels 22 I RESET Reset 23 I SCL IC serial clock 24 I/O SDA IC serial data 25 - RESERVED Reserved test pin must be connected to ground 26 I PLL_FILTER Connection to PLL filter 27 I XTI PLL input clock 28 I/O GNDA Analog ground 29 I/O VDDA Analog supply 3.3 30 I SDI_12 IS serial data channels 1 and 2 31 I/O LRCKI IS left/right clock, 32 I BICKI IS serial clock 33 I/O GND Digital ground 34 I/O VDD Digital supply 3.3 V 35 I/O VSS 5 V regulator referred to Vcc 36 I/O VCC_SIGN Logic supply to power section 5 V regulator referred to ground Pin description OUT1A, 1B, 2A and 2B (pins 16, 10, 9 and 3) The half-bridge PWM outputs 1A, 1B, 2A and 2B provide the inputs signals to the speakers. RESET (pin 22) Driving RESET low sets all outputs low and returns all register settings to their default (reset) values. The reset is asynchronous to the internal clock. SDA, SCL (pins 24, 23) The SDA (IC Data) and SCL (IC Clock) pins operate according to the IC specification (See Chapter 6 on page 33.) Fast-mode (400 kB/s) IC communication is supported. VDDA, GNDA (pins 29,28) The phase locked loop power is applied here. This +3.3V supply must be well decoupled and filtered for good noise immunity since the audio performance of the device depends upon the PLL circuit. DocID11535 Rev 7 15/78 78 Pin out STA323W CLK (pin 27) This is the master clock input used by the digital core. The master clock must be an integer multiple of the LR clock frequency. Typically, the master clock frequency is 12.288 MHz (256 * fs) for a 48kHz sample rate; it is the default setting at power-up. Care must be taken to provide the device with the nominal system clock frequency; over-clocking the device may result in anomalous operation, such as inability to communicate. PLL_FILTER (pin 26) This is the connection for the external filter components for the PLL loop compensation. Refer to the schematic diagram Figure 7: Power schematic for 1 mono parallel channel on page 13 for the recommended circuit. BICKI (pin 32) The serial or bit clock input is for framing each data bit. The bit clock frequency is typically 64 * fs using IS serial format. SDI (pin 30) This is the serial data input where PCM audio information enters the device. Six format choices are available including IS, left or right justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits. LRCKI (pin 31) The left/right clock input is for data word framing. The clock frequency is at the input sample rate, fs. 16/78 DocID11535 Rev 7 STA323W 4 Electrical specifications Electrical specifications Table 6. Absolute maximum ratings Symbol Parameter Value Unit VDD_3.3 3.3 V I/O power supply -0.5 to 4 V Vi Voltage on input pins -0.5 to (VDD+0.5) V Vo Voltage on output pins -0.5 to (VDD+0.5) V Tstg Storage temperature -40 to +150 C Tamb Ambient operating temperature -40 to +85 C VCC DC supply voltage 40 V VMAX Maximum voltage on pin 20 5.5 V Table 7. Thermal data Symbol Parameter Min Typ Max Unit C/W Rthj-case Thermal resistance junction to case (thermal pad) Tj-SD Thermal shut-down junction temperature 150 C TWARN Thermal warning temperature 130 C Th-SD Thermal shut-down hysteresis 25 C 2.5 Table 8. Recommended DC operating conditions Symbol 4.1 Parameter Value Unit VDD_3.3 I/O power supply 3.0 to 3.6 V Tj Operating junction temperature -40 to +125 C General interface specifications Operating conditions VDD33 = 3.3 V 0.3 V, Tamb = 25 C unless otherwise specified. Table 9. General interface electrical characteristics Symbol Parameter Test Condition Min. Typ. Max. Unit Iil Leakage current: low level input, no pull-up Vi = 0 V (1) 1 A Iih Leakage current: high level input, no pull-down Vi = VDD33 (1) 2 A IOZ Leakage current: 3-state output without pull-up/down Vi = VDD33 (1) 2 A Vesd Electrostatic protection (human body model) Leakage < 1A 2000 V 1. The leakage currents are generally very small < 1 nA. The values given here are maximum after an electrostatic stress on the pin. DocID11535 Rev 7 17/78 78 Electrical specifications 4.2 STA323W DC electrical specifications (3.3 V buffers) Operating conditions VDD33 = 3.3 V 0.3 V, Tamb = 25 C unless otherwise specified Table 10. DC electrical characteristics Symbol 4.3 Parameter Test condition Min. Typ. Max. Unit VIL Low level Input voltage VIH High level Input voltage 2.0 V Vhyst Schmitt trigger hysteresis 0.4 V Vol Low level output IoI = 2mA Voh High level output Ioh = -2mA 0.8 0.15 VDD 0.15 V V V Power electrical specifications Operating conditions VDD33 = 3.3 V 0.3 V, VL = 3.3 V, VCC = 30 V, Tamb = 25 C unless otherwise specified. Table 11. Power electrical characteristics Symbol Test conditions Min. Typ. Max. Unit RdsON Power Pchannel/Nchannel MOSFET RdsON Id = 1 A Idss Power Pchannel/Nchannel leakage Idss Vcc = 35 V gN Power Pchannel RdsON matching Id = 1 A 95 % gP Power Nchannel RdsON matching Id = 1 A 95 % Dt_s Low current dead time (static) See test circuits , Figure 9 and Figure 10 td ON Turn-on delay time td OFF 200 m 50 A ns Resistive load 100 ns Turn-off delay time Resistive load 100 ns tr Rise time Resistive load, Figure 9 and Figure 10 25 ns tf Fall time Resistive load, Figure 9 and Figure 10 25 ns VCC Supply voltage 36 V VL Low logical state voltage VL = 3.3 V VH High logical state voltage VL = 3.3 V 1.7 V IVCC- Supply current from Vcc in PWRDN PWRDN = 0 3 mA Supply current from Vcc in 3state VCC = 30 V, 3-state IVCC-hiz 10 270 20 PWRDN 18/78 Parameter 8 DocID11535 Rev 7 0.8 V 22 mA STA323W Electrical specifications Table 11. Power electrical characteristics (continued) Symbol 4.4 Parameter Test conditions Min. Typ. Input pulse width = 50% duty, switching frequency = 384 kHz, no LC filters; Max. Unit IVCC Supply current from VCC in operation (both channel switching) Iout-sh Overcurrent protection threshold (short circuit current limit) VUV Under voltage protection threshold tpw-min Output minimum pulse width No Load Po Output power THD = 10%, RL = 8 , VCC = 18 V 20 W Po Output power THD = 1%, RL = 8 , VCC = 18 V 16 W 4 80 mA 6 A 7 V 70 150 ns Timing specifications Table 12. Timing characteristics Symbol Parameter Test condition Min. tRESET Hold time for RESET (pin 22) Active low rest 100 fVCO VCO free run frequency No clock applied to XTI 18 Typ. Max. Unit ns 28 MHz Figure 9. Test circuit 1 OUTxY Vcc (3/4)Vcc Low current dead time = MAX(DTr, DTf) (1/2)Vcc (1/4)Vcc +Vcc t DTr Duty cycle = 50% M58 OUTxY INxY M57 DTf R8 + - V67 vdc = Vcc/2 gnd DocID11535 Rev 7 19/78 78 Electrical specifications STA323W Figure 10. Test circuit 2 High Current Dead time for Bridge application = ABS(DTout(A)-DTin(A))+ABS(DTOUT(B)-DTin(B)) +VCC Duty cycle=A Duty cycle=B DTout(A) M58 DTin(A) Q1 Q2 OUTA INA Iout=1.5A M57 Q3 DTout(B) Rload=4 L67 10 C69 470nF L68 10 C71 470nF C70 470nF DTin(B) OUTB INB Iout=1.5A Q4 Duty cycle A and B: Fixed to have DC output current of 4A in the direction shown in figure 4.5 M64 M63 D06AU1651 Power supply and control sequencing Figure 11 shows the recommended power-up and power-down sequencing. The "time zero" reference point is taken where VCC crosses the under voltage lockout threshold. Figure 11. Recommended power up and power down sequence 20/78 DocID11535 Rev 7 STA323W Electrical characteristics curves 5 Electrical characteristics curves 5.1 Output power against supply voltage Figure 12. Stereo mode - output power vs. supply voltage, THD+N = 10% Output power (W) 80 70 60 50 6ohm 4ohm 40 8ohm 30 20 10 10 12 14 16 18 20 22 24 26 Power Supply Voltage (VDC) Figure 12 shows the full-scale output power (0 dBFS digital input with unity amplifier gain) as a function of power supply voltage for 4, 6, and 8 loads in either DDX(R) mode or binary full bridge mode. Output power is constrained for higher impedance loads by the maximum voltage limit of the STA323W and by the over-current protection limit for lower impedance loads. The minimum threshold for the over-current protection circuit of the STA323W is 4 A (at 25 C) but the typical threshold is 6 A for the device. The solid curves shows the typical output power capability of the device. The dotted curves shows the output power capability constrained to the minimum current specification of the STA323W. The output power curves assume proper thermal management of the power device's internal dissipation. Figure 13. Output power vs. supply for stereo bridge, THD+N=1% output power (W) - BTL 1% THD 60 6 ohm 50 4 ohm 40 8 ohm 30 16ohm 20 10 0 10 15 20 25 30 supply voltage (V) DocID11535 Rev 7 21/78 78 Electrical characteristics curves STA323W Figure 13 shows the mono mode output power as a function of power supply voltages for loads of 4, 6, 8 and 16 . The same current limits as those given for Figure 12 apply, except output current is 8 A minimum, with 12 A typical in the mono-bridge configuration. The solid curves show typical performance and dashed curves depict the minimum current limit. The output power curves assume proper thermal management of the power device internal dissipation. Figure 14. Half-bridge binary mode output