October 2009 Doc ID 13855 Rev 4 1/67
67
STA309A
Multi-channel digital audio processor with DDX®
Features
8 channels of 24-bit DDX® (direct digital
amplification)
>100 dB of SNR and dynamic range
Selectable 32 kHz - 192 kHz input sample rates
6 channels of DSD/SACD input
Digital gain/attenuation +58 dB to -100 dB in
0.5-dB steps
Soft volume update
Individual channel and master gain/attenuation
plus channel trim (-10 dB to +10 dB)
Up to 10 independent 32-bit user
programmable biquads (EQ) per channel
Bass/treble tone control
Pre and post EQ full 8-channel input mix on all
8 channels
Dual independent limiters/compressors
Dynamic range compression
Automode™:
– 5-band graphic EQ
– 32 preset EQ curves (rock, jazz, pop, etc.)
– Automatic volume controlled loudness
– 5.1 to 2-channel downmix
– Simultaneous 5.1- and 2-channel downmix
outputs
– 3 preset volume curves
– 2 preset anti-clipping modes
– Preset movie nighttime listening mode
– Preset TV channel/commercial AGC mode
– 5.1, 2.1 bass management configurations
– 8 preset crossover filters
Individual channel and master soft/hard mute
Automatic zero-detect and invalid input mute
Automatic invalid input detect mute
Advanced PopFree operation
Advanced AM interference frequency
switching and noise suppression modes
I2S output channel mapping function
Independent channel volume and DSP bypass
Channel mapping of any input to any
processing/DDX® channel
DC blocking selectable high-pass filter
Selectable per-channel DDX® damped ternary
or binary PWM output
Max power correction for lower full-power THD
Variable per channel DDX® o
utput delay control
192 kHz internal processing sample rate, 24-bit
to 36-bit precision
Description
The STA309A is a single chip solution for digital
audio processing and control in multi-channel
applications. It provides output capabilities for
DDX®. In conjunction with a DDX® power device,
the STA309A provides high-quality,
high-efficiency, all digital amplification. The device
is extremely versatile, allowing inputs of most
digital formats including 6.1/7.1-channel and
192 kHz, 24-bit DVD-audio, DSD/SACD. In 5.1
applications the additional 2 channels can be
used for audio line-out or headphone drive. In
speaker mode, with 8 channel outputs in parallel,
the STA309A can deliver more than 1 W.
Table 1. Device summary
Order code Package
STA309A TQFP64
STA309A13TR TQFP64
TQFP64
www.st.com
Contents STA309A
2/67 Doc ID 13855 Rev 4
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Recommended operating condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5I
2C bus operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.1 Data transition or change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.2 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.3 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.4 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3.1 Byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3.2 Multi-byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Application reference schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1 Register summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2.1 Configuration register A (0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2.2 Configuration register B (0x01) - serial input formats . . . . . . . . . . . . . . 24
7.2.3 Configuration register C (0x02) - serial output formats . . . . . . . . . . . . . 26
7.2.4 Configuration register D (0x03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2.5 Configuration register E (0x04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2.6 Configuration register F (0x05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
STA309A Contents
Doc ID 13855 Rev 4 3/67
7.2.7 Configuration register G (0x06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.8 Configuration register H (0x07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.2.9 Configuration register I (0x08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.10 Master mute register (0x09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.11 Master volume register (0x0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.12 Channel 1 volume (0x0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.13 Channel 2 volume (0x0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.14 Channel 3 volume (0x0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.15 Channel 4 volume (0x0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.16 Channel 5 volume (0x0F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2.17 Channel 6 volume (0x10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2.18 Channel 7 volume (0x11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2.19 Channel 8 volume (0x12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2.20 Channel 1 volume trim, mute, bypass (0x13) . . . . . . . . . . . . . . . . . . . . 35
7.2.21 Channel 2 volume trim, mute, bypass (0x14) . . . . . . . . . . . . . . . . . . . . 35
7.2.22 Channel 3 volume trim, mute, bypass (0x15) . . . . . . . . . . . . . . . . . . . . 35
7.2.23 Channel 4 volume trim, mute, bypass (0x16) . . . . . . . . . . . . . . . . . . . . 36
7.2.24 Channel 5 volume trim, mute, bypass (0x17) . . . . . . . . . . . . . . . . . . . . 36
7.2.25 Channel 6 volume trim, mute, bypass (0x18) . . . . . . . . . . . . . . . . . . . . 36
7.2.26 Channel 7 volume trim, mute, bypass (0x19) . . . . . . . . . . . . . . . . . . . . 36
7.2.27 Channel 8 volume trim, mute, bypass (0x1A) . . . . . . . . . . . . . . . . . . . . 36
7.2.28 Channel input mapping channels 1 and 2 (0x1B) . . . . . . . . . . . . . . . . . 38
7.2.29 Channel input mapping channels 3 and 4 (0x1C) . . . . . . . . . . . . . . . . . 38
7.2.30 Channel input mapping channels 5 and 6 (0x1D) . . . . . . . . . . . . . . . . . 38
7.2.31 Channel input mapping channels 7 and 8 (0x1E) . . . . . . . . . . . . . . . . . 38
7.2.32 AUTO1 - Automode™ EQ, volume, GC (0x1F) . . . . . . . . . . . . . . . . . . . 39
7.2.33 AUTO2 - Automode™ bass management2 (0x20) . . . . . . . . . . . . . . . . 40
7.2.34 AUTO3 - Automode™ AM/prescale/bass management scale (0x21) . . 41
7.2.35 PREEQ - Preset EQ settings (0x22) . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.36 AGEQ - graphic EQ 80-Hz band (0x23) . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.37 BGEQ - graphic EQ 300-Hz band (0x24) . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.38 CGEQ - graphic EQ 1-kHz band (0x25) . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.39 DGEQ - graphic EQ 3-kHz band (0x26) . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.40 EGEQ - graphic EQ 8-kHz band (0x27) . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.41 Biquad internal channel loop-through (0x28) . . . . . . . . . . . . . . . . . . . . . 45
7.2.42 Mix internal channel loop-through (0x29) . . . . . . . . . . . . . . . . . . . . . . . 45
7.2.43 EQ bypass (0x2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Contents STA309A
4/67 Doc ID 13855 Rev 4
7.2.44 Tone control bypass (0x2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.45 Tone control (0x2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.2.46 Channel limiter select channels 1,2,3,4 (0x2D) . . . . . . . . . . . . . . . . . . . 47
7.2.47 Channel limiter select channels 5,6,7,8 (0x2E) . . . . . . . . . . . . . . . . . . . 47
7.2.48 Limiter 1 attack/release rate (0x2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.2.49 Limiter 1 attack/release threshold (0x30) . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.50 Limiter 2 attack/release rate (0x31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.51 Limiter 2 attack/release threshold (0x32) . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.52 Bit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.53 Channel 1 and 2 output timing (0x33) . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.54 Channel 3 and 4 output timing (0x34) . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.55 Channel 5 and 6 output timing (0x35) . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.56 Channel 7 and 8 output timing (0x36) . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.57 Channel I2S output mapping channels 1 and 2 (0x37) . . . . . . . . . . . . . 54
7.2.58 Channel I2S output mapping channels 3 and 4 (0x38) . . . . . . . . . . . . . 54
7.2.59 Channel I2S output mapping channels 5 and 6 (0x39) . . . . . . . . . . . . . 54
7.2.60 Channel I2S output mapping channels 7 and 8 (0x3A) . . . . . . . . . . . . . 54
7.2.61 Coefficient address register 1 (0x3B) . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2.62 Coefficient address register 2 (0x3C) . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2.63 Coefficient b1 data register, bits 23:16 (0x3D) . . . . . . . . . . . . . . . . . . . . 55
7.2.64 Coefficient b1 data register, bits 15:8 (0x3E) . . . . . . . . . . . . . . . . . . . . . 55
7.2.65 Coefficient b1 data register, bits 7:0 (0x3F) . . . . . . . . . . . . . . . . . . . . . . 55
7.2.66 Coefficient b2 data register, bits 23:16 (0x40) . . . . . . . . . . . . . . . . . . . . 55
7.2.67 Coefficient b2 data register, bits 15:8 (0x41) . . . . . . . . . . . . . . . . . . . . . 55
7.2.68 Coefficient b2 data register, bits 7:0 (0x42) . . . . . . . . . . . . . . . . . . . . . . 56
7.2.69 Coefficient a1 data register, bits 23:16 (0x43) . . . . . . . . . . . . . . . . . . . . 56
7.2.70 Coefficient a1 data register, bits 15:8 (0x44) . . . . . . . . . . . . . . . . . . . . . 56
7.2.71 Coefficient a1 data register, bits 7:0 (0x45) . . . . . . . . . . . . . . . . . . . . . . 56
7.2.72 Coefficient a2 data register, bits 23:16 (0x46) . . . . . . . . . . . . . . . . . . . . 56
7.2.73 Coefficient a2 data register, bits 15:8 (0x47) . . . . . . . . . . . . . . . . . . . . . 56
7.2.74 Coefficient a2 data register, bits 7:0 (0x48) . . . . . . . . . . . . . . . . . . . . . . 56
7.2.75 Coefficient b0 data register, bits 23:16 (0x49) . . . . . . . . . . . . . . . . . . . . 56
7.2.76 Coefficient b0 data register, bits 15:8 (0x4A) . . . . . . . . . . . . . . . . . . . . . 57
7.2.77 Coefficient b0 data register, bits 7:0 (0x4B) . . . . . . . . . . . . . . . . . . . . . . 57
7.2.78 Coefficient write control register (0x4C) . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.3 Reading a coefficient from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.4 Reading a set of coefficients from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . 58
STA309A Contents
Doc ID 13855 Rev 4 5/67
7.5 Writing a single coefficient to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.6 Writing a set of coefficients to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8 Equalization and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.1 Postscale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.2 Variable max power correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.2.1 MPCC1-2 (0x4D, 0x4E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.3 Variable distortion compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.3.1 DCC1-2 (0x4F, 0x50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.4 PSCorrect registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.4.1 PSC1-2: ripple correction value (RCV) (0x51, 0x52) . . . . . . . . . . . . . . . 63
8.4.2 PSC3: correction normalization value (CNV) (0x53) . . . . . . . . . . . . . . . 63
9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10 Trademarks and other acknowledgements . . . . . . . . . . . . . . . . . . . . . . 65
11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
List of tables STA309A
6/67 Doc ID 13855 Rev 4