power vs. supply, THD+N=10% 25 Output power (W) Curves measured at f = 1 kHz and using a blocking capacitor of 330 F 20 15 6ohm 4ohm 10 8ohm 5 0 10 12 14 16 18 20 22 2 26 Power Supply Voltage (VDC) Figure 14 shows the output power as a function of power supply voltages for loads of 4, 6, and 8 when the STA323W is operated in a half-bridge binary mode. The curves depict typical performance. Minimum current limit is not reached for these combinations of voltage and load impedance. The output power curves assume proper thermal management of the power device internal dissipation. Figure 15. Half-bridge binary mode output power vs. supply voltage, THD+N=1% output power (W) 25 3 ohm 2 ohm 20 4 ohm 15 8 ohm 10 5 0 10 15 20 supply voltage (V) 22/78 DocID11535 Rev 7 25 30 Curves measured at f = 1 kHz and using a blocking capacitor of 330 F STA323W Electrical characteristics curves 5.2 Audio performance 5.2.1 Stereo mode, operation with VCC = 26 V, 8 load Figure 16. Typical efficiency 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 Total Output Power (Watts) Figure 17. Typical frequency response Figure 18. FFT -60 dB, 1 kHz output DocID11535 Rev 7 23/78 78 Electrical characteristics curves STA323W Figure 19. FFT inter-modulation distortion 19 kHz and 20 kHz 5.2.2 Stereo mode, operation with VCC = 18.5 V Figure 20. Frequency response, 1 W, BTL, 8 dBr A +3 +2.5 +2 +1.5 +1 +0.5 8ohm +0 6ohm -0.5 4 ohm -1 -1.5 -2 -2.5 -3 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 21. Channel separation, 1 W, BTL stereo mode dBr A +10 +0 -10 -20 -30 -40 -50 -60 8ohm -70 -80 4ohm -90 -100 20 50 100 200 500 Hz 24/78 DocID11535 Rev 7 1k 2k 5k 10k 20k STA323W Electrical characteristics curves Figure 22. THD vs. output power, BTL, 1 kHz % 10 5 2 8ohm 6ohm 1 0.5 0.2 4ohm 0.1 0.05 0.02 0.01 100m 200m 500m 1 2 W 5 10 20 50 Figure 23. THD vs. frequency, 1 W output, stereo mode % 1 0.5 0.2 0.1 0.05 4ohm 6ohm 8ohm 0.02 0.01 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Figure 24. THD vs. frequency, BTL, 16 W output 1 % 0.5 0.2 0.1 8ohm 0.05 4ohm 6ohm 0.02 0.01 20 50 100 200 500 1k 2k 5k 10k 20k Hz DocID11535 Rev 7 25/78 78 Electrical characteristics curves STA323W Figure 25. FFT 0 dBFS 1 kHz, 8 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 26. FFT 0 dBFS 1 kHz, 6 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 27. FFT 0 dBFS 1 kHz, 4 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 20 50 100 200 500 Hz 26/78 DocID11535 Rev 7 1k 2k 5k 10k 20k STA323W Electrical characteristics curves Figure 28. FFT -60 dBFS 1 kHz, 8 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 -160 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 29. FFT -60 dBFS 1 kHz, 6 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 -160 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 30. FFT -60 dBFS 1 kHz, 4 dBr +40 +20 +0 -20 -40 -60 -80 -100 -120 -140 -160 20 50 100 200 500 1k 2k 5k 10k 20k Hz DocID11535 Rev 7 27/78 78 Electrical characteristics curves STA323W Figure 31. PSRR BTL, 500 mV ripple dBr +10 T T +0 -10 -20 -30 -40 -50 8 ohm 6ohm -60 4 ohm -70 -80 -90 -100 20 30 40 50 60 70 80 90 100 200 Hz 5.2.3 Half-bridge binary mode, operation with Vcc = 18.5 V Figure 32. Frequency response, 1 W, binary half-bridge mode dBr A +3 +2.5 +2 +1.5 +1 +0.5 +0 3ohm -0.5 -1 -1.5 4ohm -2 -2.5 2ohm -3 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 33. Channel separation, 1 W, half bridge binary dBr A +10 +0 -10 -20 -30 -40 -50 8ohm -60 4 ohm -70 -80 -90 -100 20 50 100 200 500 Hz 28/78 DocID11535 Rev 7 1k 2k 5k 10k 20k STA323W Electrical characteristics curves Figure 34. THD+N vs. output power, single ended, 1 kHz, half-bridge binary % 10 5 2 ohm 2 4ohm 3 ohm 1 0.5 0.2 0.1 0.05 0.02 0.01 100m 200m 500m 1 2 5 10 20 50 W Figure 35. THD vs. frequency, single ended, 1 W % 0.5 0.4 0.3 0.2 2ohm 3ohm 4ohm 0.1 0.08 0.06 0.05 0.04 0.03 0.02 0.01 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 36. THD vs. frequency, single ended, 8 W 5 % 2 1 2ohm 0.5 3ohm 4ohm 0.2 0.1 0.05 0.02 0.01 20 50 100 200 500 1k 2k 5k 10k 20k Hz DocID11535 Rev 7 29/78 78 Electrical characteristics curves STA323W Figure 37. FFT 0 dB, 1 kHz, single ended, 2 dBr +10 +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -120 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 38. FFT 0 dB, 1 kHz, single ended, 3 +10 dBr +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -120 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 39. FFT 0 dB, 1 kHz, single ended, 4 dBr +10 +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 20 50 100 200 500 Hz 30/78 DocID11535 Rev 7 1k 2k 5k 10k 20k STA323W Electrical characteristics curves Figure 40. FFT -60 dB, single ended, 1 kHz, 2 dBr +10 +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 41. FFT -60 dB, single ended, 1 kHz, 4 dBr +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 20 50 100 200 500 1k 2k 5k 10k 20k Hz Figure 42. FFT -60 dB, single ended, 1 kHz, 3 dBr +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 20 50 100 200 500 1k 2k 5k 10k 20k Hz DocID11535 Rev 7 31/78 78 Electrical characteristics curves STA323W Figure 43. PSRR single ended, 500 mV ripple dBr A +10 +0 -10 -20 -30 -40 -50 2 ohm -60 3 ohm -70 4 ohm -80 -90 -100 20 30 40 50 60 70 80 90 100 Hz 32/78 DocID11535 Rev 7 200 STA323W 6 IC bus specification IC bus specification The STA323W supports the IC fast mode (400 kbit/s) protocol. This protocol defines any device that sends data on to the bus as a transmitter and any device that reads the data as a receiver. The device that controls the data transfer is known as the master and the other as the slave. The master always starts the transfer and provides the serial clock for synchronization. The STA323W is always a slave device in all of its communications. 6.1 Communication protocol Data transition or change Data changes on the SDA line must only occur when the SCL clock is low. SDA transition while the clock is high is used to identify a START or STOP condition. Start condition START is identified by a high to low transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A START condition must precede any command for data transfer. Stop condition STOP is identified by a low to high transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A STOP condition terminates communication between STA323W and the bus master. Data input During the data input the STA323W samples the SDA signal on the rising edge of clock SCL. For correct device operation the SDA signal must be stable during the rising edge of the clock and the data can change only when the SCL line is low. 6.2 Device addressing To start communication between the master and the STA323W, the master must initiate with a START condition. Following this, the master sends 8 bits (MSB first) on the SDA line corresponding to the device select address and read or write mode. The 7 MSBs are the device address identifiers, corresponding to the IC bus definition. In the STA323W the IC interface uses a device address of decimal 34 (binary 00100010). The 8th bit (LSB) identifies read or write operation, RW. This bit is set to 1 in read mode and 0 for write mode. After a START condition the STA323W identifies the device address on the bus. If a match is found, it acknowledges the identification on the SDA bus during the 9th bit time. The byte following the device identification byte is the internal space address. DocID11535 Rev 7 33/78 78 IC bus specification 6.3 STA323W Write operation Figure 44. IC write procedure ACK DEV-ADDR BYTE WRITE START ACK ACK SUB-ADDR DATA IN RW STOP ACK DEV-ADDR MULTIBYTE WRITE START ACK ACK SUB-ADDR ACK DATA IN DATA IN RW STOP Following the START condition the master sends a device select code with the RW bit set to 0. The STA323W acknowledges this and then the master writes the internal address byte. After receiving the internal byte address the STA323W again responds with an acknowledgement. Byte write In the byte write mode the master sends one data byte. This is acknowledged by the STA323W. The master then terminates the transfer by generating a STOP condition. Multi-byte write The multi-byte write modes can start from any internal address. Sequential data bytes are written to sequential addresses within the STA323W. The master generates a STOP condition to terminate the transfer. 6.4 Read operation Figure 45. IC read procedure ACK CURRENT ADDRESS READ DEV-ADDR NO ACK DATA RW START STOP ACK RANDOM ADDRESS READ DEV-ADDR START ACK DEV-ADDR RW START RW= ACK HIGH SEQUENTIAL CURRENT READ ACK SUB-ADDR DEV-ADDR NO ACK DATA RW ACK STOP ACK DATA DATA NO ACK DATA STOP START ACK SEQUENTIAL RANDOM READ DEV-ADDR START ACK ACK SUB-ADDR RW DEV-ADDR START ACK DATA RW ACK DATA NO ACK DATA STOP Current address byte read Following the START condition the master sends a device select code with the RW bit set to 1. The STA323W acknowledges this and then responds by sending one byte of data. The master then terminates the transfer by generating a STOP condition. 34/78 DocID11535 Rev 7 STA323W IC bus specification Current address multi-byte read The multi-byte read modes can start from any internal address. Sequential data bytes are read from sequential addresses within the STA323W. The master acknowledges each data byte read and then generates a STOP condition to terminate the transfer. Random address byte read Following the START condition the master sends a device select code with the RW bit set to 0. The STA323W acknowledges this and then the master writes the internal address byte. After receiving, the internal byte address the STA323W again responds with an acknowledgement. The master then initiates another START condition and sends the device select code with the RW bit set to 1. The STA323W acknowledges this and then responds by sending one byte of data. The master then terminates the transfer by generating a STOP condition. Random address multi-byte read The multi-byte read modes can start from any internal address. Sequential data bytes are then read from sequential addresses within the STA323W. The master acknowledges each data byte read and then generates a STOP condition to terminate the transfer. DocID11535 Rev 7 35/78 78 Register descriptions 7 STA323W Register descriptions You must not reprogram the register bits marked "Reserved". It is important that these bits keep their default reset values. Table 13. Register summary Address Name D7 D6 D5 D4 D3 D2 D1 D0 0x00 ConfA FDRB TWAB TWRB IR1 IR0 MCS2 MCS1 MCS0 0x01 ConfB C2IM C1IM DSCKE SAIFB SAI3 SAI2 SAI1 SAI0 0x02 ConfC Reserved CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0 0x03 ConfD MME ZDE DRC BQL PSL DSPB DEMP HPB 0x04 ConfE SVE ZCE DCCV PWMS AME Reserved MPC MPCV 0x05 ConfF EAPD PWDN ECLE LDTE BCLE IDE OCFG0 0x06 Mmute Reserved Reserved Reserved Reserved Reserved Reserved Reserved MMute 0x07 Mvol MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0 0x08 C1Vol C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0 0x09 C2Vol C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0 0x0A C3Vol C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0 0x0B Auto1 AMPS Reserved AMGC1 AMGC0 AMV1 AMV0 AMEQ1 AMEQ0 0x0C Auto2 XO3 XO2 XO1 AMAM2 AMAM1 AMAM0 AMAME 0x0D Auto3 Reserved Reserved Reserved PEQ4 PEQ3 PEQ2 PEQ1 PEQ0 0x0E C1Cfg C1OM1 C1OM0 C1LS1 C1LS0 C1BO C1VBP C1EQBP C1TCB 0x1F C2Cfg C2OM1 C2OM0 C2LS1 C2LS0 C2BO C2VBP C2EQBP C2TCB 0x10 C3Cfg C3OM1 C3OM0 C3LS1 C3LS0 C3BO C3VBP Reserved Reserved 0x11 Tone TTC3 TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0 0x12 L1ar L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0 0x13 L1atrt L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0 0x14 L2ar L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0 0x15 L2atrt L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0 0x16 Cfaddr2 CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0 0x17 B1cf1 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0x18 B1cf2 C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8 0x19 B1cf3 C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0 0x1A B2cf1 C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16 0x1B B2cf2 C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8 0x1C B2cf3 C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0 0x1D A1cf1 C3B23 C3B22 C3B21 C3B20 C3B19 C3B18 C3B17 C3B16 36/78 XO1 DocID11535 Rev 7 OCFG1 STA323W Register descriptions Table 13. Register summary (continued) Address Name D7 D6 D5 D4 D3 D2 D1 D0 0x1E A1cf2 C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8 0x1F A1cf3 C3B7 C3B6 C3B5 C3B4 C3B3 C3B2 C3B1 C3B0 0x20 A2cf1 C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16 0x21 A2cf2 C4B15 C4B14 C4B13 C4B12 C4B11 C4B10 C4B9 C4B8 0x22 A2cf3 C4B7 C4B6 C4B5 C4B4 C4B3 C4B2 C4B1 C4B0 0x23 B0cf1 C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16 0x24 B0cf2 C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8 0x25 B0cf3 C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0 0x26 Cfud Reserved Reserved Reserved Reserved Reserved Reserved WA W1 0x27 MPCC1 MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8 0x28 MPCC2 MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0 0x29 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved 0x2A Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved 0x2B FDRC1 FDRC15 FDRC14 FDRC13 FDRC12 FDRC11 FDRC10 FDRC9 FDRC8 0x2C FDRC2 FDRC7 FDRC6 FDRC5 FDRC4 FDRC3 FDRC2 FDRC1 FDRC0 0x2D Status PLLUL Reserved Reserved Reserved Reserved Reserved FAULT 7.1 7.1.1 TWARN Configuration register A (address 0x00) D7 D6 D5 D4 D3 D2 D1 D0 FDRB TWAB TWRB IR1 IR0 MCS2 MCS1 MCS0 0 1 1 0 0 0 1 1 Master clock select Table 14. Master clock select Bit R/W RST Name 0 RW 1 MCS0 1 RW 1 MCS1 2 RW 0 MCS2 Description Master clock select: selects the ratio between the input IS sample frequency and the input clock. The STA323W supports sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz. Therefore the internal clock is: 32.768 MHz for 32 kHz 45.1584 MHz for 44.1 kHz, 88.2 kHz, and 176.4 kHz 49.152 MHz for 48 kHz, 96 kHz, and 192 kHz DocID11535 Rev 7 37/78 78 Register descriptions STA323W The external clock frequency provided to the XTI pin must be a multiple of the input sample frequency (fs). The correlation between the input clock and the input sample rate is determined by the status of the MCSx bits and the IR (input rate) register bits. The MCSx bits determine the PLL factor generating the internal clock and the IR bit determines the oversampling ratio used internally. Table 15. IR and MCS settings for input sample rate and clock rate Input sample rate fs (kHz) 7.1.2 MCS[2:0] IR 000 001 010 011 100 101 32, 44.1, 48 00 768 * fs 512 * fs 384 * fs 256 * fs 128 * fs 576 * fs 88.2, 96 01 384 * fs 256 * fs 192 * fs 128 * fs 64 * fs x 176.4, 192 1X 384 * fs 256 * fs 192 * fs 128 * fs 64 * fs x Interpolation ratio select Table 16. Interpolation ratio select Bit R/W 4:3 RW RST 00 Name IR[1:0] Description Selects internal interpolation ratio based on input IS sample frequency The STA323W has variable interpolation (re-sampling) settings such that internal processing and DDX output rates remain consistent. The first processing block interpolates by either 2 times or 1 time (pass-through) or provides a down-sample by a factor of 2. The IR bits determine the re-sampling ratio of this interpolation. Table 17. IR bit settings as a function of input sample rate Input sample rate fs (kHz) 38/78 IR[1, 0] 1st stage interpolation ratio 32 00 2 times over-sampling 44.1 00 2 times over-sampling 48 00 2 times over-sampling 88.2 01 Pass-Through 96 01 Pass-Through 176.4 10 Down-sampling by 2 192 10 Down-sampling by 2 DocID11535 Rev 7 STA323W 7.1.3 Register descriptions Thermal warning recovery bypass Table 18. Thermal warning recovery bypass Bit 5 R/W RW RST 1 Name Description 0: thermal warning recovery enabled 1: thermal warning recovery disabled TWRB If the thermal warning adjustment is enabled (TWAB = 0), then the thermal warning recovery determines if the adjustment is removed when thermal warning is negative. If TWRB = 0 and TWAB = 0, then, when a thermal warning disappears, the gain adjustment determined by the thermal warning post-scale (default = -3 dB) is removed and the gain is applied to the system. If TWRB = 1 and TWAB = 0, then when a thermal warning disappears, the thermal warning post-scale gain adjustment remains until TWRB is changed to zero or the device is reset. 7.1.4 Thermal warning adjustment bypass Table 19. Thermal warning adjustment bypass Bit 6 R/W RW RST 1 Name Description 0: thermal warning adjustment enabled 1: thermal warning adjustment disabled TWAB The STA323W on-chip power output block provides feedback to the digital controller by the power control block inputs. The TWARN input is used to indicate a thermal warning condition. When TWARN is active (set to 0 for a period greater than 400 ms) the power control block forces an adjustment to the modulation limit in an attempt to eliminate the thermal warning condition. Once the thermal warning volume adjustment is applied, whether the gain is reapplied when TWARN is inactive, depends on the TWRB bit. 7.1.5 Fault detect recovery bypass Table 20. Fault detect recovery bypass Bit 7 R/W RW RST 0 Name FDRB Description 0: fault detector recovery enabled 1: fault detector recovery disabled The DDX power block provides feedback to the digital controller using inputs to the power control block. The FAULT input is used to indicate a fault condition (either over-current or thermal). When FAULT is active (set to 0), the power control block attempts a recovery from the fault by activating the 3-state output (setting it to 0 which directs the power output block to begin recovery). It holds it at 0 for period of time in the range of 0.1 ms to 1 second as defined by the fault-detect recovery constant register (FDRC registers 0x29-0x2A), then toggles it back to 1. This sequence is repeated as long as the fault indication exists. This feature is enabled by default but can be bypassed by setting the FDRB control bit to 1. DocID11535 Rev 7 39/78 78 Register descriptions 7.2 7.2.1 STA323W Configuration register B (address 0x01) D7 D6 D5 D4 D3 D2 D1 D0 C2IM C1IM DSCKE SAIFB SAI3 SAI2 SAI1 SAI0 1 0 0 0 0 0 0 0 Serial audio input interface format Table 21. Serial audio input interface format Bit 7.2.2 R/W RST Name Description 3:0 RW 0000 SAI[3:0] Determines the interface format of the input serial digital audio interface. 