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 5. Recommended operating condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6. General interface electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7. DC electrical characteristics: 3.3-V buffers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 8. Register summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 9. MSC bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 10. MSC sample rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 11. Interpolation ratio bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 12. IR sample rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 13. DSPB bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 14. COS bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 15. SAI bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 16. SAIFB bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 17. SAI and SAIFB serial clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 18. SAO bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 19. SAOFB bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 20. SAO serial clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 21. OM bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 22. Output stage mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 23. CSZ bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 24. CSZ definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 25. MPC bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 26. CnBO bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 27. HPB bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 28. DRC bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 29. DEMP bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 30. PSL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 31. BQL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 32. PWMS bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 33. PWM output speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 34. Register G bit definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 35. AM2E bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 36. HPE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 37. DCCV bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 38. MPCV bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 39. NSBW bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 40. ZCE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 41. SVE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 42. ZDE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 43. IDE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 44. BCLE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 45. LDTE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 46. ECLE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 47. PSCE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 48. EAPD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
STA309A List of tables
Doc ID 13855 Rev 4 7/67
Table 49. MV bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 50. CnV bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 51. CnVT bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 52. CnIM bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 53. AMEQ bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 54. AMV bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 55. AMDM bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 56. AMBMME bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 57. AMBMXE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 58. CSS and RSS bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 59. FSS and SUB bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 60. AMPS bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 61. MSA bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 62. AMAME bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 63. AMAM bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 64. XO bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 65. PEQ bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 66. xGEQ bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 67. CnBLP bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 68. CnMXLP bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 69. CnEQBP bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 70. BTC and TTC bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 71. Channel limiter mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 72. Attack rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 73. Release rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 74. LnAT bits, anti-clipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 75. LnRT bits, anti-clipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 76. LnAT bits, dynamic range compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 77. LnRT bits, dynamic range compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 78. PWM slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 79. CnOM serial output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 80. RAM block for biquads, mixing, and bass management. . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 81. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
List of figures STA309A
8/67 Doc ID 13855 Rev 4
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2. Channel signal flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4. Write mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5. Read mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6. Reference schematic for STA309A-based application . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 7. Basic limiter and volume flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 8. Channel mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 9. TQFP64 (10 x 10 x 1.4 mm) package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
STA309A Block diagram
Doc ID 13855 Rev 4 9/67
1 Block diagram
Figure 1. Block diagram
Figure 2. Channel signal flow
OUT1A/B
OUT2A/B
OUT3A/B
OUT4A/B
OUT5A/B
OUT6A/B
OUT7A/B
OUT8A/B
LRCKI
BICKI
SDI12
SDI34
SDI56
SDI78
SA
SERIAL
DATA
IN
I
2
C
CHANNEL
MAPPING
VARIABLE
OVER-
SAMPLING
TREBLE,
BASS, EQ
(
BIQUADS
)
VOLUME
LIMITING
SDO78
SDO12
SDO34
SDO56
OVERSAMPLING
VARIABLE
DOWN-
SAMPLING
POWER
DOWN
PWDN EAPD
PLL
PLLB
XTI CKOUT
SCL SDA
LRCKO
BICKO
MVO
SERIAL
DATA
OUT
SYSTEM
CONTROL
SYSTEM TIMING
DDX
1x,2x,4x
Interp
Biq uads
B/T
Volume
Limiter
2x
Interp
Distortion
Compensation
NS C_Con PWM
DDX
Output
Interp_Rate
8 Inputs
From I2S
DSD
Conversion
6 Inputs
From DSD
Mapping/
Mix #1
DSDE
Mix #2
PreScale High - Pa s s
Filter
Bi qu a d
#2
Biquad
#3
Biquad
#4
Biq u a d
#5
Biquad
#6
Biquad
#7
Biquad
#8 Ba s s
Hard Set to
-18dB when
AutoMode EQ
(AMEQ)
Hard Set Coeffecients when AutoMode EQ
(AMEQ)
Hard S e t
Coeffec ients w hen
Aut oMode
Bass Management
Cross over
(AMBMXE)
Har d S e t
Coeffec ients when
DeEmphasis
Enabled
(DEMP)
From
Mix#1
Engine
Or
Previous
Channel
Bi qu a d # 1 0
Output
(CxBLP)
To
Mix#2
Engine
Treble
User Progammable
Biquad #1 when
High-Pass Bypassed
(HPB)
User Programmable
Biquads #9 and #10
When Tone Bypassed
(CxTCB)
Pin connections STA309A
10/67 Doc ID 13855 Rev 4
2 Pin connections
Figure 3. Pin connection (top view)
Table 2. Pin description
Pin Type Name Description
1 5-V tolerant TTL input buffer MVO/DSD_CLK Master volume override/
DSD input clock
6 5-V tolerant TTL input buffer SDI_78/DSD_6 Input serial data channels 7 & 8/
DSD input channel 6
7 5-V tolerant TTL input buffer SDI_56/DSD_5 Input serial data channels 5 & 6/
DSD input channel 5
8 5-V tolerant TTL input buffer SDI_34/DSD_4 Input serial data channels 3 & 4/
DSD input channel 4
9 5-V tolerant TTL input buffer SDI_12/DSD_3 Input serial data channels 1 & 2/
DSD input channel 3
10 5-V tolerant TTL input buffer LRCKI/DSD_2 Input left/right clock/
DSD input channel 2
11 5-V tolerant TTL input buffer BICKI/DSD_1 Input serial clock/
DSD input channel 1
15 5-V tolerant TTL schmitt
trigger input buffer RESET Global reset
16 CMOS input buffer with
pull-down PLL_BYPASS Bypass phase locked loop
1
2
3
5
6
4
7
8
9
10
27
11
28 29 30 31 32
59 58 57 56 54
55 53 52 51 50 49
43
42
41
39
38
40
48
47
46
44
45
SDI_78
NC
GND
GND
MVO
VDD
BICKI
LRCKI
SDI_12
SDI_56
SDI_34
NC
GNDA
VDDA
CKOUT
GND
NC
VDD
OUT8_B
OUT8_A
OUT7_B
OUT7_A
VDD
SDO_34
SDO_12
LRCKO
NC
BICKO
GND
VDD
EAPD
OUT1_A
OUT1_B
OUT3_A
OUT3_B
OUT4_A
OUT5_A
OUT5_B
OUT4_B
OUT2_A
OUT2_B
NC
VDD
GND
STA308APINCON
22 23 24 25 26
60
GND
61
NC
62
SDO_56
63
SDO_78
64
PWDN
SA
SDA
SCL
XTI
FILTER_PLL
17 18 19 20 21
37
36
34
33
35
NC
GND
OUT6_A
OUT6_B
VDD
12
13
14
15
16
PLLB
RESET
NC
VDD
GND
STA309A Pin connections
Doc ID 13855 Rev 4 11/67
17 CMOS input buffer with
pull-down SA Select address (I2C)
18
Bidirectional buffer: 5-V
tolerant TTL schmitt trigger
input; 3.3-V capable 2mA
slew-rate controlled output.
SDA Serial data (I2C)
19 5-V tolerant TTL schmitt
trigger input buffer SCL Serial clock (I2C)
20 5-V tolerant TTL schmitt
trigger input buffer XTI Crystal oscillator input (clock input)
21 Analog pad FILTER_PLL PLL filter
23 Analog ground GNDA PLL ground
24 3.3V analog supply voltage VDDA PLL supply
25 3.3-V capable TTL tristate
4mA output buffer CKOUT Clock output
29 3.3-V capable TTL 16mA
output buffer OUT8B PWM channel 8 output B
30 3.3-V capable TTL 16mA
output buffer OUT8A PWM channel 8 output A
31 3.3-V capable TTL 16mA
output buffer OUT7B PWM channel 7 output B
32 3.3-V capable TTL 16mA
output buffer OUT7A PWM channel 7 output A
33 3.3-V capable TTL 16mA
output buffer OUT6B PWM channel 6 output B
34 3.3-V capable TTL 16mA
output buffer OUT6A PWM channel 6 output A
38 3.3-V capable TTL 16mA
output buffer OUT5B PWM channel 5 output B
39 3.3-V capable TTL 16mA
output buffer OUT5A PWM channel 5 output A
40 3.3-V capable TTL 16mA
output buffer OUT4B PWM channel 4 output B
41 3.3-V capable TTL 16mA
output buffer OUT4A PWM channel 4 output A
42 3.3-V capable TTL 16mA
output buffer OUT3B PWM channel 3 output B
43 3.3-V capable TTL 16mA
output buffer OUT3A PWM channel 3 output A
47 3.3-V capable TTL 16mA
output buffer OUT2B PWM channel 2 output B
Table 2. Pin description (continued)
Pin Type Name Description
Pin connections STA309A
12/67 Doc ID 13855 Rev 4
48 3.3-V capable TTL 16mA
output buffer OUT2A PWM channel 2 output A
49 3.3-V capable TTL 16mA
output buffer OUT1B PWM channel 1 output B
50 3.3-V capable TTL 16mA
output buffer OUT1A PWM channel 1 output A
51 3.3-V capable TTL 4mA
output buffer EAPD Ext. amp power-down
55 3.3-V capable TTL 2mA
output buffer BICKO Output serial clock
56 3.3-V capable TTL 2mA
output buffer LRCKO Output left/right clock
57 3.3-V capable TTL 2mA
output buffer SDO_12 Output serial data channels 1&2
58 3.3-V capable TTL 2mA
output buffer SDO_34 Output serial data channels 3&4
62 3.3-V capable TTL 2mA
output buffer SDO_56 Output serial data channels 5&6
63 3.3-V capable TTL 2mA
output buffer SDO_78 Output serial data channels 7&8
64 5-V tolerant TTL schmitt
trigger input buffer PWDN Device power-down
3,12,28,35,
44,52,59 3.3-V digital supply voltage VDD 3.3-V supply
2,4,13,27,
36,45,53,60 Digital ground GND Ground
5, 14, 22,
26,37,46,54,
61
- NC No internal connection
Table 2. Pin description (continued)
Pin Type Name Description
STA309A Electrical specification
Doc ID 13855 Rev 4 13/67
3 Electrical specification
3.1 Absolute maximum ratings
3.2 Thermal data
3.3 Recommended operating condition
Table 3. Absolute maximum ratings
Symbol Parameter Min Typ Max Unit
VDD 3.3-V I/O power supply, pin VDD -0.5 - 4 V
VDDA 3.3-V logic power supply, pin VDDA -0.5 - 4 V
ViVoltage on input pins -0.5 - VDD +
0.5 V
VoVoltage on output pins -0.5 - VDD +
0.3 V
Tstg Storage temperature -40 - 150 °C
Tamb Ambient operating temperature -40 - 90 °C
Table 4. Thermal data
Symbol Parameter Min Typ Max Unit
Rthj-amb Thermal resistance, junction to ambient - 85 - °C/W
Table 5. Recommended operating condition
Symbol Parameter Min Typ Max Unit
VDD I/O power supply, pin VDD 3.0 - 3.6 V
VDDA Logic power supply, pin VDDA 3.0 - 3.6 V
TjOperating junction temperature -40 - 125 °C
Electrical specification STA309A
14/67 Doc ID 13855 Rev 4
3.4 Electrical specifications
The following specifications are valid for VDD = 3.3 V ± 0.3 V, VDDA = 3.3 V ± 0.3 V and
Tamb = 0 to 70 °C, unless otherwise stated
Table 6. General interface electrical specifications
Symbol Parameter Conditions Min Typ Max Unit
Iil Low-level input no pull-up Vi = 0V --1 (1)
1. The leakage currents are generally very small, < 1 nA. The values given here are maximum after an
electrostatic stress on the pin.
µA
Iih
High-level input no
pull-down Vi = VDD --2µA
IOZ
Tristate output leakage
without pull-up/down Vi = VDD --2µA
Vesd
Electrostatic protection
(human body model) Leakage < 1µA 2000--V
Table 7. DC electrical characteristics: 3.3-V buffers
Symbol Parameter Conditions Min Typ Max Unit
VIL Low-level input voltage - - - 0.8 V
VIH High-level input voltage - 2.0 - - V
VILhyst Low-level threshold Input falling 0.8 - 1.35 V
VIHhyst High-level threshold Input rising 1.3 - 2.0 V
Vhyst Schmitt trigger hysteresis - 0.3 - 0.8 V
VOL Low-level output IOL = 100uA - - 0.2 V
VOH High-level output IOH = -100uA VDD -
0.2 --V
IOH = -2mA 2.4 - - V
STA309A Pin description
Doc ID 13855 Rev 4 15/67
4 Pin description
Master volume override (MVO)
This pin enables the user to bypass the volume control on all channels. When MVO is pulled
high, the master volume register is set to 0x00, which corresponds to its full scale setting.
The master volume register setting offsets the individual channel volume settings, which
default to 0 dB.
Serial data in (SDI_12, SDI_34, SDI_56, SDI_78)
Audio information enters the device here. Six format choices are available including I2S,
left- or right-justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
RESET
Driving this pin low turns off the outputs and returns all settings to their defaults.
I
2
C bus
The SA, SDA and SCL pins operate per the Phillips I2C specification. See Section 5.
Phase locked loop (PLL)
The phase locked loop section provides the system timing signals and CKOUT.
Clock output (CKOUT)
System synchronization and master clocks are provided by the CKOUT.
PWM outputs (OUT1 through OUT8)
The PWM outputs provide the input signal for the power devices.
External amplifier power-down (EAPD)
This signal can be used to control the power-down of DDX power devices.
Serial data out (SDO_12, SDO_34, SDO_56, SDO_78)
These are the outputs for audio information. Six different formats are available including I2S,
left- or right-justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
Device power-down (PWDN)
Pulling PWDN low begins the power-down sequence which puts the STA309A into a
low-power state. EAPD (pin 51) goes low approximately 30 ms later.
I2C bus operation STA309A
16/67 Doc ID 13855 Rev 4
5 I2C bus operation
The STA309A supports the I2C protocol via the input ports SCL and SDA_IN (master to
slave) and the output port SDA_OUT (slave to master).
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
STA309A is always a slave device in all of its communications.
5.1 Communication protocol
5.1.1 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.
5.1.2 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.
5.1.3 Stop condition
STOP is identified by 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
STA309A and the bus master.
5.1.4 Data input
During the data input the STA309A 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.
5.2 Device addressing
To start communication between the master and the Omega DDX core, the master must
initiate with a start condition. Following this, the master sends 8 bits onto the SDA line (MSB
first) corresponding to the device select address and read or write mode.
The 7 most significant bits are the device address identifiers, corresponding to the I2C bus
definition. In the STA309A the I2C interface has two device addresses depending on the SA
port configuration, 0x40 or 0100000x when SA = 0, and 0x42 or 0100001x when SA = 1.
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 STA309A identifies on the bus the device
STA309A I2C bus operation
Doc ID 13855 Rev 4 17/67
address and if a match is found, it acknowledges the identification on SDA bus during the
9th-bit time. The byte following the device identification byte is the internal space address.
5.3 Write operation
Following the START condition the master sends a device select code with the RW bit set
to 0. The STA309A acknowledges this and the writes for the byte of internal address.
After receiving the internal byte address the STA309A again responds with an
acknowledgement.
5.3.1 Byte write
In the byte write mode the master sends one data byte, this is acknowledged by the Omega
DDX core. The master then terminates the transfer by generating a STOP condition.
5.3.2 Multi-byte write
The multi-byte write modes can start from any internal address. The master generating a
STOP condition terminates the transfer.
Figure 4. Write mode sequence
Figure 5. Read mode sequence
DEV-ADDR
ACK
START RW
SUB-ADDR
ACK
DATA IN
A
CK
STOP
BYTE
WRITE
DEV-ADDR
ACK
START RW
SUB-ADDR
ACK
DATA IN
A
CK
STOP
MULTIBYTE
WRITE
DATA IN
A
CK
DEV-ADDR
ACK
START RW
DATA
NO ACK
STOP
CURRENT
ADDRESS
READ
DEV-ADDR
ACK
START RW
SUB-ADDR
ACK
DEV-ADDR
A
CK
STOP
RANDOM
ADDRESS
READ
DATA
NO
A
CK
START RW
DEV-ADDR
ACK
START
DATA
ACK
DATA
ACK
STOP
SEQUENTIAL
CURRENT
READ
DATA
NO
A
CK
DEV-ADDR
ACK
START RW
SUB-ADDR
ACK
DEV-ADDR
A
CK
SEQUENTIAL
RANDOM
READ
DATA
A
CK
START RW
DATA
A
CK NO
A
CK
STOP
DATA
RW=
HIGH
Application reference schematic STA309A
18/67 Doc ID 13855 Rev 4
6 Application reference schematic
Figure 6. Reference schematic for STA309A-based application
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The PLL filter must be placed as close
as possible to the STA309A pins
STA309A Registers
Doc ID 13855 Rev 4 19/67
7 Registers
7.1 Register summary
Table 8. Register summary
Addr Name D7 D6 D5 D4 D3 D2 D1 D0
Configuration
0x00 CONFA COS1 COS0 DSPB IR1 IR0 MCS2 MCS1 MCS0
0x01 CONFB Reserved SAIFB SAI3 SAI2 SAI1 SAI0
0x02 CONFC Reserved SAOFB SAO3 SAO2 SAO1 SAO0
0x03 CONFD MPC CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0
0x04 CONFE C8BO C7BO C6BO C5BO C4BO C3BO C2BO C1BO
0x05 CONFF PWMS2 PWMS1 PWMS0 BQL PSL DEMP DRC HPB
0x06 CONFG MPCV DCCV HPE AM2E AME COD SID PWMD
0x07 CONFH ECLE LDTE BCLE IDE ZDE SVE ZCE NSBW
0x08 CONFI EAPD Reserved PSCE
Volume control
0x09 MMUTE Reserved MMUTE
0x0A MVOL MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0
0x0B C1VOL C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0
0x0C C2VOL C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0
0x0D C3VOL C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0
0x0E C4VOL C4V7 C4V6 C4V5 C4V4 C4V3 C4V2 C4V1 C4V0
0x0F C5VOL C5V7 C5V6 C5V5 C5V4 C5V3 C5V2 C5V1 C5V0
0x10 C6VOL C6V7 C6V6 C6V5 C6V4 C6V3 C6V2 C6V1 C6V0
0x11 C7VOL C7V7 C7V6 C7V5 C7V4 C7V3 C7V2 C7V1 C7V0
0x12 C8VOL C8V7 C8V6 C8V5 C8V4 C8V3 C8V2 C8V1 C8V0
0x13 C1VTMB C1M C1VBP Reserved C1VT4 C1VT3 C1VT2 C1VT1 C1VT0
0x14 C2VTMB C2M C2VBP Reserved C2VT4 C2VT3 C2VT2 C2VT1 C2VT0
0x15 C3VTMB C3M C3VBP Reserved C3VT4 C3VT3 C3VT2 C3VT1 C3VT0
0x16 C4VTMB C4M C4VBP Reserved C4VT4 C4VT3 C4VT2 C4VT1 C4VT0
0x17 C5VTMB C5M C5VBP Reserved C5VT4 C5VT3 C5VT2 C5VT1 C5VT0
0x18 C6VTMB C6M C6VBP Reserved C6VT4 C6VT3 C6VT2 C6VT1 C6VT0
0x19 C7VTMB C7M C7VBP Reserved C7VT4 C7VT3 C7VT2 C7VT1 C7VT0
0x1A C8VTMB C8M C8VBP Reserved C8VT4 C8VT3 C8VT2 C8VT1 C8VT0
Input mapping
0x1B C12IM Reserved C2IM2 C2IM1 C2IM0 Reserved C1IM2 C1IM1 C1IM0
Registers STA309A
20/67 Doc ID 13855 Rev 4
0x1C C34IM Reserved C4IM2 C4IM1 C4IM0 Reserved C3IM2 C3IM1 C3IM0
0x1D C56IM Reserved C6IM2 C6IM1 C6IM0 Reserved C5IM2 C5IM1 C5IM0
0x1E C78IM Reserved C8IM2 C8IM1 C8IM0 Reserved C7IM2 C7IM1 C7IM0
Automode™
0x1F AUTO1 AMDM AMGC2 AMGC1 AMGC0 AMV1 AMV0 AMEQ1 AMEQ0
0x20 AUTO2 SUB RSS1 RSS0 CSS1 CSS0 FSS AMBMXE AMBMME
0x21 AUTO3 AMAM2 AMAM1 AMAM0 AMAME Reserved MSA AMPS
0x22 PREEQ XO2 XO1 XO0 PEQ4 PEQ3 PEQ2 PEQ1 PEQ0
0x23 AGEQ Reserved AGEQ4 AGEQ3 AGEQ2 AGEQ1 AGEQ0
0x24 BGEQ Reserved BGEQ4 BGEQ3 BGEQ2 BGEQ1 BGEQ0
0x25 CGEQ Reserved CGEQ4 CGEQ3 CGEQ2 CGEQ1 CGEQ0
0x26 DGEQ Reserved DGEQ4 DGEQ3 DGEQ2 DGEQ1 DGEQ0
0x27 EGEQ Reserved EGEQ4 EGEQ3 EGEQ2 EGEQ1 EGEQ0
Processing loop
0x28 BQLP C8BLP C7BLP C6BLP C5BLP C4BLP C3BLP C2BLP C1BLP
0x29 MXLP C8MXLP C7MXLP C6MXLP C5MXLP C4MXLP C3MXLP C2MXLP C1MXLP
Processing bypass
0x2A EQBP C8EQBP C7EQBP C6EQBP C5EQBP C4EQBP C3EQBP C2EQBP C1EQBP
0x2B TONEBP C8TCB C7TCB C6TCB C5TCB C4TCB C3TCB C2TCB C1TCB
Tone control
0x2C TONE TTC3 TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0
Dynamics control
0x2D C1234LS C4LS1 C4LS0 C3LS1 C3LS0 C2LS1 C2LS0 C1LS1 C1LS0
0x2E C5678LS C8LS1 C8LS0 C7LS1 C7LS0 C6LS1 C6LS0 C5LS1 C5LS0
0x2F L1AR L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0
0x30 L1ATRT L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0
0x31 L2AR L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0
0x32 L2ATRT L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0
PWM output timing
0x33 C12OT Reserved C2OT2 C2OT1 C2OT0 Reserved C1OT2 C1OT1 C1OT0
0x34 C34OT Reserved C4OT2 C4OT1 C4OT0 Reserved C3OT2 C3OT1 C3OT0
0x35 C56OT Reserved C6OT2 C6OT1 C6OT0 Reserved C5OT2 C5OT1 C5OT0
0x36 C78OT Reserved C8OT2 C8OT1 C8OT0 Reserved C7OT2 C7OT1 C7OT0
I2S output channel mapping
0x37 C12OM Reserved C2OM2 C2OM1 C2OM0 Reserved C1OM2 C1OM1 C1OM0
Table 8. Register summary (continued)
Addr Name D7 D6 D5 D4 D3 D2 D1 D0
STA309A Registers
Doc ID 13855 Rev 4 21/67
0x38 C34OM Reserved C4OM2 C4OM1 C4OM0 Reserved C3OM2 C3OM1 C3OM0
0x39 C56OM Reserved C6OM2 C6OM1 C6OM0 Reserved C5OM2 C5OM1 C5OM0
0x3A C78OM Reserved C8OM2 C8OM1 C8OM0 Reserved C7OM2 C7OM1 C7OM0
User-defined coefficient RAM
0x3B CFADDR1 Reserved CFA9 CFA8
0x3C CFADDR2 CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0
0x3D B1CF1 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16
0x3E B1CF2 C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8
0x3F B1CF3 C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0
0x40 B2CF1 C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16
0x41 B2CF2 C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8
0x42 B2CF3 C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0
0x43 A1CF1 C3B23 C3B22 C3B21 C3B20 C3B19 C3B18 C3B17 C3B16
0x44 A1CF2 C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8
0x45 A1CF3 C3B7 C3B6 C3B5 C3B4 C3B3 C3B2 C3B1 C3B0
0x46 A2CF1 C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16
0x47 A2CF2 C4B15 C4B14 C4B13 C4B12 C4B11 C4B10 C4B9 C4B8
0x48 A2CF3 C4B7 C4B6 C4B5 C4B4 C4B3 C4B2 C4B1 C4B0
0x49 B0CF1 C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16
0x4A B0CF2 C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8
0x4B B0CF3 C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0
0x4C CFUD Reserved WA W1
0x4D MPCC1 MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8
0x4E MPCC2 MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0
0x4F DCC1 DCC15 DCC14 DCC13 DCC12 DCC11 DCC10 DCC9 DCC8
0x50 DCC2 DCC7 DCC6 DCC5 DCC4 DCC3 DCC2 DCC1 DCC0
0x51 PSC1 RCV11 RCV10 RCV9 RCV8 RCV7 RCV6 RCV5 RCV4
0x52 PSC2 RCV3 RCV2 RCV1 RCV0 CNV11 CNV10 CNV9 CNV8
0x53 PSC3 CNV7 CNV6 CNV5 CNV4 CNV3 CNV2 CNV1 CNV0
Table 8. Register summary (continued)
Addr Name D7 D6 D5 D4 D3 D2 D1 D0
Registers STA309A
22/67 Doc ID 13855 Rev 4
7.2 Register description
7.2.1 Configuration register A (0x00)
The STA309A supports sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, 192 kHz, and 2.8224 MHz DSD. Therefore, the internal clocks are:
z65.536 MHz for 32 kHz
z90.3168 MHz for 44.1 kHz, 88.2 kHz, 176.4 kHz, and DSD
z98.304 MHz for 48 kHz, 96 kHz, and 192 kHz
The external clock frequency provided to the XTI pin must be a multiple of the input sample
frequency (fs). The relationship between the input clock and the input sample rate is
determined by both the MCSn and the IRn (input rate) register bits. The MCSn bits
determine the PLL factor generating the internal clock and the IRn bits determine the
oversampling ratio used internally.