4 RW 0 SAIFB Data format: 0: MSB first1: LSB first Serial data interface The STA323W serial audio input interfaces with standard digital audio components and accepts several different serial data formats. The STA323W always acts as a slave when receiving audio input from standard digital audio components. Serial data for two channels is provided using 3 input pins: left/right clock LRCKI, serial clock BICKI, and serial data SDI. The SAI register (configuration register B (address 0x01) bits D3-D0) and the SAIFB register (configuration register B (address 0x01) bit D4) are used to specify the serial data format. The default serial data format is ISIS, MSB first. The formats available are shown in Figure 46 and in Table 21 and Table 22. Figure 46. General serial input and output formats 2 IS Left LRCLK Right SCLK MSB SDATA LSB MSB LSB MSB Left Justified Left LRCLK Right SCLK SDATA MSB LSB MSB LSB MSB Right Justified Left LRCLK Right SCLK SDATA MSB LSB MSB LSB MSB Table 22. lists the serial audio input formats supported by STA323W when BICKI = 32 * fs, 48 * fs or 64 * fs, where the sampling rate fs = 32, 44.1, 48, 88.2, 96, 176.4 or 192 kHz. 40/78 DocID11535 Rev 7 STA323W Register descriptions Table 22. Supported serial audio input formats BICKI 32 * fs 48 * fs 64 * fs SAI[3:0] SAIFB Interface format 1100 X IS 15-bit data 1110 X Left/right-justified 16-bit data 0100 X IS 23-bit data 0100 X IS 20-bit data 1000 X IS 18-bit data 0100 0 MSB first IS 16-bit data 1100 1 LSB first IS 16-bit data 0001 X Left-justified 24-bit data 0101 X Left-justified 20-bit data 1001 X Left-justified 18-bit data 1101 X Left-justified 16-bit data 0010 X Right-justified 24-bit data 0110 X Right-justified 20-bit data 1010 X Right-justified 18-bit data 1110 X Right-justified 16-bit data 0000 X IS 24-bit data 0100 X IS 20-bit data 1000 X IS 18-bit data 0000 0 MSB first IS 16-bit data 1100 1 LSB first IS 16-bit data 0001 X Left-justified 24-bit data 0101 X Left-justified 20-bit data 1001 X Left-justified 18-bit data 1101 X Left-justified 16-bit data 0010 X Right-justified 24-bit data 0110 X Right-justified 20-bit data 1010 X Right-justified 18-bit data 1110 X Right-justified 16-bit data For example, SAI = 1110 and SAIFB = 1 specifies right justified 16-bit data, LSB first. DocID11535 Rev 7 41/78 78 Register descriptions STA323W Table 23. Serial input data timing characteristics (fs = 32 to 192 kHz) parameter Timing BICKI frequency (slave mode) 12.5 MHz max. BICKI pulse width high (T1) (slave mode) 40 ns min. BICKI active to LRCKI edge delay (T2) 20 ns min. BICKI active to LRCKI edge delay (T3) 20 ns min. SDI valid to BICKI active setup (T4) 20 ns min. BICKI active to SDI hold time (T5) 20 ns min. Figure 47. Serial input and data timing T2 T3 LRCKI T1 T0 BICKI T4 SDI T5 7.2.3 Delay serial clock enable Table 24. Delay serial clock enable Bit 5 R/W RW RST 0 Name 0: no serial clock delay 1: serial clock delay by 1 core clock cycle to tolerate anomalies in some IS master devices DSCKE g Description Table 25. Channel input mapping Bit R/W RST Name Description 6 RW 0 C1IM 0: processing channel 1 receives left IS input 1: processing channel 1 receives right IS input 7 RW 1 C2IM 0: processing channel 2 receives left IS input 1: processing channel 2 receives right IS input Each channel received from the IS can be mapped to any internal processing channel via the channel input mapping registers. This allows processing flexibility. The default settings of these registers map each IS input channel to its corresponding processing channel. 42/78 DocID11535 Rev 7 STA323W 7.3 7.3.1 Register descriptions Configuration register C (address 0x02) D7 D6 D5 D4 D3 D2 D1 D0 Reserved CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0 0 1 0 0 0 0 1 0 DDX(R) power-output mode Table 26. DDX(R) power-output mode Bit 1:0 R/W RW RST 10 Name Description Selects configuration of DDX(R) output. OM[1:0] The DDX(R) power output mode selects how the DDX(R) output timing is configured. Different power devices can use different output modes. The recommended use is OM = 10. When OM = 11 the CSZ bits determine the size of the DDX(R) compensating pulse. Table 27. DDX(R) output modes OM[1,0] 7.3.2 Output stage - mode 00 Not used 01 Not used 10 Recommended 11 Variable compensation DDX(R) variable compensating pulse size The DDX(R) variable compensating pulse size is intended to adapt to different power stage ICs. Contact ST for support when using this function. Table 28. DDX(R) compensating pulse CSZ[4:0] Compensating pulse size 00000 0 clock period compensating pulse size 00001 1 clock period compensating pulse size ... ... 10000 16 clock period compensating pulse size ... ... 11111 31 clock period compensating pulse size DocID11535 Rev 7 43/78 78 Register descriptions 7.4 7.4.1 STA323W Configuration register D (address 0x03) D7 D6 D5 D4 D3 D2 D1 D0 MME ZDE DRC BQL PSL DSPB DEMP HPB 0 1 0 0 0 0 0 0 High-pass filter bypass Table 29. High-pass filter bypass Bit 0 R/W RW RST 0 Name Description 0: AC coupling high pass filter enabled 1: AC coupling high pass filter enabled HPB The STA323W features an internal digital high-pass filter for DC blocking. The purpose of this filter is to prevent DC signals from passing through a DDX(R) amplifier. DC signals can cause speaker damage. 7.4.2 De-emphasis Table 30. De-emphasis Bit 1 R/W RW RST 0 Name Description 0: no de-emphasis 1: de-emphasis DEMP By setting this bit to 1, de-emphasis is implemented on all channels. DSPB (DSP Bypass, Bit D2, CFA) bit must be set to 0 for de-emphasis to function. 7.4.3 DSP bypass Table 31. DSP bypass Bit 2 R/W RW RST 0 Name DSPB Description 0: normal operation 1: bypass of EQ and mixing functionality Setting the DSPB bit bypasses all the EQ and mixing functions of the STA323W core. 44/78 DocID11535 Rev 7 STA323W 7.4.4 Register descriptions Post-scale link Table 32. Post-scale link Bit 3 R/W RW RST 0 Name Description 0: each channel uses individual post-scale value 1: each channel uses channel 1 post-scale value PSL Post-scale functionality is an attenuation placed after the volume control and directly before the conversion to PWM. Post-scale can also be used to limit the maximum modulation index and therefore the peak current. Setting 1, in the PSL register, causes the value stored in Channel 1 post-scale to be used for all three internal channels. 7.4.5 Biquad coefficient link Table 33. Biquad coefficient link Bit 4 R/W RW RST 0 Name Description 0: each channel uses coefficient values 1: each channel uses channel 1 coefficient values BQL For ease of use, all channels can use the biquad coefficients loaded into the channel 1 coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to be performed once. 7.4.6 Dynamic range compression/anti-clipping bit Table 34. Dynamic range compression/anti-clipping bit Bit 5 R/W RW RST 0 Name Description 0: limiters act in anti-clipping mode 1: limiters act in dynamic range compression mode DRC Both limiters can be used in one of two ways: anti-clipping or dynamic range compression. When used in anti-clipping mode the limiter threshold values are constant and dependent on the limiter settings. In dynamic range compression mode the limiter threshold values vary with the volume settings allowing a nighttime listening mode that provides a reduction in the dynamic range regardless of the volume level. 7.4.7 Zero-detect mute enable Table 35. Zero-detect mute enable Bit 6 R/W RW RST 1 Name ZDE Description Setting of 1 enables the automatic zero-detect mute Setting the ZDE bit enables the zero-detect automatic mute. When ZDE = 1, the zero-detect circuit looks at the input data to each processing channel after the channel-mapping block. If any channel receives 2048 consecutive zero value samples (regardless of fs) then that individual channel is muted if this function is enabled. DocID11535 Rev 7 45/78 78 Register descriptions 7.5 7.5.1 STA323W Configuration register E (address 0x04) D7 D6 D5 D4 D3 D2 D1 D0 SVE ZCE Reserved PWMS AME Reserved MPC MPCV 1 1 0 0 0 0 1 0 Max power correction variable Table 36. Max power correction variable Bit 0 R/W RW RST 0 Name Description 0: use standard MPC coefficient 1: use MPCC bits for MPC coefficient MPCV By enabling MPC and setting MPCV = 1, the max power correction becomes variable. By adjusting the MPCC registers (address 0x27-0x28) it is possible to adjust the THD at maximum unclipped power to a lower value for a particular application. 