76543210
COS1 COS0 DSPB IR1 IR0 MCS2 MCS1 MCS0
10000011
Table 9. MSC bits
Bit RW RST Name Description
0RW 1MCS0
Master clock select: selects the ratio between the input
I2S sample frequency and the input clock.
1RW 1MCS1
2RW 0MCS2
Table 10. MSC sample rates
Input sample rate
fs (kHz) IR MCS[2:0]
1XX 011 010 001 000
32, 44.1, 48 00 128 * fs 256 * fs 384 * fs 512 * fs 768 * fs
88.2, 96 01 64 * fs 128 * fs 192 * fs 256 * fs 384 * fs
176.4, 192 10 64 * fs 128 * fs 192 * fs 256 * fs 384 * fs
DSD 11 2 * fs 4 * fs 6 * fs 8 * fs 12 * fs
STA309A Registers
Doc ID 13855 Rev 4 23/67
Interpolation ratio select
The STA309A has variable interpolation (oversampling) settings such that internal
processing and DDX output rates remain consistent. The first processing block interpolates
by either 4 times, 2 times, or 1 time (pass-through).
The oversampling ratio of this interpolation is determined by the IR bits.
I
Setting the DSPB bit bypasses the biquad function of the Omega DDX core.
Table 11. Interpolation ratio bits
Bit RW RST Name Description
3RW0IR0 Interpolation ratio select: selects internal interpolation
ratio based on input I2S sample frequency
4RW0IR1
Table 12. IR sample rates
IR[1,0] Input sample rate
fs (kHz) 1st stage interpolation ratio
00 32 4-times oversampling
00 44.1 4-times oversampling
00 48 4-times oversampling
01 88.2 2-times oversampling
01 96 2-times oversampling
10 176.4 Pass-through
10 192 Pass-through
11 DSD DSD to 176.4 kHz conversion
Table 13. DSPB bit
Bit RW RST Name Description
0 RW 0 DSPB
DSP bypass bit:
0: normal operation
1: bypass of biquad and bass/treble functions
Table 14. COS bits
COS[1,0] CKOUT frequency
00 PLL output
01 PLL output / 4
10 PLL output / 8
11 PLL output / 16
Registers STA309A
24/67 Doc ID 13855 Rev 4
7.2.2 Configuration register B (0x01) - serial input formats
Serial data interface
The STA309A audio serial input interfaces with standard digital audio components and
accepts a number of serial data formats. STA309A always acts a slave when receiving audio
input from standard digital audio components. Serial data for eight channels is provided
using 6 input pins: left/right clock LRCKI (pin 10), serial clock BICKI (pin 11), serial data 1
and 2 SDI12 (pin 9), serial data 3 and 4 SDI34 (pin 8), serial data 5 and 6 SDI56 (pin 7), and
serial data 7 and 8 SDI78 (pin 6). The SAI/SAIFB register (Configuration Register B,
address 0x01) is used to specify the serial data format. The default serial data format is I2S,
MSB-first. Available formats are shown in the tables and figure that follow.
Note: Serial input and output formats are specified separately
For example, SAI = 1110 and SAIFB = 1 would specify right-justified 16-bit data, LSB-first.
D7 D6 D5 D4 D3 D2 D1 D0
Reserved SAIFB SAI3 SAI2 SAI1 SAI0
00000000
Table 15. SAI bits
Bit RW RST Name Description
0 RW 0 SAI0
Serial audio input interface format: determines the
interface format of the input serial digital audio
interface.
1 RW 0 SAI1
2 RW 0 SAI2
3 RW 0 SAI3
Table 16. SAIFB bit
Bit RW RST Name Description
4 RW 0 SAIFB
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
STA309A Registers
Doc ID 13855 Rev 4 25/67
The table below lists the serial audio input formats supported by STA309A as related to
BICKI = 32 * fs, 48 * fs, 64 * fs, where sampling rate, fs = 32, 44.1, 48, 88.2, 96, 176.4,
192 kHz.
Table 17. SAI and SAIFB serial clock
BICKI SAI [3:0] SAIFB Interface format
32 * fs 1100 X I2S 15-bit data
1110 X Left/right-justified 16-bit data
48 * fs
0100 X I2S 23-bit data
0100 X I2S 20-bit data
1000 X I2S 18-bit data
0100 0 MSB-first I2S 16-bit data
1100 1 LSB-first I2S 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
64 * fs
0000 X I2S 24-bit data
0100 X I2S 20-bit data
1000 X I2S 18-bit data
0000 0 MSB-first I2S 16-bit data
1100 1 LSB-first I2S 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
Registers STA309A
26/67 Doc ID 13855 Rev 4
7.2.3 Configuration register C (0x02) - serial output formats
The STA309A features a serial audio output interface that consists of 8 channels. The serial
audio output always acts as a slave to the serial audio input interface and, therefore, all
output clocks are synchronous with the input clocks. The output sample frequency (fs) is
also equivalent to the input sample frequency. In the case of SACD/DSD input, the serial
audio output acts as a master with an output sampling frequency of 176.4 kHz. The output
serial format can be selected independently from the input format and is done via the SAO
and SAOFB bits.
D7 D6 D5 D4 D3 D2 D1 D0
Reserved SAOFB SAO3 SAO2 SAIO SAO0
00000000
Table 18. SAO bits
Bit RW RST Name Description
0RW 0 SAO0
Serial audio output interface format: determines the
interface format of the output serial digital audio
interface.
1RW 0 SAO1
2RW 0 SAO2
3RW 0 SAO3
Table 19. SAOFB bit
Bit RW RST Name Description
4RW 0 SAOFB
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
Table 20. SAO serial clock
BICKI = BICKO SAO[3:0] Interface data format
32 * fs 0111 I2S data
1111 Left/right-justified 16-bit data
48 * fs
1110 I2S data
0001 Left-justified data
1010 Right-justified 24-bit data
1011 Right-justified 20-bit data
1100 Right-justified 18-bit data
1101 Right-justified 16-bit data
STA309A Registers
Doc ID 13855 Rev 4 27/67
7.2.4 Configuration register D (0x03)
The DDX power output mode selects how the DDX output timing is configured. Different
power devices use different output modes. The STA50x recommended use is OM = 10.
64 * fs
0000 I2S data
0001 Left-justified data
0010 Right-justified 24-bit data
0011 Right-justified 20-bit data
0100 Right-justified 18-bit data
0101 Right-justified 16-bit data
Table 20. SAO serial clock (continued)
BICKI = BICKO SAO[3:0] Interface data format
D7 D6 D5 D4 D3 D2 D1 D0
MPC CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0
11000010
Table 21. OM bits
Bit RW RST Name Description
0RW 0 OM0 DDX power output mode: selects configuration of
DDX output.
1RW 1 OM1
Table 22. Output stage mode
OM[1:0] Output stage - mode
00 STA50x/STA51xB - drop compensation
01 Discrete output stage - tapered compensation
10 STA50x/STA51xB - full power mode
11 Variable drop compensation (CSZn bits)
Table 23. CSZ bits
Bit RW RST Name Description
2RW 0 CSZ0
Contra size register: when OM[1,0] = 11, this register
determines the size of the DDX compensating pulse
from 0 clock ticks to 31 clock periods.
3RW 0 CSZ1
4RW 0 CSZ2
5RW 0 CSZ3
6RW 1 CSZ4
Registers STA309A
28/67 Doc ID 13855 Rev 4
Setting the MPC bit turns on special processing that corrects the STA50x power device at
high power. This mode should lower the THD+N of a full STA50x DDX system at maximum
power output and slightly below. This mode will only be operational in OM[1,0] = 01.
7.2.5 Configuration register E (0x04)
Each individual channel output can be set to output a binary PWM stream. In this mode
output A of a channel will be considered the positive output and output B is negative inverse.
Table 24. CSZ definition
CSZ[4:0] Compensating pulse size
00000 0 clock period compensating pulse size
00001 1 clock period compensating pulse size
……
11111 31 clock period compensating pulse size
Table 25. MPC bit
Bit RW RST Name Description
7RW 1 MPC
Max power correction:
1: enable STA50x correction for THD reduction near
maximum power output.
D7 D6 D5 D4 D3 D2 D1 D0
C8BO C7BO C6BO C5BO C4BO C3BO C2BO C1BO
00000000
Table 26. CnBO bits
Bit RW RST Name Description
0RW 0 C1BO
Channels 1, 2, 3, 4, 5, 6, 7, and 8 binary output
mode enable bits:
0: ordinary DDX tristate output
1: binary output mode.
1RW 0 C2BO
2RW 0 C3BO
3RW 0 C4BO
4RW 0 C5BO
5RW 0 C6BO
6RW 0 C7BO
7RW 0 C8BO
STA309A Registers
Doc ID 13855 Rev 4 29/67
7.2.6 Configuration register F (0x05)
The STA309A features an internal digital high-pass filter for the purpose of AC coupling. The
purpose of this filter is to prevent DC signals from passing through a DDX amplifier. DC
signals can cause speaker damage.
If HPB = 1, then the filter that the high-pass filter utilizes is made available as user-
programmable biquad#1.
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.
By setting this bit to one de-emphasis will implemented on all channels. When this is used it
takes the place of biquad #7 in each channel and any coefficients using biquad #1 will be
ignored. DSPB (DSP bypass) bit must be set to 0 for de-emphasis to function.
D7 D6 D5 D4 D3 D2 D1 D0
PWMS2 PWMS1 PWMS0 BQL PSL DEMP DRC HPB
00000000
Table 27. HPB bit
Bit RW RST Name Description
0RW 0 HPB High-pass filter bypass bit:
1: bypass internal AC coupling digital high-pass filter
Table 28. DRC bit
Bit RW RST Name Description
1 RW 0 DRC
Dynamic range compression/anti-clipping:
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode
Table 29. DEMP bit
Bit RW RST Name Description
2RW 0 DEMP
De-emphasis:
0: no de-emphasis
1: de-emphasis
Registers STA309A
30/67 Doc ID 13855 Rev 4
The Postscale function can be used for power-supply error correction. For multi-channel
applications running off the same power-supply, the postscale values can be linked to the
value of channel 1 for ease of use and update the values faster.
For ease of use, all channels can use the biquad coefficients loaded into the channel 1
coefficient RAM space by setting bit BQL to 1. Therefore, any EQ updates only have to be
performed once.
Table 30. PSL bit
Bit RW RST Name Description
3 RW 0 PSL
Postscale link:
0: each channel uses individual postscale value
1: each channel uses channel 1 postscale value
Table 31. BQL bit
Bit RW RST Name Description
4RW 0 BQL
Biquad link:
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
Table 32. PWMS bits
Bit RW RST Name Description
7:5 RW 00 PWMS[2:0] PWM speed selection
Table 33. PWM output speed
PWMS[1:0] PWM output speed
000 Normal speed (384 kHz) (all channels
001 Half-speed (192 kHz) (all channels
010 Double-speed (768 kHz) (all channels
011 Normal speed (channels 1-6), double-speed (channels 7-8)
100 Odd speed (341.3 kHz) (all channels)
STA309A Registers
Doc ID 13855 Rev 4 31/67
7.2.7 Configuration register G (0x06)
The STA309A features a DDX processing mode that minimizes the amount of noise
generated in frequency range of AM radio. This mode is intended for use when DDX is
operating in a device with an AM tuner active. The SNR of the DDX processing is reduced to
~83 dB in this mode, which is still greater than the SNR of AM radio.
The STA309A features a 2 DDX processing modes that minimize the amount of noise
generated in frequency range of AM radio. This second mode is intended for use when DDX
is operating in a device with an AM tuner active. This mode eliminates the noise-shaper.
Channels 7 and 8 can be configured to be processed and output in such a manner that
headphones can be driven using and appropriate output device. This signal is a differential
3-wire drive called DDX Headphone.
D7 D6 D5 D4 D3 D2 D1 D0
MPCV DCCV HPE AM2E AME COD SID PWMD
00000000
Table 34. Register G bit definitions
Bit RW RST Name Description
0RW0PWMD
PWM output disable:
0: PWM output normal
1: no PWM output
1RW0SID
Serial interface (I2S out) disable:
0: I2S output normal
1: no I2S output
2RW0COD
Clock output disable:
0: clock output normal
1: no clock output
3RW0AME
AM mode enable:
0: normal DDX operation.
1: AM reduction mode DDX operation.
Table 35. AM2E bit
Bit RW RST Name Description
4RW 0AM2E
AM2 mode enable:
0: normal DDX operation.
1: AM2 reduction mode DDX operation.
Table 36. HPE bit
Bit RW RST Name Description
5RW 0HPE
DDX headphone enable:
0: channels 7 and 8 normal DDX operation
1: channels 7 and 8 headphone operation
Registers STA309A
32/67 Doc ID 13855 Rev 4
7.2.8 Configuration register H (0x07)
The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital
zero-crossings no clicks will be audible.
Table 37. DCCV bit
Bit RW RST Name Description
6 RW 0 DCCV
Distortion compensation variable enable:
0: uses preset DC coefficient.
1: uses DCC coefficient.
Table 38. MPCV bit
Bit RW RST Name Description
7RW 0MPCV
Max power correction variable:
0: use standard MPC coefficient
1: use MPCC bits for MPC coefficient
D7 D6 D5 D4 D3 D2 D1 D0
ECLE LDTE BCLE IDE ZDE SVE ZCE NSBW
01111110
Table 39. NSBW bit
Bit RW RST Name Description
0RW0NSBW
Noise-shaper bandwidth selection:
1: 3rd order NS
0: 4th order NS
Table 40. ZCE bit
Bit RW RST Name Description
1RW1ZCE
Zero-crossing volume enable:
1: volume adjustments will only occur at digital zero-
crossings
0: volume adjustments will occur immediately
Table 41. SVE bit
Bit RW RST Name Description
2 RW 1 SVE
Soft volume enable:
1: volume adjustments use soft volume
0: volume adjustments occur immediately
Table 42. ZDE bit
Bit RW RST Name Description
3RW1ZDE Zero-detect mute enable:
1: enable the automatic zero-detect mute
STA309A Registers
Doc ID 13855 Rev 4 33/67
Setting the ZDE bit enables the zero-detect automatic mute. 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.
Setting the IDE bit enables this function, which looks at the input I2S data and will
automatically mute if the signals are perceived as invalid.
Detects loss of input MCLK in binary mode and will output 50% duty cycle.
Actively prevents double trigger of LRCLK.
When active will issue a device power down signal (EAPD) on clock loss detection
7.2.9 Configuration register I (0x08)
This feature utilizes an ADC on SDI78 that provides power supply ripple information for
correction. Registers PSC1, PSC2, PSC3 are utilized in this mode.
Table 43. IDE bit
Bit RW RST Name Description
4RW 1 IDE Invalid input detect mute enable:
1: enable the automatic invalid input detect mute
Table 44. BCLE bit
Bit RW RST Name Description
5 RW 1 BCLE Binary output mode clock loss detection enable
Table 45. LDTE bit
Bit RW RST Name Description
6 RW 1 LDTE LRCLK double trigger protection enable
Table 46. ECLE bit
Bit RW RST Name Description
7 RW 0 ECLE Auto EAPD on clock loss
D7 D6 D5 D4 D3 D2 D1 D0
EAPD Reserved PSCE
00000000
Table 47. PSCE bit
Bit RW RST Name Description
0 RW 0 PSCE
Power supply ripple correction enable:
0: normal operation
1: PSCorrect operation
Registers STA309A
34/67 Doc ID 13855 Rev 4
7.2.10 Master mute register (0x09)
7.2.11 Master volume register (0x0A)
Note: Value of volume derived from MVOL is dependent on AMV Automode volume settings.
7.2.12 Channel 1 volume (0x0B)
7.2.13 Channel 2 volume (0x0C)
7.2.14 Channel 3 volume (0x0D)
7.2.15 Channel 4 volume (0x0E)
Table 48. EAPD bit
Bit RW RST Name Description
7 RW 0 EAPD
External amplifier power down:
0: external power stage power down active
1: normal operation
D7 D6 D5 D4 D3 D2 D1 D0
Reserved MMUTE
00000000
D7 D6 D5 D4 D3 D2 D1 D0
MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0
11111111
D7 D6 D5 D4 D3 D2 D1 D0
C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C4V7 C4V6 C4V5 C4V4 C4V3 C4V2 C4V1 C4V0
01100000
STA309A Registers
Doc ID 13855 Rev 4 35/67
7.2.16 Channel 5 volume (0x0F)
7.2.17 Channel 6 volume (0x10)
7.2.18 Channel 7 volume (0x11)
7.2.19 Channel 8 volume (0x12)
7.2.20 Channel 1 volume trim, mute, bypass (0x13)
7.2.21 Channel 2 volume trim, mute, bypass (0x14)
7.2.22 Channel 3 volume trim, mute, bypass (0x15)
D7 D6 D5 D4 D3 D2 D1 D0
C5V7 C5V6 C5V5 C5V4 C5V3 C5V2 C5V1 C5V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C6V7 C6V6 C6V5 C6V4 C6V3 C6V2 C6V1 C6V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C7V7 C7V6 C7V5 C7V4 C7V3 C7V2 C7V1 C7V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C8V7 C8V6 C8V5 C8V4 C8V3 C8V2 C8V1 C8V0
01100000
D7 D6 D5 D4 D3 D2 D1 D0
C1M C1VBP Reserved C1VT4 C1VT3 C1VT2 C1VT1 C1VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C2M C2VBP Reserved C2VT4 C2VT3 C2VT2 C2VT1 C2VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C3M C3VBP Reserved C3VT4 C3VT3 C3VT2 C3VT1 C3VT0
00010000
Registers STA309A
36/67 Doc ID 13855 Rev 4
7.2.23 Channel 4 volume trim, mute, bypass (0x16)
7.2.24 Channel 5 volume trim, mute, bypass (0x17)
7.2.25 Channel 6 volume trim, mute, bypass (0x18)
7.2.26 Channel 7 volume trim, mute, bypass (0x19)
7.2.27 Channel 8 volume trim, mute, bypass (0x1A)
The volume structure of the STA309A consists of individual volume registers for each
channel and a master volume register that provides an offset to each channels volume
setting. There is also an additional offset for each channel called the channel volume trim.
The individual channel volumes are adjustable in 0.5 dB steps from +48 dB to -78 dB. As an
example if C5V = 0xXX or +XXX dB and MV = 0xXX or -XX dB, then the total gain for
channel 5 = XX dB. The channel volume trim is adjustable independently on each channel
from -10 dB to +10 dB in 1 dB steps. The master mute when set to 1 will mute all channels
at once, whereas the individual channel mutes (CnM) will mute only that channel. Both the
master mute and the channel mutes provide a "soft mute" with the volume ramping down to
mute in 8192 samples from the maximum volume setting at the internal processing rate
(~192 kHz). A "hard mute" can be obtained by commanding a value of 0xFF (255) to any
channel volume register or the master volume register. When volume offsets are provided
via the master volume register any channel that whose total volume is less than -91 dB will
be muted. All changes in volume take place at zero-crossings when ZCE = 1 (configuration
register H) on a per channel basis as this creates the smoothest possible volume transitions.
When ZCE = 0, volume updates occur immediately. Each channel also contains an
individual channel volume bypass. If a particular channel has volume bypassed via the
CnVBP = 1 register then only the channel volume setting for that particular channel affects
D7 D6 D5 D4 D3 D2 D1 D0
C4M C4VBP Reserved C4VT4 C4VT3 C4VT2 C4VT1 C4VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C5M C5VBP Reserved C5VT4 C5VT3 C5VT2 C5VT1 C5VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C6M C6VBP Reserved C6VT4 C6VT3 C6VT2 C6VT1 C6VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C7M C7VBP Reserved C7VT4 C7VT3 C7VT2 C7VT1 C7VT0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
C8M C8VBP Reserved C8VT4 C8VT3 C8VT2 C8VT1 C8VT0
00010000
STA309A Registers
Doc ID 13855 Rev 4 37/67
the volume setting, the master volume setting will not affect that channel. Each channel also
contains a channel mute. If CnM = 1 a soft mute is performed on that channel.