7.5.2 Max power correction Table 37. Max power correction Bit 1 R/W RW RST 1 Name Description 0: MPC disabled 1: MPC enabled MPC Setting the MPC bit corrects the power device at high power. This mode lowers the THD+N of the full DDX(R) system at, and slightly below, maximum power output. 7.5.3 AM mode enable Table 38. AM mode enable Bit 3 R/W RW RST 0 Name Description 0: normal DDX(R) operation 1: AM reduction mode DDX(R) operation AME The STA323W features a DDX(R) processing mode that minimizes the amount of noise generated in the frequency range of AM radio. This mode is intended for use when DDX(R) is operating in a device with an active AM tuner. The SNR of the DDX(R) processing is reduced to ~83 dB in this mode, which is still greater than the SNR of AM radio. 7.5.4 PWM speed mode Table 39. PWM speed mode Bit 4 46/78 R/W RW RST 0 Name PWMS Description Normal or odd DocID11535 Rev 7 STA323W Register descriptions Table 40. PWM output speed selections PWMS[1:0] 7.5.5 PWM output speed 0 Normal speed (384kHz) all channels 1 Odd speed (341.3kHz) all channels Zero-crossing volume enable Table 41. Zero-crossing volume enable Bit 6 R/W RW RST 1 Name Description 1: volume adjustments will only occur at digital zerocrossings 0: volume adjustments will occur immediately ZCE The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital zero-crossings no clicks are audible. 7.5.6 Soft volume update enable Table 42. Soft volume update enable Bit 7 R/W RW RST 1 Name SVE Description 1: volume adjustments will use soft volume 0: volume adjustments will occur immediately The STA323W includes a soft volume algorithm that steps through the intermediate volume values at a predetermined rate when a volume change occurs. By setting SVE = 0 this can be bypassed and volume changes will jump from the old to the new value directly. This feature is available only if individual channel volume bypass bit is set to 0. DocID11535 Rev 7 47/78 78 Register descriptions 7.6 7.6.1 STA323W Configuration register F (address 0x05) D7 D6 D5 D4 D3 D2 D1 D0 EAPD PWDN ECLE Reserved BCLE IDE OCFG1 OCFG0 0 1 0 1 1 1 0 0 Output configuration selection Table 43. Output configuration selection Bit 1:0 R/W RW RST 00 Name OCFG[1:0] Description 00: 2-channel (full-bridge) power, 1-channel DDX is default Table 44. Output configuration selections OCFG[1:0] Output power configuration 00 2 channel (full-bridge) power, 1 channel DDX: 1A/1B 1A/1B 2A/2B 2A/2B 01 2(half-bridge).1(full-bridge) on-board power: 1A 1A Binary 2A 1B Binary 3A/3B 2A/2B Binary 10 Reserved 11 1 channel mono-parallel: 3A 1A/1B 3B 2A/2B Table 45. Invalid input detect mute enable Bit 2 R/W RW RST 1 Name Description 0: disabled 1: enabled IDE Setting the IDE bit enables this function, which looks at the input IS data and clocking and automatically mutes all outputs if the signals are invalid. Table 46. Binary clock loss detection enable Bit 3 R/W RW RST 1 Name BCLE Description 0: disabled 1: enabled Detects loss of input MCLK in binary mode and outputs 50% duty cycle to prevent audible noise when input clocking is lost. 48/78 DocID11535 Rev 7 STA323W Register descriptions Table 47. Auto-EAPD on clock loss enable Bit 5 R/W RW RST 0 Name Description 0: disabled 1: enabled ECLE When ECLE is active, it issues a power device power down signal (EAPD) on clock loss detection. Table 48. Software power down Bit 6 R/W RW RST 1 Name Description Software power down: 0: power down mode: initiates a power-down sequence which results in a soft mute of all channels and finally asserts EAPD circa 260 ms later 1: normal operation PWDN Table 49. External amplifier power down Bit 7 R/W RW RST 0 Name EAPD Description 0: external power stage power down active 1: normal operation EAPD is used to actively power down a connected DDX(R) power device. This register has to be written to 1 at start-up to enable the DDX(R) power device for normal operation. DocID11535 Rev 7 49/78 78 Register descriptions STA323W 7.7 Volume control 7.7.1 Master controls Master mute register (address 0x06) D7 D6 D5 D4 D3 D2 D1 D0 Reserved Reserved Reserved Reserved Reserved Reserved Reserved MMUTE 0 0 0 0 0 0 0 0 Master volume register (Address 0x07) D7 D6 D5 D4 D3 D2 D1 D0 MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0 1 1 1 1 1 1 1 1 Note: The value of volume derived from MV is dependent on the AMV AutoModesTM volume settings. 7.7.2 Channel controls Channel 1 volume (address 0x08) D7 D6 D5 D4 D3 D2 D1 D0 C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0 0 1 1 0 0 0 0 0 Channel 2 volume (address 0x09) D7 D6 D5 D4 D3 D2 D1 D0 C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0 0 1 1 0 0 0 0 0 Channel 3 volume (address 0x0A) 7.7.3 D7 D6 D5 D4 D3 D2 D1 D0 C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0 0 1 1 0 0 0 0 0 Volume description The volume structure of the STA323W consists of individual volume registers for each of the three channels and a master volume register, and individual channel volume trim registers. The channel volume settings are normally used to set the maximum allowable digital gain and to hard-set gain differences between certain channels. These values are normally set at the initialization of the IC and not changed. The individual channel volumes are adjustable in 0.5-dB steps from +48 dB to -80 dB. The master volume control is normally mapped to the master volume of the system. The values of these two settings are summed to find the actual gain or volume value for any given channel. When set to 1, the Master Mute will mute all channels, whereas the individual channel mutes (CxM) will mute only that channel. Both the Master Mute and the Channel Mutes 50/78 DocID11535 Rev 7 STA323W Register descriptions provide a "soft mute", that is, a gradual muting with the volume ramping down to mute in 4096 samples from the maximum volume setting at the internal processing rate of circa 96 kHz. A "hard mute" can be obtained by setting a value of 0xFF in any channel volume register or the master volume register. When volume offsets are provided, via the master volume register, any channel whose total volume is less than -100 dB is muted. All changes in volume take place at zero-crossings when ZCE = 1 (configuration register E) on a per channel basis as this creates the smoothest possible volume transitions. When ZCE = 0, volume updates occur immediately. The STA323W also features a soft-volume update function. When SVE = 1 (in configuration register E) the volume ramps between intermediate values when the value is updated, This feature can be disabled by setting SVE = 0. Each channel also contains an individual channel volume bypass. If a particular channel has volume bypassed via the CxVBP = 1 register then only the channel volume setting for that particular channel affects the volume setting, the master volume setting does not affect that channel. Also, master soft-mute does not affect the channel if CxVBP = 1. Each channel also contains a channel mute. If CxM = 1 a soft mute is performed on that channel. Table 50. Master volume offset as a function of MV[7:0] MV[7:0] Volume offset from channel value 00000000 (0x00) 0 dB 00000001 (0x01) -0.5 dB 00000010 (0x02) -1 dB ... ... 01001100 (0x4C) -38 dB ... ... 11111110 (0xFE) -127 dB 11111111 (0xFF) Hard Master Mute Table 51. Channel volume as a function of CxV[7:0] CxV[7:0] Volume 00000000 (0x00) +48 dB 00000001 (0x01) +47.5 dB 00000010 (0x02) +47 dB ... ... 01100001 (0x5F) +0.5 dB 01100000 (0x60) 0 dB 01011111 (0x61) -0.5 dB ... ... 11111110 (0xFE) -79.5 dB 11111111 (0xFF) Hard channel mute DocID11535 Rev 7 51/78 78 Register descriptions STA323W 7.8 AutoModesTM registers 7.8.1 AutoModesTM EQ, volume, GC (address 0x0B) D7 D6 D5 D4 D3 D2 D1 D0 AMPS Reserved AMGC1 AMGC0 AMV1 AMV0 AMEQ1 AMEQ0 1 0 0 0 0 0 0 0 Table 52. AutoModesTM EQ AMEQ[1,0] Mode (Biquad 1-4) 00 User Programmable 01 Preset EQ - PEQ bits 10 Auto Volume Controlled Loudness Curve 11 Not used Setting AMEQ to any value, other than 00, enables AutoModesTM EQ. When set, biquads 14 are not user programmable. Any coefficient settings for these biquads is ignored. Also when AutoModesTM EQ is used the pre-scale value for channels 1 and 2 becomes hard-set to -18 dB. Table 53. AutoModesTM volume AMV[1,0] Mode (MVOL) 00 MVOL 256, 0.5-dB steps (standard) 01 MVOL auto curve 30 steps 10 MVOL auto curve 40 steps 11 MVOL auto curve 50 steps Table 54. AutoModesTM gain compression/limiters AMGC[1:0] Mode 00 User programmable GC 01 AC no clipping 10 AC limited clipping (10%) 11 DRC night time listening mode Table 55. AMPS - AutoModesTM auto pre scale Bit 0 52/78 R/W RW RST 0 Name AMPS Description AutoMode pre-scale 0: -18 dB used for pre-scale when AMEQ neq 00 1: User defined pre-scale when AMEQ neq 00 DocID11535 Rev 7 STA323W 7.8.2 Register descriptions AutoModesTM AM/pre-scale/bass management scale (address 0x0C) D7 D6 D5 D4 D3 D2 D1 D0 XO3 XO2 XO1 XO0 AMAM2 AMAM1 AMAM0 AMAME 0 0 0 0 0 0 0 0 Table 56. AutoModesTM AM switching enable Bit R/W RST Name Description 0 RW 0 AMAME 0: switching frequency determined by PWMS setting 1: switching frequency determined by AMAM settings 3:1 RW 000 AMAM[2:0] Default: 000 Table 57. AutoModesTM AM switching frequency selection AMAM[2:0] 48 kHz/96 kHz input fs 44.1 kHz/88.2 kHz input fs 000 0.535 MHz - 0.720 MHz 0.535 MHz - 0.670 MHz 001 0.721 MHz - 0.900 MHz 0.671 MHz - 0.800 MHz 010 0.901 MHz - 1.100 MHz 0.801 MHz - 1.000 MHz 011 1.101 MHz - 1.300 MHz 1.001 MHz - 1.180 MHz 100 1.301 MHz - 1.480 MHz 1.181 MHz - 1.340 MHz 101 1.481 MHz - 1.600 MHz 1.341 MHz - 1.500 MHz 110 1.601 MHz - 1.700 MHz 1.501 MHz - 1.700 MHz When DDX(R) is used with an AM radio tuner, it is recommended to use the AMAM bits to automatically adjust the output PWM switching rate so that it depends on the specific radio frequency that the tuner is receiving. The values used in AMAM are also dependent upon the sample rate that is determined by the ADC used. Table 58. AutoModesTM crossover setting Bit 7:4 R/W RW RST 0 Name Description 000: user defined crossover coefficients are used Otherwise: preset coefficients are used for the required crossover setting XO[3:0] Table 59. Crossover frequency selection XO[2:0] Bass management - crossover frequency 0000 User 0001 80 Hz 0010 100 Hz 0011 120 Hz 0100 140 Hz DocID11535 Rev 7 53/78 78 Register descriptions STA323W Table 59. Crossover frequency selection (continued) XO[2:0] 7.8.3 Bass management - crossover frequency 0101 160 Hz 0110 180 Hz 0111 200 Hz 1000 220 Hz 1001 240 Hz 1010 260 Hz 1011 280 Hz 1100 300 Hz 1101 320 Hz 1110 340 Hz 1111 360 Hz Preset EQ settings (address 0x0D) D7 D6 D5 D4 D3 D2 D1 D0 Reserved Reserved Reserved PEQ4 PEQ3 PEQ2 PEQ1 PEQ0 0 0 0 0 0 0 0 0 Table 60. Preset EQ selection PEQ[3:0] 54/78 Setting 00000 Flat 00001 Rock 00010 Soft Rock 00011 Jazz 00100 Classical 00101 Dance 00110 Pop 00111 Soft 01000 Hard 01001 Party 01010 Vocal 01011 Hip-Hop 01100 Dialog 01101 Bass-boost #1 01110 Bass-boost #2 01111 Bass-boost #3 DocID11535 Rev 7 STA323W Register descriptions Table 60. Preset EQ selection (continued) PEQ[3:0] Setting 10000 Loudness 1 (least boost) 10001 Loudness 2 10010 Loudness 3 10011 Loudness 4 10100 Loudness 5 10101 Loudness 6 10110 Loudness 7 10111 Loudness 8 11000 Loudness 9 11001 Loudness 10 11010 Loudness 11 11011 Loudness 12 11100 Loudness 13 11101 Loudness 14 11110 Loudness 15 11111 Loudness 16 (most boost) 7.9 Channel configuration registers 7.9.1 Channel 1 configuration (address 0x0E) 7.9.2 D7 D6 D5 D4 D3 D2 D1 D0 C1OM1 C1OM0 C1LS1 C1LS0 C1BO C1VBP C1EQBP C1TCB 0 0 0 0 0 0 0 0 Channel 2 configuration (address 0x0F) D7 D6 D5 D4 D3 D2 D1 D0 C2OM1 C2OM0 C2LS1 C2LS0 C2BO C2VBP C2EQBP C2TCB 0 0 0 0 0 0 0 0 DocID11535 Rev 7 55/78 78 Register descriptions 7.9.3 STA323W Channel 3 configuration (address 0x10) D7 D6 D5 D4 D3 D2 D1 D0 C3OM1 C3OM0 C3LS1 C3LS0 C3BO C3VBP Reserved Reserved 0 0 0 0 0 0 0 0 EQ control can be bypassed on a per channel basis. If EQ control is bypassed on a given channel the prescale and all 9 filters (high-pass, biquads, de-emphasis, bass management cross-over, bass, treble in any combination) are bypassed for that channel. CxEQBP: 0: perform EQ on channel X (normal operation) 1: bypass EQ on channel X Tone control (bass and treble) can be bypassed on a per channel basis. If tone control is bypassed on a given channel the two filters that tone control utilizes are bypassed. CxTCB: 0: perform tone control on channel x - (default operation) 1: bypass tone control on channel x Each channel can be configured to output either the patented DDX PWM data or standard binary PWM encoded data. By setting the CxBO bit to `1', each channel can be individually set to binary operation mode. It is also possible to map each channel independently to either of the two limiters available within the STA323W. In the default mode the channels are not mapped to a limiter. Table 61. Channel Limiter Mapping Selection CxLS[1,0] Channel limiter mapping 00 Channel has limiting disabled 01 Channel is mapped to limiter #1 10 Channel is mapped to limiter #2 Each PWM output channel can receive data from any channel output of the volume block. Which channel a particular PWM output receives depends on the CxOM register bits for that channel. Table 62. Channel PWM output mapping CxOM[1:0] 56/78 PWM output from 00 Channel 1 01 Channel 2 10 Channel 3 11 Not used DocID11535 Rev 7 STA323W 7.10 Register descriptions Tone control (address 0x11) D7 D6 D5 D4 D3 D2 D1 D0 TTC3 TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0 0 1 1 1 0 1 1 1 Table 63. Tone control boost/cut selection BTC[3:0]/TTC[3:0] Boost/cut 0000 -12 dB 0001 -12 dB ... ... 0111 -4 dB 0110 -2 dB 0111 0 dB 1000 +2 dB 1001 +4 dB ... ... 1101 +12 dB 1110 +12 dB 1111 +12 dB 7.11 Dynamics control 7.11.1 Limiter 1 attack/release threshold (address 0x12) 7.11.2 7.11.3 D7 D6 D5 D4 D3 D2 D1 D0 L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0 0 1 1 0 1 0 1 0 Limiter 1 attack/release threshold (address 0x13) D7 D6 D5 D4 D3 D2 D1 D0 L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0 0 1 1 0 1 0 0 1 Limiter 2 attack/release rate (address 0x14) D7 D6 D5 D4 D3 D2 D1 D0 L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0 0 1 1 0 1 0 1 0 DocID11535 Rev 7 57/78 78 Register descriptions 7.11.4 7.11.5 STA323W Limiter 2 attack/release threshold (address 0x15) D7 D6 D5 D4 D3 D2 D1 D0 L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0 0 1 1 0 1 0 0 1 Dynamics control description The STA323W includes two independent limiter blocks. The purpose of the limiters is to automatically reduce the dynamic range of a recording to prevent the outputs from clipping in anti-clipping mode, or to actively reduce the dynamic range for a better listening environment (such as a night-time listening mode, which is often needed for DVDs.) The two modes are selected via the DRC bit in Configuration Register D, bit 5 address 0x03. Each channel can be mapped to Limiter1 or Limiter2, or not mapped. If a channel is not mapped, that channel will clip normally when 0 dB FS is exceeded. Each limiter will look at the present value of each channel that is mapped to it, select the maximum absolute value of all these channels, perform the limiting algorithm on that value, and then, if needed, adjust the gain of the mapped channels in unison. The limiter attack thresholds are determined by the LxAT registers. When the Attack Threshold has been exceeded, the limiter, when active, automatically starts reducing the gain. The rate at which the gain is reduced when the attack threshold is exceeded is dependent upon the attack rate register setting for that limiter. A peak-detect algorithms used to control the gain reduction. The release of limiter, when the gain is again increased, is dependent on an RMS-detect algorithm. The output of the volume limiter block is passed through an RMS filter. The output of this filter is compared with the release threshold, determined by the Release Threshold register. When the RMS filter output falls below the release threshold, the gain is increased at a rate dependent upon the release rate register. The gain can never be increased past its set value and therefore the release will only occur if the limiter has already reduced the gain. The release threshold value can be used to set what is effectively a minimum dynamic range. This is helpful as over-limiting can reduce the dynamic range to virtually zero and cause program material to sound "lifeless". In AC mode the attack and release thresholds are set relative to full-scale. In DRC mode the attack threshold is set relative to the maximum volume setting of the channels mapped to that limiter and the release threshold is set relative to the maximum volume setting plus the attack threshold. Figure 48. Basic limiter and volume flow diagram Limiter RMS Gain/volume Input Output Gain 58/78 Attenuation DocID11535 Rev 7 Saturation STA323W Register descriptions Table 64. Limiter attack rate selection LxA[3:0] Attack rate dB/ms 0000 3.1584 0001 2.7072 0010 2.2560 0011 1.8048 0100 1.3536 0101 0.9024 0110 0.4512 0111 0.2256 1000 0.1504 1001 0.1123 1010 0.0902 1011 0.0752 1100 0.0645 1101 0.0564 1110 0.0501 1111 0.0451 Fast Slow Table 65. Limiter release rate selection LxR[3:0] Release rate dB/ms 0000 0.5116 0001 0.1370 0010 0.0744 0011 0.0499 0100 0.0360 0101 0.0299 0110 0.0264 0111 0.0208 1000 0.0198 1001 0.0172 1010 0.0147 1011 0.0137 1100 0.0134 1101 0.0117 1110 0.0110 1111 0.0104 DocID11535 Rev 7 Fast Slow 59/78 78 Register descriptions 7.11.6 STA323W Anti-clipping mode Table 66. Limiter attack - threshold selection (AC-mode) LxAT[3:0] AC (dB relative to FS) 0000 -12 0001 -10 0010 -8 0011 -6 0100 -4 0101 -2 0110 0 0111 +2 1000 +3 1001 +4 1010 +5 1011 +6 1100 +7 1101 +8 1110 +9 1111 +10 . Table 67. Limiter release threshold selection (AC-mode) LxRT[3:0] 60/78 AC (dB relative to FS) 0000 - 0001 -29dB 0010 -20dB 0011 -16dB 0100 -14dB 0101 -12dB 0110 -10dB 0111 -8dB 1000 -7dB 1001 -6dB 1010 -5dB 1011 -4dB 1100 -3dB 1101 -2dB DocID11535 Rev 7 STA323W Register descriptions Table 67. Limiter release threshold selection (AC-mode) (continued) LxRT[3:0] 7.11.7 AC (dB relative to FS) 1110 -1dB 1111 -0dB Dynamic range compression mode Table 68. Limiter attack - threshold selection (DRC-mode) LxAT[3:0] DRC (dB relative to volume) 0000 -31 0001 -29 0010 -27 0011 -25 0100 -23 0101 -21 0110 -19 0111 -17 1000 -16 1001 -15 1010 -14 1011 -13 1100 -12 1101 -10 1110 -7 1111 -4 DocID11535 Rev 7 61/78 78 Register descriptions .