Table 49. MV bits
MV[7:0] Volume offset from channel value
0x00 0 dB
0x01 -0.5 dB
0x02 -1 dB
……
0x4C -38 dB
……
0xFE -127 dB
0xFF Hardware channel mute
Table 50. CnV bits
CnV[7:0] Volume
0x00 +48 dB
0x01 +47.5 dB
0x02 +47 dB
……
0x5F +0.5 dB
0x60 0 dB
0x61 -0.5 dB
……
0xFE -79.5 dB
0xFF Hardware channel mute
Table 51. CnVT bits
CnVT[4:0] Volume
0x00 to 0x06 +10 dB
0x07 +9 dB
……
0x0F +1 dB
0x10 0 dB
0x11 -1 dB
……
0x19 -9 dB
0x1A to 0x1F -10 dB
Registers STA309A
38/67 Doc ID 13855 Rev 4
7.2.28 Channel input mapping channels 1 and 2 (0x1B)
7.2.29 Channel input mapping channels 3 and 4 (0x1C)
7.2.30 Channel input mapping channels 5 and 6 (0x1D)
7.2.31 Channel input mapping channels 7 and 8 (0x1E)
Each channel received via I2S can be mapped to any internal processing channel via the
channel input mapping registers. This allows for flexibility in processing, simplifies output
stage designs, and enables the ability to perform crossovers. The default settings of these
registers map each I2S input channel to its corresponding processing channel.
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C2IM2 C2IM1 C2IM0 Reserved C1IM2 C1IM1 C1IM0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C4IM2 C4IM1 C4IM0 Reserved C3IM2 C3IM1 C3IM0
00110010
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C6IM2 C6IM1 C6IM0 Reserved C5IM2 C5IM1 C5IM0
01010100
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C8IM2 C8IM1 C8IM0 Reserved C7IM2 C7IM1 C7IM0
01110110
Table 52. CnIM bits
CnIM[2:0] Serial input from
000 Channel 1
001 Channel 2
010 Channel 3
011 Channel 4
100 Channel 5
101 Channel 6
110 Channel 7
111 Channel 8
STA309A Registers
Doc ID 13855 Rev 4 39/67
7.2.32 AUTO1 - Automode™ EQ, volume, GC (0x1F)
By setting AMEQ to any setting other than 00 enables Automode EQ, biquads 1-5 are not
user programmable. Any coefficient settings for these biquads will be ignored. Also when
Automode EQ is used the prescale value for channels 1-6 becomes hard-set to -18 dB.
Automode downmix setting uses channels 7-8 of Mix#1 engine and therefore these
channels of this function are fixed and not allowed to be user set when in this mode.
D7 D6 D5 D4 D3 D2 D1 D0
AMDM AMGC2 AMGC1 AMGC0 AMV1 AMV0 AMEQ1 AMEQ0
00000000
Table 53. AMEQ bits
Bit RW RST Name Description
1:0 RW 0 AMEQ[1:0]
Biquad 2-6 mode is:
00: user programmable
01: preset EQ - PEQ bits
10: graphic EQ - xGEQ bits
11: auto volume controlled loudness curve
Table 54. AMV bits
Bit RW RST Name Description
3:2 RW 0 AMV[1:0]
Automode volume mode (MVOL) is:
00: MVOL 0.5 dB 256 steps (standard)
01: MVOL auto curve 30 steps
10: MVOL auto curve 40 steps
11: MVOL auto curve 50 steps
6:4 RW 0 AMGC[2:0]
Automode gain compression/limiters mode is:
000: user programmable GC
001: AC no clipping
010: AC limited clipping (10%), 90% signal unclipped
011: DRC nighttime listening mode
100: DRC TV commercial/channel AGC
101: AC 5.1 no clipping
110: AC 5.1 limited clipping (10%)
Table 55. AMDM bit
Bit RW RST Name Description
7RW 0 AMDM
Automode 5.1 downmix:
0: normal operation
1: channels 7-8 are 2-channel downmix of channels
1-6
Registers STA309A
40/67 Doc ID 13855 Rev 4
Channels 1-6 must be arranged via channel mapping (registers CnIM) if necessary in the
following manner for this operation:
Channel 1: left
Channel 2: right
Channel 3: left surround
Channel 4: right surround
Channel 5: center
Channel 6: LFE.
7.2.33 AUTO2 - Automode™ bass management2 (0x20)
Setting the AMBMME bit enables the proper mixing to take place for various preset bass
management configurations. Setting the AMBMXE bit enables the proper crossover filtering
in biquad #7 to take place. The crossover for bass management is always 2nd order
(24 dB/oct) and the crossover frequency is determined by register bits PREEQ.XO[2:0].
All configurations of Dolby® bass management can be performed in the IC. These different
configurations are selected as they would be by the end-user.
The Automode bass management settings utilize channels 1-6 on the Mix #1 engine,
Channels 1-6 biquad #6, and channels 1-2 on the mix #2 engine in configuration #2. These
functions cannot be user programmed while the bass management Automode is active.
Not all settings are valid as some configurations are unlikely and do not have to be
supported by Dolby® specification.
Automatic crossover settings are provided or custom crossovers can be implemented using
the available programmable biquads.
D7 D6 D5 D4 D3 D2 D1 D0
SUB RSS1 RSS0 CSS1 CSS0 FSS AMBMXE AMBMME
10000000
Table 56. AMBMME bit
Bit RW RST Name Description
0 RW 0 AMBMME 0: Automode bass management mix disabled
1: Automode bass management mix enabled
Table 57. AMBMXE bit
Bit RW RST Name Description
1 RW 0 AMBMXE 0: Automode bass management crossover disabled
1: Automode bass management crossover enabled
STA309A Registers
Doc ID 13855 Rev 4 41/67
Input channels must be mapped using the channel-mapping feature in the following manner
for bass management to be performed properly.
1: left front
2: right front
3: left rear
4: right rear
5: center
6: LFE
When AMBMXE = 1, biquad #7 on channels 1-6 are utilized for bass-management
crossover filter, this biquad is not user programmable in this mode. The XO settings
determine the crossover frequency used, the crossover is 2nd order for both high-pass and
low-pass with a -3 dB cross point. Higher order filters can be obtained be programming
coefficients in other biquads if desired.
It is recommended to use settings of 120-160 Hz when using small, single driver satellite
speakers as the frequency response of these speakers normally are limited to this region.
7.2.34 AUTO3 - Automode™ AM/prescale/bass management scale (0x21)
Table 58. CSS and RSS bits
Bitfield 10 01 00
CSS - center speaker size Off Large Small
RSS - rear speaker size Off Large Small
Table 59. FSS and SUB bits
Bitfield 1 0
FSS - front speaker size Large Small
SUB - subwoofer On Off
D7 D6 D5 D4 D3 D2 D1 D0
AMAM2 AMAM1 AMAM0 AMAME Reserved MSA AMPS
00000001
Table 60. AMPS bit
Bit RW RST Name Description
0RW0 AMPS
Automode prescale
0: -18 dB used for prescale when AMEQ is not 00
1: user defined prescale when AMEQ is not 00
Table 61. MSA bit
Bit RW RST Name Description
1RW0 MSA
Bass management mix scale adjustment
0: -12 dB scaling on satellite channels in Config #1
1: no scaling on satellite channels in Config #1
Registers STA309A
42/67 Doc ID 13855 Rev 4
7.2.35 PREEQ - Preset EQ settings (0x22)
Table 62. AMAME bits
Bit RW RST Name Description
4RW0 AMAME
Automode AM enable
0: switching frequency determined by PWMS settings
1: switching frequency determined by AMAM settings
Table 63. AMAM bits
AMAM[2:0] 48 kHz/96 kHz input, fs 44.1 / 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
D7 D6 D5 D4 D3 D2 D1 D0
XO2 XO1 XO0 PEQ4 PEQ3 PEQ2 PEQ1 PEQ0
10100000
Table 64. XO bits
XO[2:0] Bass management
crossover frequency
000 70 Hz
001 80 Hz
010 90 Hz
011 100 Hz
100 110 Hz
101 120 Hz
110 140 Hz
111 160 Hz
STA309A Registers
Doc ID 13855 Rev 4 43/67
Table 65. PEQ bits
PEQ[4:0] Mode / 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
10000 Loudness 1
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
Registers STA309A
44/67 Doc ID 13855 Rev 4
7.2.36 AGEQ - graphic EQ 80-Hz band (0x23)
7.2.37 BGEQ - graphic EQ 300-Hz band (0x24)
7.2.38 CGEQ - graphic EQ 1-kHz band (0x25)
7.2.39 DGEQ - graphic EQ 3-kHz band (0x26)
7.2.40 EGEQ - graphic EQ 8-kHz band (0x27)
D7 D6 D5 D4 D3 D2 D1 D0
Reserved AGEQ4 AGEQ3 AGEQ2 AGEQ1 AGEQ0
00001111
D7 D6 D5 D4 D3 D2 D1 D0
Reserved BGEQ4 BGEQ3 BGEQ2 BGEQ1 BGEQ0
00001111
D7 D6 D5 D4 D3 D2 D1 D0
Reserved CGEQ4 CGEQ3 CGEQ2 CGEQ1 CGEQ0
00001111
D7 D6 D5 D4 D3 D2 D1 D0
Reserved DGEQ4 DGEQ3 DGEQ2 DGEQ1 DGEQ0
00001111
D7 D6 D5 D4 D3 D2 D1 D0
Reserved EGEQ4 EGEQ3 EGEQ2 EGEQ1 EGEQ0
00001111
Table 66. xGEQ bits
xGEQ[4:0] Boost / cut
11111 +16
11110 +15
11101 +14
……
10000 +1
01111 0
01110 -1
……
00001 -14
00000 -15
STA309A Registers
Doc ID 13855 Rev 4 45/67
7.2.41 Biquad internal channel loop-through (0x28)
Each internal processing channel can receive two possible inputs at the input to the biquad
block. The input can come either from the output of that channel’s MIX#1 engine or from the
output of the bass/treble (Biquad#10) of the previous channel. In this scenario, channel 1
receives channel 8. This enables the use of more than 10 biquads on any given channel at
the loss of the number of separate internal processing channels.
7.2.42 Mix internal channel loop-through (0x29)
Each internal processing channel can receive two possible sets of inputs at the inputs to the
Mix#1 block. The inputs can come from the outputs of the interpolation block as normally
occurs (CnMXLP = 0) or they can come from the outputs of the Mix#2 block. This enables
the use of additional filtering after the second mix block at the expense of losing this
processing capability on the channel.
D7 D6 D5 D4 D3 D2 D1 D0
C8BLP C7BLP C6BLP C5BLP C4BLP C3BLP C2BLP C1BLP
00000000
Table 67. CnBLP bits
Bit RW RST Name Description
7:0 RW 0 CnBLP
For n = 1 to 8:
0: input from channel n MIX#1 engine output - normal
operation
1: input from channel (n - 1) biquad #10 output - loop
operation.
D7 D6 D5 D4 D3 D2 D1 D0
C8MXLP C7MXLP C6MXLP C5MXLP C4MXLP C3MXLP C2MXLP C1MXLP
00000000
Table 68. CnMXLP bits
Bit RW RST Name Description
7:0 RW 0 CnMXLP
For n = 1 to 8:
0: inputs to channel n MIX#1 engine from interpolation
outputs - normal operation
1: inputs to channel n MIX#1 engine from MIX#2 engine
outputs - loop operation.