( STA323W Table 69. Limiter release threshold selection (DRC-mode) LxRT[3:0] 62/78 DRC (db relative to Volume + LxAT) 0000 - 0001 -38 dB 0010 -36 dB 0011 -33 dB 0100 -31 dB 0101 -30 dB 0110 -28 dB 0111 -26 dB 1000 -24 dB 1001 -22 dB 1010 -20 dB 1011 -18 dB 1100 -15 dB 1101 -12 dB 1110 -9 dB 1111 -6 dB DocID11535 Rev 7 STA323W User-programmable settings 8 User-programmable settings 8.1 EQ - biquad equation The biquads use the equation that follows. This is shown in Figure 49. Y[n] = 2(b0/2)X[n] + 2(b1/2)X[n-1] + b2X[n-2] - 2(a1/2)Y[n-1] - a2Y[n-2] = b0X[n] + b1X[n-1] + b2X[n-2] - a1Y[n-1] - a2Y[n-2] where Y[n] represents the output and X[n] represents the input. Signed, fractional 28-bit multipliers are used, with coefficient values in the range of 0x800000 (-1) to 0x7FFFFF (0.9999998808). Coefficients stored in the user defined coefficient RAM are referenced in the following manner: CxHy0 = b1/2 CxHy1 = b2 CxHy2 = -a1/2 CxHy3 = -a2 CxHy4 = b0/2 The x represents the channel and the y the biquad number. For example C3H41 is the b0/2 coefficient in the fourth biquad for channel 3. Figure 49. Biquad filter b0/2 2 + Z -1 Z -1 b1/2 2 + 2 -a1/2 Z -1 Z -1 b2 8.2 + -a2 Pre-scale The pre-scale block, which precedes the first biquad, is used for attenuation when filters are designed that boost frequencies above 0 dBFS. The Pre-Scale block is a single 28-bit signed multiplier, with 0x800000 = -1 and 0x7FFFFF = 0.9999998808. By default, all pre-scale factors are set to 0x7FFFFF. 8.3 Post-scale The STA323W provides one additional multiplication after the last interpolation stage and before the distortion compensation on each channel. The post-scale block is a 24-bit signed fractional multiplier. The scale factor for this multiplier is loaded into RAM using the same IC registers as the biquad coefficients and the mix. All channels can use the same settings as channel 1 by setting the post-scale link bit. DocID11535 Rev 7 63/78 78 User-programmable settings 8.4 STA323W Mix/bass management The STA323W provides one post-EQ mixing block per channel. Each channel has two mixing coefficients, which are each 24-bit signed fractional multipliers, that correspond to the two channels of input to the mixing block. These coefficients are accessible via the User Controlled Coefficient RAM described below. The mix coefficients expressed as 24-bit signed, fractional numbers in the range +1.0 (8388607) to -1.0 (-8388608), are used to provide three channels of output from two channels of filtered input. Figure 50. Mix/bass management block diagram Channel #1 from EQ C1MX1 . Channel #2 from EQ High pass XO filter Channel #1 to GC/vol High pass XO filter Channel #2 to GC/vol Low pass XO filter Channel #3 to GC/vol C1MX2 C2MX1 . C2MX2 C3MX1 . C3MX2 User defined mix coefficients Crossover frequency determined by XO setting. User defined when XO = 000 After mixing, STA323W also permits the implementation of crossover filters on all channels corresponding to 2.1 bass management operation. Channels 1 and 2 use a 1st order, highpass filter and channel 3 uses a 2nd-order low-pass filter corresponding to the setting of the XO bits of ICIC register 0x0C. If XO = 000, user specified crossover filters are used. By default these coefficients correspond to pass-through. However, the user can write these coefficients in a similar way as the EQ biquads. When user-defined setting is selected, the user can only write 2nd-order crossover filters. This output is then passed on to the Volume and Limiter block. 64/78 DocID11535 Rev 7 STA323W 8.5 User-programmable settings Calculating 24-bit signed fractional numbers from a dB value The pre-scale, mixing, and post-scale functions of the STA323W use 24-bit signed fractional multipliers to attenuate signals. These attenuations can also invert the phase and therefore range in value from -1 to +1. It is possible to calculate the coefficient to use for a given negative dB value (attenuation) using the equations following. non-inverting phase numbers 0 to +1: - coefficient = round(8388607 * 10(dB/20)) inverting phase numbers 0 to -1: - coefficient = 16777216 - round(8388607 * 10(dB/20)) As can be seen by the preceding equations, the value for positive phase 0 dB is 0x7FFFFF and the value for negative phase 0 dB is 0x800000. 8.6 User defined coefficient RAM 8.6.1 Coefficient address register 1 (address 0x16) 8.6.2 8.6.3 8.6.4 8.6.5 D7 D6 D5 D4 D3 D2 D1 D0 CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0 0 0 0 0 0 0 0 0 Coefficient b1data register bits 23:16 (address 0x17) D7 D6 D5 D4 D3 D2 D1 D0 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0 0 0 0 0 0 0 0 Coefficient b1data register bits 15:8 (address 0x18) D7 D6 D5 D4 D3 D2 D1 D0 C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8 0 0 0 0 0 0 0 0 Coefficient b1data register bits 7:0 (address 0x19) D7 D6 D5 D4 D3 D2 D1 D0 C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0 0 0 0 0 0 0 0 0 Coefficient b2 data register bits 23:16 (address 0x1A) D7 D6 D5 D4 D3 D2 D1 D0 C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16 0 0 0 0 0 0 0 0 DocID11535 Rev 7 65/78 78 User-programmable settings 8.6.6 8.6.7 8.6.8 8.6.9 8.6.10 8.6.11 8.6.12 66/78 STA323W Coefficient b2 data register bits 15:8 (address 0x1B) D7 D6 D5 D4 D3 D2 D1 D0 C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8 0 0 0 0 0 0 0 0 Coefficient b2 data register bits 7:0 (address 0x1C) D7 D6 D5 D4 D3 D2 D1 D0 C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0 0 0 0 0 0 0 0 0 Coefficient a1 data register bits 23:16 (address 0x1D) D7 D6 D5 D4 D3 D2 D1 D0 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0 0 0 0 0 0 0 0 Coefficient a1 data register bits 15:8 (address 0x1E) D7 D6 D5 D4 D3 D2 D1 D0 C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8 0 0 0 0 0 0 0 0 Coefficient a1 data register bits 7:0 (address 0x1F) D7 D6 D5 D4 D3 D2 D1 D0 C3B7 C3B6 C3B5 C3B4 C3B3 C3B2 C3B1 C3B0 0 0 0 0 0 0 0 0 Coefficient a2 data register bits 23:16 (address 0x20) D7 D6 D5 D4 D3 D2 D1 D0 C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16 0 0 0 0 0 0 0 0 Coefficient a2 data register bits 15:8 (address 0x21) D7 D6 D5 D4 D3 D2 D1 D0 C4B15 C4B14 C4B13 C4B12 C4B11 C4B10 C4B9 C4B8 0 0 0 0 0 0 0 0 DocID11535 Rev 7 STA323W 8.6.13 8.6.14 8.6.15 8.6.16 8.6.17 User-programmable settings Coefficient a2 data register bits 7:0 (address 0x22) D7 D6 D5 D4 D3 D2 D1 D0 C4B7 C4B6 C4B5 C4B4 C4B3 C4B2 C4B1 C4B0 0 0 0 0 0 0 0 0 Coefficient b0 data register bits 23:16 (address 0x23) D7 D6 D5 D4 D3 D2 D1 D0 C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16 0 0 0 0 0 0 0 0 Coefficient b0 data register bits 15:8 (address 0x24) D7 D6 D5 D4 D3 D2 D1 D0 C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8 0 0 0 0 0 0 0 0 Coefficient b0 data register bits 7:0 (address 0x25) D7 D6 D5 D4 D3 D2 D1 D0 C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0 0 0 0 0 0 0 0 0 Coefficient write control register (address 0x26) D7 D6 D5 D4 D3 D2 D1 D0 Reserved Reserved Reserved Reserved RA R1 WA W1 0 0 0 0 0 0 0 0 Coefficients for EQ, Mix and Scaling are handled internally in the STA323W via RAM. Access to this RAM is available to the user via an IC register interface. A collection of IC registers are dedicated to this function. The first register contains base address of the coefficient: five sets of three registers store the values of the 24-bit coefficients to be written or that were read, and one contains bits used to control the reading or writing of the coefficients to RAM. The following are instructions for reading and writing coefficients. DocID11535 Rev 7 67/78 78 User-programmable settings STA323W 8.7 Reading and writing coefficients 8.7.1 Reading a coefficient from RAM 8.7.2 1. Write 8-bits of address to IC register 0x16. 2. Write 1 to bit R1 (D2) of IC register 0x26. 3. Read top 8-bits of coefficient in IC address 0x17. 4. Read middle 8-bits of coefficient in IC address 0x18. 5. Read bottom 8-bits of coefficient in IC address 0x19. Reading a set of coefficients from RAM 1. Write 8-bits of address to IC register 0x16. 2. Write 1 to bit RA (D3) of IC register 0x26. 3. Read top 8-bits of coefficient in IC address 0x17. 4. Read middle 8-bits of coefficient in IC address 0x18. 5. Read bottom 8-bits of coefficient in IC address 0x19. 6. Read top 8-bits of coefficient b2 in IC address 0x1A. 7. Read middle 8-bits of coefficient b2 in IC address 0x1B. 8. Read bottom 8-bits of coefficient b2 in IC address 0x1C. 9. Read top 8-bits of coefficient a1 in IC address 0x1D. 10. Read middle 8-bits of coefficient a1 in IC address 0x1E. 11. Read bottom 8-bits of coefficient a1 in IC address 0x1F. 12. Read top 8-bits of coefficient a2 in IC address 0x20. 