Registers STA309A
46/67 Doc ID 13855 Rev 4
7.2.43 EQ bypass (0x2A)
EQ control can be bypassed on a per channel basis. If EQ control is bypassed on a given
channel the prescale and all 10 filters (high-pass, biquads, de-emphasis, bass management
cross-over, bass, treble in any combination) are bypassed for that channel.
7.2.44 Tone control bypass (0x2B)
Tone control (bass/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 made available as
user programmable biquads #9 and #10.
D7 D6 D5 D4 D3 D2 D1 D0
C8EQBP C7EQBP C6EQBP C5EQBP C4EQCBP C3EQBP C2EQBP C1EQBP
00000000
Table 69. CnEQBP bits
Bit RW RST Name Description
7:0 RW 0 CnEQBP
For n = 1 to 8:
0: perform EQ on channel n - normal operation
1: bypass EQ on channel n.
D7 D6 D5 D4 D3 D2 D1 D0
C8TCB C7TCB C6TCB C5TCB C4TCB C3TCB C2TCB C1TCB
00000000
STA309A Registers
Doc ID 13855 Rev 4 47/67
7.2.45 Tone control (0x2C)
This is the tone control boost / cut as a function of BTC and TTC bits.
7.2.46 Channel limiter select channels 1,2,3,4 (0x2D)
7.2.47 Channel limiter select channels 5,6,7,8 (0x2E)
7.2.48 Limiter 1 attack/release rate (0x2F)
D7 D6 D5 D4 D3 D2 D1 D0
TTC3 TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0
01110111
Table 70. BTC and TTC bits
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 +12dB
D7 D6 D5 D4 D3 D2 D1 D0
C4LS1 C4LS0 C3LS1 C3LS0 C2LS1 C2LS0 C1LS1 C1LS0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C8LS1 C8LS0 C7LS1 C7LS0 C6LS1 C6LS0 C5LS1 C5LS0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0
01101010
Registers STA309A
48/67 Doc ID 13855 Rev 4
7.2.49 Limiter 1 attack/release threshold (0x30)
7.2.50 Limiter 2 attack/release rate (0x31)
7.2.51 Limiter 2 attack/release threshold (0x32)
7.2.52 Bit description
The STA309A 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 B, bit 7 address 0x02. Each
channel can be mapped to either limiter or not mapped, meaning that channel will clip when
0 dBFS 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 LnAT registers. It is recommended in
anti-clipping mode to set this to 0 dBFS, which corresponds to the maximum unclipped
output power of a DDX amplifier. Since gain can be added digitally within the STA309A it is
possible to exceed 0 dBFS or any other LnAT setting, when this occurs, the limiter, when
active, will automatically start 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. The gain reduction occurs on a peak-detect algorithm.
The release of limiter, when the gain is again increased, is dependent on a RMS-detect
algorithm. The output of the volume/limiter block is passed through a RMS filter. The output
of this filter is compared to the release threshold, determined by the Release Threshold
register. When the RMS filter output falls below the release threshold, the gain is again
increased at a rate dependent upon the Release Rate register. The gain can never be
increased past it's 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
D7 D6 D5 D4 D3 D2 D1 D0
L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0
01101001
D7 D6 D5 D4 D3 D2 D1 D0
L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0
01101010
D7 D6 D5 D4 D3 D2 D1 D0
L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0
01101001
STA309A Registers
Doc ID 13855 Rev 4 49/67
that limiter and the release threshold is set relative to the maximum volume setting plus the
attack threshold.
Figure 7. Basic limiter and volume flow diagram
Table 71. Channel limiter mapping
CnLS[1:0] Channel limiter mapping
00 Channel has limiting disabled
01 Channel is mapped to limiter #1
10 Channel is mapped to limiter #2
Table 72. Attack rate
LnA[3:0] Attack rate (dB/ms)
0000 3.1584 (fast)
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 (slow)
Gain Attenuation Saturation
Limiter RMS
Output
Gain, volume
Input
Registers STA309A
50/67 Doc ID 13855 Rev 4
Table 73. Release rate
LnR[3:0] Release rate (dB/ms)
0000 0.5116 (fast)
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 (slow)
Table 74. LnAT bits, anti-clipping
LnAT[3:0] Anti-clipping (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
STA309A Registers
Doc ID 13855 Rev 4 51/67
Table 75. LnRT bits, anti-clipping
LnRT[3:0] Anti-clipping (AC)
(dB relative to FS)
0000 -∞
0001 -29 dB
0010 -20 dB
0011 -16 dB
0100 -14 dB
0101 -12 dB
0110 -10 dB
0111 -8 dB
1000 -7 dB
1001 -6 dB
1010 -5 dB
1011 -4 dB
1100 -3 dB
1101 -2 dB
1110 -1 dB
1111 -0 dB
Table 76. LnAT bits, dynamic range compression
LnAT[3:0] Dynamic range compression (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
Registers STA309A
52/67 Doc ID 13855 Rev 4
1110 -7
1111 -4
Table 77. LnRT bits, dynamic range compression
LnRT[3:0] Dynamic range compression (DRC)
(db relative to volume + LnAT)
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
Table 76. LnAT bits, dynamic range compression (continued)
LnAT[3:0] Dynamic range compression (DRC)
(dB relative to volume)
STA309A Registers
Doc ID 13855 Rev 4 53/67
7.2.53 Channel 1 and 2 output timing (0x33)
7.2.54 Channel 3 and 4 output timing (0x34)
7.2.55 Channel 5 and 6 output timing (0x35)
7.2.56 Channel 7 and 8 output timing (0x36)
The centering of the individual channel PWM output periods can be adjusted by the output
timing registers. PWM slot settings can be chosen to insure that pulse transitions do not
occur at the same time on different channels using the same power device. There are 8
possible settings, the appropriate setting varying based on the application and connections
to the DDX power devices.
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C2OT2 C2OT1 C2OT0 Reserved C1OT2 C1OT1 C1OT0
01000000
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C4OT2 C4OT1 C4OT0 Reserved C3OT2 C3OT1 C3OT0
01100010
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C6OT2 C6OT1 C6OT0 Reserved C5OT2 C5OT1 C5OT0
01010001
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C8OT2 C8OT1 C8OT0 Reserved C7OT2 C7OT1 C7OT0
01110011
Table 78. PWM slot
CnOT[2:0] PWM slot
000 1
001 2
010 3
011 4
100 5
101 6
110 7
111 8
Registers STA309A
54/67 Doc ID 13855 Rev 4
7.2.57 Channel I2S output mapping channels 1 and 2 (0x37)
7.2.58 Channel I2S output mapping channels 3 and 4 (0x38)
7.2.59 Channel I2S output mapping channels 5 and 6 (0x39)
7.2.60 Channel I2S output mapping channels 7 and 8 (0x3A)
Each I2S output channel can receive data from any channel output of the volume block.
Which channel a particular I2S output receives is dependent upon that channels CnOM
register bits.
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C2OM2 C2OM1 C2OM0 Reserved C1OM2 C1OM1 C1OM0
00010000
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C4OM2 C4OM1 C4OM0 Reserved C3OM2 C3OM1 C3OM0
00110010
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C6OM2 C6OM1 C6OM0 Reserved C5OM2 C5OM1 C5OM0
01010100
D7 D6 D5 D4 D3 D2 D1 D0
Reserved C8OM2 C8M1 C8OM0 Reserved C7OM2 C7OM1 C7OM0
01110110
Table 79. CnOM serial output
CnOM[2:0] Serial output from
000 Channel 1
001 Channel 2
010 Channel 3
011 Channel 4
100 Channel 5
101 Channel 6
110 Channel 7
111 Channel 8
STA309A Registers
Doc ID 13855 Rev 4 55/67
7.2.61 Coefficient address register 1 (0x3B)
7.2.62 Coefficient address register 2 (0x3C)
7.2.63 Coefficient b1 data register, bits 23:16 (0x3D)
7.2.64 Coefficient b1 data register, bits 15:8 (0x3E)
7.2.65 Coefficient b1 data register, bits 7:0 (0x3F)
7.2.66 Coefficient b2 data register, bits 23:16 (0x40)
7.2.67 Coefficient b2 data register, bits 15:8 (0x41)
D7 D6 D5 D4 D3 D2 D1 D0
Reserved CFA9 CFA8
00000000
D7 D6 D5 D4 D3 D2 D1 D0
CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8
00000000
Registers STA309A
56/67 Doc ID 13855 Rev 4
7.2.68 Coefficient b2 data register, bits 7:0 (0x42)
7.2.69 Coefficient a1 data register, bits 23:16 (0x43)
7.2.70 Coefficient a1 data register, bits 15:8 (0x44)
7.2.71 Coefficient a1 data register, bits 7:0 (0x45)
7.2.72 Coefficient a2 data register, bits 23:16 (0x46)
7.2.73 Coefficient a2 data register, bits 15:8 (0x47)
7.2.74 Coefficient a2 data register, bits 7:0 (0x48)
7.2.75 Coefficient b0 data register, bits 23:16 (0x49)
D7 D6 D5 D4 D3 D2 D1 D0
C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C3B23 C3B22 C3B21 C3B20 C3B19 C3B18 C3B17 C3B16
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C3B7 C3B6 C3B5 C3B4 C3B3 C3B2 C3B1 C3B0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C4B15 C4B14 C4B13 C4B12 C4B11 C4B10 C4B9 C4B8
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C4B7 C4B6 C4B5 C4B4 C4B3 C4B2 C4B1 C4B0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16
00000000
STA309A Registers
Doc ID 13855 Rev 4 57/67
7.2.76 Coefficient b0 data register, bits 15:8 (0x4A)
7.2.77 Coefficient b0 data register, bits 7:0 (0x4B)
7.2.78 Coefficient write control register (0x4C)
Coefficients for EQ and bass management are handled internally in the STA309A via RAM.
Access to this RAM is available to the user via an I2C register interface.
A collection of I2C registers are dedicated to this function. One contains a coefficient base
address, five sets of three store the values of the 24-bit coefficients to be written or that were
read, and one contains bits used to control the write of the coefficient(s) to RAM. The
following are instructions for reading and writing coefficients.