13. Read middle 8-bits of coefficient a2 in IC address 0x21. 14. Read bottom 8-bits of coefficient a2 in IC address 0x22. 15. Read top 8-bits of coefficient b0 in IC address 0x23. 16. Read middle 8-bits of coefficient b0 in IC address 0x24. 17. Read bottom 8-bits of coefficient b0 in IC address 0x25. 8.7.3 68/78 Writing a single coefficient to RAM 1. Write 8-bits of address to IC register 0x16. 2. Write top 8-bits of coefficient in IC address 0x17. 3. Write middle 8-bits of coefficient in IC address 0x18. 4. Write bottom 8-bits of coefficient in IC address 0x19. 5. Write 1 to W1 bit in IC address 0x26. DocID11535 Rev 7 STA323W 8.7.4 User-programmable settings Writing a set of coefficients to RAM 1. Write 8-bits of starting address to IC register 0x16. 2. Write top 8-bits of coefficient b1 in IC address 0x17. 3. Write middle 8-bits of coefficient b1 in IC address 0x18. 4. Write bottom 8-bits of coefficient b1 in IC address 0x19. 5. Write top 8-bits of coefficient b2 in IC address 0x1A. 6. Write middle 8-bits of coefficient b2 in IC address 0x1B. 7. Write bottom 8-bits of coefficient b2 in IC address 0x1C. 8. Write top 8-bits of coefficient a1 in IC address 0x1D. 9. Write middle 8-bits of coefficient a1 in IC address 0x1E. 10. Write bottom 8-bits of coefficient a1 in IC address 0x1F. 11. Write top 8-bits of coefficient a2 in IC address 0x20. 12. Write middle 8-bits of coefficient a2 in IC address 0x21. 13. Write bottom 8-bits of coefficient a2 in IC address 0x22. 14. Write top 8-bits of coefficient b0 in IC address 0x23. 15. Write middle 8-bits of coefficient b0 in IC address 0x24. 16. Write bottom 8-bits of coefficient b0 in IC address 0x25. 17. Write 1 to WA bit in IC address 0x26. The mechanism for writing a set of coefficients to RAM provides a method of simultaneously updating the five coefficients corresponding to a given biquad (filter) to avoid possible unpleasant acoustic side-effects. When using this technique, the 8-bit address specifies the address of the biquad b1 coefficient (for example 0, 5, 10, 15, ..., 45 decimal), and the STA323W generates the RAM addresses as an offsets from this base value to write the complete set of coefficient data. Table 70. RAM block for biquads, mixing, and scaling Index (decimal) Index (hex) Coefficient Default 0 0x00 C1H10 (b1/2) 0x000000 1 0x01 C1H11 (b2) 0x000000 2 0x02 C1H12 (a1/2) 0x000000 3 0x03 C1H13 (a2) 0x000000 4 0x04 C1H14 (b0/2) 0x400000 5 0x05 Channel 1 - biquad 2 C1H20 0x000000 ... ... ... ... ... 19 0x13 Channel 1 - biquad 4 C1H44 0x400000 20 0x14 C2H10 0x000000 C2H11 0x000000 Channel 1 - biquad 1 Channel 2 - biquad 1 21 0x15 ... ... ... ... ... 39 0x27 Channel 2 - biquad 4 C2H44 0x400000 DocID11535 Rev 7 69/78 78 User-programmable settings STA323W Table 70. RAM block for biquads, mixing, and scaling (continued) Index (decimal) Index (hex) 40 8.8 Coefficient 0x28 nd High-pass 2 -order filter For XO = 000 Default C12H0 (b1/2) 0x000000 C12H1 (b2) 0x000000 C12H2 (a1/2) 0x000000 41 0x29 42 0x2A 43 0x2B C12H3 (a2) 0x000000 44 0x2C C12H4 (b0/2) 0x400000 45 0x2D C12L0 (b1/2) 0x000000 46 0x2E 0x000000 47 0x2F Low-Pass 2nd-order filter C12L1 (b2) For XO = 000 C12L2 (a1/2) 48 0x30 C12L3 (a2) 0x000000 49 0x31 C12L4 (b0/2) 0x400000 50 0x32 Channel 1 - post scale C1PreS 0x7FFFFF 51 0x33 Channel 2 - post scale C2PreS 0x7FFFFF 52 0x34 Channel 1 - post scale C1PstS 0x7FFFFF 53 0x35 Channel 2 - post scale C2PstS 0x7FFFFF 54 0x36 Channel 3 - post scale C3PstS 0x7FFFFF 55 0x37 Thermal warning - post scale TWPstS 0x5A9DF7 56 0x38 Channel 1 - mix 1 C1MX1 0x7FFFFF 57 0x39 Channel 1 - mix 2 C1MX2 0x000000 58 0x3A Channel 2 - mix 1 C2MX1 0x000000 59 0x3B Channel 2 - mix 2 C2MX2 0x7FFFFF 60 0x3C Channel 3 - mix 1 C3MX1 0x400000 61 0x3D Channel 3 - mix 2 C3MX2 0x400000 62 0x3E Unused 63 0x3F Unused 0x000000 Variable max power correction (address 0x27-0x28) The MPCC bits determine the 16 MSBs of the MPC compensation coefficient. This coefficient is used in place of the default coefficient when MPCV = 1. 70/78 D7 D6 D5 D4 D3 D2 D1 D0 MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8 0 0 1 0 1 1 0 1 MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0 1 1 0 0 0 0 0 0 DocID11535 Rev 7 STA323W 8.9 User-programmable settings Fault detect recovery (address 0x2B - 0x2C) FDRC bits specify the 16-bit fault detect recovery time delay. When FAULT is active, the TRISTATE output immediately goes low and is held low for the time period specified by this constant. A constant value of 0x0001 in this register is approximately 0.083 ms. The default value of 0x000C specifies approximately 0.1 ms. 8.10 D7 D6 D5 D4 D3 D2 D1 D0 FRDC15 FDRC14 FDRC13 FDRC12 FDRC11 FDRC10 FDRC9 FDRC8 0 0 0 0 0 0 0 0 FDRC7 FDRC6 FDRC5 FDRC4 FDRC3 FDRC2 FDRC1 FDRC0 0 0 0 0 1 1 0 0 Status indicator register (address 0x2D) D7 D6 D5 D4 D3 D2 D1 D0 PLULL Reserved Reserved Reserved Reserved Reserved FAULT TWARN 0 0 0 0 0 0 1 1 STATUS register bits serve the purpose of communicating the detected error or warning condition to the user. This is a read-only register and writing to this register would not be of any consequence. 8.10.1 Thermal warning indicator Table 71. Thermal warning indicator Bit 0 R/W RO RST 1 Name Description 0: thermal warning detected 1: normal operation (no thermal warning) RWRAN If the power stage thermal operating conditions are exceeded, the thermal warning indicator transmits a signal to the digital logic block to initiate a corrective procedure. This register bit is set to 0 to indicate a thermal warning and it reverts back to its default state as soon as the cause of the thermal warning has been corrected. 8.10.2 Fault detect indicator Table 72. Fault detect indicator Bit 1 R/W RO RST 1 Name FAULT Description 0: fault issued from the power stage 1: normal operation (no fault) As soon as the power stage issues a Fault error signal, thereby initiating the Fault recovery procedure described in Section 8.9, this register bit is set to 0 to indicate the error to the user. As soon as the fault condition (over-current or thermal) is corrected, this bit is reset back to its default state. DocID11535 Rev 7 71/78 78 User-programmable settings 8.10.3 STA323W PLL unlock indicator Table 73. PLL unlock indicator Bit 7 R/W RO RST 0 Name PLLUL Description 0: normal operation (PLL is in a locked state) 1: PLL unlock is detected (due to probable clock loss) Under normal conditions (with the correct clock) the PLL is locked into an internal clocking frequency. However, if the clock is insufficient or if it is abruptly lost, the PLL lock state is lost and this information is relayed to the user via setting the PLLUL bit of the Status register to 1. As soon as the PLL reverts back to a locked state, this bit is set to 0. 72/78 DocID11535 Rev 7 STA323W 9 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark. DocID11535 Rev 7 73/78 78 Package information STA323W Figure 51. PowerSO-36 slug down outline drawing 0096119 rev D URE 1: 74/78 DocID11535 Rev 7 STA323W Package information Table 74. PowerSO-36 slug down dimensions mm inch Symbol Min. Typ. Max. Min. Typ. Max. A - - 3.60 - - 0.142 a1 0.10 - 0.30 .004 - .012 a2 - - 3.30 - - 0.130 a3 0 - 0.10 0 - .004 b 0.22 - 0.38 0.009 - 0.015 c 0.23 - 0.32 0.009 - 0.013 D 15.80 - 16.00 0.622 - 0.630 D1 9.40 - 9.80 0.370 - 0.386 E 13.90 - 14.50 0.547 - 0.571 E1 10.90 - 11.10 0.429 - 0.437 E2 - - 2.90 - - 0.114 E3 5.80 - 6.20 0.228 - 0.244 e - 0.65 - - 0.026 - e3 - 11.05 - - 0.435 - G 0 - 0.10 0 - 0.004 H 15.50 - 15.90 0.610 - 0.626 h - - 1.10 - - 0.043 L 0.80 - 1.10 0.031 - 0.043 M 2.25 - 2.60 0.089 - 0.102 N - - 10 degrees - - 10 degrees R - 0.30 - - 0.012 - s - - 8 degrees - - 8 degrees DocID11535 Rev 7 75/78 78 Trademarks and other acknowledgements 10 Trademarks and other acknowledgements DDX is a registered trademark of Apogee Technology Inc. AutoModes is a trademark of Apogee Technology Inc. ECOPACK is a registered trademark of STMicroelectronics. 76/78 DocID11535 Rev 7 STA323W STA323W 11 Revision history Revision history Table 75. Document revision history Date Revision Changes 01-Jul-2005 1 Initial release. 02-Jan-2006 2 Modified configuration Register A (addr 0x00). 02-Feb-2006 3 Modified the ordering part numbers. 08-Jun-2006 4 Added new chapters. Updated Electrical characteristics curves Modified the minimum value of Vcc parameter. 15-Nov-2006 5 Update into latest template. 22-May-2008 6 Updated pin 1 connection. General presentation revision. 13-Feb-2014 7 Updated order code Table 1 on page 1. DocID11535 Rev 7 77/78 78 STA323W Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. 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The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. (c) 2014 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 78/78 DocID11535 Rev 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: STMicroelectronics: STA323W13TR