D7 D6 D5 D4 D3 D2 D1 D0
C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8
00000000
D7 D6 D5 D4 D3 D2 D1 D0
C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0
00000000
D7 D6 D5 D4 D3 D2 D1 D0
Reserved WA W1
00000000
Registers STA309A
58/67 Doc ID 13855 Rev 4
7.3 Reading a coefficient from RAM
1. write top 2-bits of address to I2C register 0x3B
2. write bottom 8-bits of address to I2C register 0x3C
3. read top 8-bits of coefficient in I2C address 0x3D
4. read middle 8-bits of coefficient in I2C address 0x3E
5. read bottom 8-bits of coefficient in I2C address 0x3F
7.4 Reading a set of coefficients from RAM
1. write top 2-bits of address to I2C register 0x3B
2. write bottom 8-bits of address to I2C register 0x3C
3. read top 8-bits of coefficient in I2C address 0x3D
4. read middle 8-bits of coefficient in I2C address 0x3E
5. read bottom 8-bits of coefficient in I2C address 0x3F
6. read top 8-bits of coefficient b2 in I2C address 0x40
7. read middle 8-bits of coefficient b2 in I2C address 0x41
8. read bottom 8-bits of coefficient b2 in I2C address 0x42
9. read top 8-bits of coefficient a1 in I2C address 0x43
10. read middle 8-bits of coefficient a1 in I2C address 0x44
11. read bottom 8-bits of coefficient a1 in I2C address 0x45
12. read top 8-bits of coefficient a2 in I2C address 0x46
13. read middle 8-bits of coefficient a2 in I2C address 0x47
14. read bottom 8-bits of coefficient a2 in I2C address 0x48
15. read top 8-bits of coefficient b0 in I2C address 0x49
16. read middle 8-bits of coefficient b0 in I2C address 0x4A
17. read bottom 8-bits of coefficient b0 in I2C address 0x4B
7.5 Writing a single coefficient to RAM
1. write top 2-bits of address to I2C register 0x3B
2. write bottom 8-bits of address to I2C register 0x3C
3. write top 8-bits of coefficient in I2C address 0x3D
4. write middle 8-bits of coefficient in I2C address 0x3E
5. write bottom 8-bits of coefficient in I2C address 0x3F
6. write 1 to W1 bit in I2C address 0x4C
STA309A Registers
Doc ID 13855 Rev 4 59/67
7.6 Writing a set of coefficients to RAM
1. write top 2-bits of starting address to I2C register 0x3B
2. write bottom 8-bits of starting address to I2C register 0x3C
3. write top 8-bits of coefficient b1 in I2C address 0x3D
4. write middle 8-bits of coefficient b1 in I2C address 0x3E
5. write bottom 8-bits of coefficient b1 in I2C address 0x3F
6. write top 8-bits of coefficient b2 in I2C address 0x40
7. write middle 8-bits of coefficient b2 in I2C address 0x41
8. write bottom 8-bits of coefficient b2 in I2C address 0x42
9. write top 8-bits of coefficient a1 in I2C address 0x43
10. write middle 8-bits of coefficient a1 in I2C address 0x44
11. write bottom 8-bits of coefficient a1 in I2C address 0x45
12. write top 8-bits of coefficient a2 in I2C address 0x46
13. write middle 8-bits of coefficient a2 in I2C address 0x47
14. write bottom 8-bits of coefficient a2 in I2C address 0x48
15. write top 8-bits of coefficient b0 in I2C address 0x49
16. write middle 8-bits of coefficient b0 in I2C address 0x4A
17. write bottom 8-bits of coefficient b0 in I2C address 0x4B
18. write 1 to WA bit in I2C address 0x4C
The mechanism for writing a set of coefficients to RAM provides a method of updating the
five coefficients corresponding to a given biquad (filter) simultaneously to avoid possible
unpleasant acoustic side-effects.
When using this technique, the 10-bit address would specify the address of the biquad b1
coefficient (for example, decimals 0, 5, 10, 15, …, 100, … 395), and the STA309A will
generate the RAM addresses as offsets from this base value to write the complete set of
coefficient data.
Equalization and mixing STA309A
60/67 Doc ID 13855 Rev 4
8 Equalization and mixing
Figure 8. Channel mixer
8.1 Postscale
The STA309A provides one additional multiplication after the last interpolation stage and
before the distortion compensation on each channel. This is a 24-bit signed fractional
multiply.
The scale factor for this multiply is loaded into RAM using the same I2C registers as the
biquad coefficients and the bass-management.
This postscale factor can be used in conjunction with an ADC equipped micro-controller to
perform power-supply error correction. All channels can use the channel 1 by setting the
postscale link bit.
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
CxMIX1
CxMIX2
CxMIX3
CxMIX4
CxMIX5
CxMIX6
CxMIX7
CxMIX8
Channel x
Table 80. RAM block for biquads, mixing, and bass management
Index
(decimal)
Index
(hex) Description Coefficient Default
0 0x00 Channel 1 - Biquad 1 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
STA309A Equalization and mixing
Doc ID 13855 Rev 4 61/67
……… … …
49 0x31 Channel 1 - Biquad 10 C1HA4 0x400000
50 0x32 Channel 2 - Biquad 1 C2H10 0x000000
51 0x33 - C2H11 0x000000
……… … …
99 0x63 Channel 2 - Biquad 10 C2HA4 0x4000000
100 0x64 Channel 3 - Biquad 1 C3H10 0x000000
……… … …
399 0x18F Channel 8 - Biquad 10 C8HA4 0x400000
400 0x190 Channel 1 - Prescale C1PreS 0x7FFFFF
401 0x191 Channel 2 - Prescale C2PreS 0x7FFFFF
402 0x192 Channel 3 - Prescale C3PreS 0x7FFFFF
……… … …
407 0x197 Channel 8 - Prescale C8PreS 0x7FFFFF
408 0x198 Channel 1 - Postscale C1PstS 0x7FFFFF
409 0x199 Channel 2 - Postscale C2PstS 0x7FFFFF
……… … …
415 0x19F Channel 8 - Postscale C8PstS 0x7FFFFF
416 0x1A0 Channel 1 - Mix#1 1 C1MX11 0x7FFFFF
417 0x1A1 Channel 1 - Mix#1 2 C1MX12 0x000000
……… … …
423 0x1A7 Channel 1 - Mix#1 8 C1MX18 0x000000
424 0x1A8 Channel 2 - Mix#1 1 C2MX11 0x000000
425 0x1A9 Channel 2 - Mix#1 2 C2MX12 0x7FFFFF
……… … …
479 0x1DF Channel 8 - Mix#1 8 C8MX18 0x7FFFFF
480 0x1E0 Channel 1 - Mix#2 1 C1MX21 0x7FFFFF
481 0x1E1 Channel 1 - Mix#2 2 C1MX22 0x000000
……… … …
487 0x1E7 Channel 1 - Mix#2 8 C1MX28 0x000000
488 0x1E8 Channel 2 - Mix#2 1 C2MX21 0x000000
489 0x1E9 Channel 2 - Mix#2 2 C2MX22 0x7FFFFF
……… … …
543 0x21F Channel 8 - Mix#2 8 C8MX28 0x7FFFFF
Table 80. RAM block for biquads, mixing, and bass management (continued)
Index
(decimal)
Index
(hex) Description Coefficient Default
Equalization and mixing STA309A
62/67 Doc ID 13855 Rev 4
8.2 Variable max power correction
8.2.1 MPCC1-2 (0x4D, 0x4E)
MPCC bits determine the 16 MSBs of the MPC compensation coefficient. This coefficient is
used in place of the default coefficient when MPCV = 1.
8.3 Variable distortion compensation
8.3.1 DCC1-2 (0x4F, 0x50)
DCC bits determine the 16 MSBs of the distortion compensation coefficient. This coefficient
is used in place of the default coefficient when DCCV = 1.
D7 D6 D5 D4 D3 D2 D1 D0
MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8
00101101
D7 D6 D5 D4 D3 D2 D1 D0
MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0
11000000
D7 D6 D5 D4 D3 D2 D1 D0
DCC15 DCC14 DCC13 DCC12 DCC11 DCC10 DCC9 DCC8
11110011
D7 D6 D5 D4 D3 D2 D1 D0
DCC7 DCC6 DCC5 DCC4 DCC3 DCC2 DCC1 DCC0
00110011
STA309A Equalization and mixing
Doc ID 13855 Rev 4 63/67
8.4 PSCorrect registers
ADC is used to input ripple data to SDI78. The left channel (7) is used internally. No audio
data can therefore be used on these channels. Though all channel mapping and mixing
from other inputs to channels 7 and 8 internally are still valid.
8.4.1 PSC1-2: ripple correction value (RCV) (0x51, 0x52)
Equivalent to negative maximum ripple peak as a percentage of Vcc (MPR), scaled by the
inverse of maximum ripple p-p as percentage of full-scale analog input to ADC.
Represented as a 1.11 signed fractional number.
8.4.2 PSC3: correction normalization value (CNV) (0x53)
Equivalent to 1 / (1+MPR) expressed as a 0.12 unsigned fractional number.
D7 D6 D5 D4 D3 D2 D1 D0
RCV11 RCV10 RCV9 RCV8 RCV7 RCV6 RCV5 RCV4
00000000
D7 D6 D5 D4 D3 D2 D1 D0
RCV3 RCV2 RCV1 RCV0 CNV11 CNV10 CNV9 CNV8
00001111
D7 D6 D5 D4 D3 D2 D1 D0
CNV7 CNV6 CNV5 CNV4 CNV3 CNV2 CNV1 CNV0
11111111
Package mechanical data STA309A
64/67 Doc ID 13855 Rev 4
9 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 9. TQFP64 (10 x 10 x 1.4 mm) package dimensions
OUTLINE AND
MECHANICAL DATA
A
A2
A1
B
C
16
17
32
33
48
49
64
E3
D3
E1
E
D1
D
e
1
K
B
TQFP64
L
L1
Seating Plane
0.08mm
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.60 0.063
A1 0.05 0.15 0.002 0.006
A2 1.35 1.40 1.45 0.053 0.055 0.057
B 0.17 0.22 0.27 0.0066 0.0086 0.0106
C 0.09 0.0035
D 11.80 12.00 12.20 0.464 0.472 0.480
D1 9.80 10.00 10.20 0.386 0.394 0.401
D3 7.50 0.295
e 0.50 0.0197
E 11.80 12.00 12.20 0.464 0.472 0.480
E1 9.80 10.00 10.20 0.386 0.394 0.401
E3 7.50 0.295
L 0.45 0.60 0.75 0.0177 0.0236 0.0295
L1 1.00 0.0393
K 0˚ (min.), 3.5˚ (min.), 7˚(max.)
ccc 0.080 0.0031
TQFP64 (10 x 10 x 1.4mm)
0051434 E
ccc
Dimension
mm Inch
Min Typ Max Min Typ Max
A --1.60--0.063
A1 0.05 - 0.15 0.002 - 0.006
A2 1.351.401.450.0530.055 0.057
B 0.17 0.22 0.27 0.007 0.0090.011
C0.09--0.003--
D 11.80 12.00 12.20 0.464 0.472 0.480
D1 9.80 10.00 10.20 0.3860.394 0.401
D3-7.50--0.295-
e - 0.50 - - 0.020 -
E 11.80 12.00 12.20 0.464 0.472 0.480
E1 9.80 10.00 10.20 0.3860.394 0.401
E2 -7.50--0.295-
L 0.45 0.60 0.75 0.0180.024 0.030
L1 -1.00--0.039 -
K
(degrees)03.5 7.0 0 3.5 7.0
ccc - - 0.08- - 0.003
STA309A Trademarks and other acknowledgements
Doc ID 13855 Rev 4 65/67
10 Trademarks and other acknowledgements
DDX is a registered trademark of Apogee Technology Inc.
Automode is a trademark of Apogee Technology Inc.
Dolby is a registered trademark of Dolby Laboratories.
ECOPACK is a registered trademark of STMicroelectronics.
Revision history STA309A
66/67 Doc ID 13855 Rev 4
11 Revision history
Table 81. Document revision history
Date Revision Changes
Sep-2007 1Initial release.
15-Jul-2009 2
Added second order code to Table 1 on page 1
Updated applications schematic in Chapter 6 on page 18
Updated register description and reset value for bit AMPS in
register AUTO3 on page 41
Corrected bit names in Coefficient a1 data register, bits 23:16
(0x43) on page 56
Updated RAM block index values which are greater than index =
425 in Table 80 on page 60
Added Dolby in Chapter 10: Trademarks and other
acknowledgements on page 65
18-Sep-2009 3
Updated description of bitfield AMGC in register AUTO1 on
page 39
Updated description of bit AMPS in register AUTO3 on page 41
12-Oct-2009 4 Updated description of Configuration register A (0x00) on
page 22
STA309A
Doc ID 13855 Rev 4 67/67
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