No.7713-7/15
LC74986NWF, 74986NWV
Pin Symbol I/O and type Function Notes
number I/O Type
1 DVSS P — Digital system ground
2 PLLHIO O gqcio19 Input or external PLL divided clock output The divider ratio can be set over the I2C bus.
3 CLKIO O gqcio20 Outputs the input clock Has the same period as the input system. The output can be
inverted by a setting controllable over the I2C bus.
4 CLKIEN I gqcio02 Port A system input clock enable This input is normally held fixed at the high level. (Positive
logic.)
5 CLKI I gqcio02 Port A system input clock Input signal pixel clock
6 AVDD P — Analog system power supply: 3.3V Connect to DVDD2 if unused.
7 AVSS P — Analog system ground
8 VCOCNT1 I gqcio10 PLL VCO control voltage input Connect to AVSS if unused.
9 VCORNG1 I gqcio10 PLL range setting resistor connection Connect to AVSS if unused.
10 PDO1 O gqcio09 PLL phase comparator output Leave open if unused.
11 DVDD1 P — Digital system power supply: 2.5V (1.8V)
12 DVSS P — Digital system ground
13 SDA B gqcio22 I2C bus data
Used for setting internal registers and for reading out IC status.
14 SCL I gqcio03 I2C bus clock Also used for OSD control and gamma correction settings.
15 I2CSEL I gqcio18 I2C bus slave address switching Normally left open (slave address: 70h) or connected to
DVSS.
16 MUTE I gqcio02 Muting control Inverted logic
17 AICS (VPBV) I gqcio03 Chip select or port B system vertical sync Three-wire bus: use is optional.
signal Only used for OSD control (Normally, the I2C bus is used.)
18 AIDA I gqcio03 Data The AICS pin uses inverted logic.
19 AICK I gqcio03 Clock VPBP can be used by setting a register.
20 RST I gqcio03 Initial reset Inverted logic
21 PDOWN1 I gqcio02 Power down Normally held fixed at the high level (Used for testing.)
22
PDOWN2 (VPBV)
I gqcio03 Power down or port B system vertical sync (Used for testing.) VPBV can be used by setting a register.
signal
23 DVDD1 P — Digital system power supply: 2.5V (1.8V)
24 DVSS P — Digital system ground
25 XTAL I gqcio02 Clock input for the detection functions Connection for the fixed-frequency oscillator
26 DCLKI I gqcio02 Display clock input Display processing pixel clock
27 DVDD1 P — Digital system power supply: 2.5V (1.8V)
28 DVSS P — Digital system ground
29 DVSS P — Digital system ground
30 DVSS P — Digital system ground
31 VPBCK I gqcio02 Port B system input clock Port B system input signal pixel clock
32 DVDD1 P — Digital system power supply: 2.5V (1.8V)
33 DVSS P — Digital system ground
34 DCLK0 O gqcio20 LCD panel module clock output Has the same period as DCLKI.
Alternatively, may have 1/2 the period.
35 VPBH I gqcio03 Port B system horizontal sync signal Port B system input horizontal sync signal
36 DVDD1 P — Digital system power supply: 2.5V (1.8V)
37 DVSS P — Digital system ground
38 DEHO O gqcio19 FPD module horizontal enable The polarity can be selected over the I2C bus.
39 DEVO O gqcio19 FPD module vertical enable A composite signal can be output from DEVO.
40 HSO O gqcio19 FPD module horizontal sync signal The polarity and pulse width can be set over the I2C bus.
41 VSO O gqcio19 FPD module vertical sync signal A composite sync signal can be output from VSO.
42 DVDD2 P — Digital system power supply: 3.3V
43 DVSS P — Digital system ground
44 ROUT0 O gqcio19 FPD module R output LSB
45 ROUT1 O gqcio19 (The ROUT5:0 pins are used for 6-bit output.)
46 ROUT2 O gqcio19 When 2-phase output is used, the first byte is data.
47 ROUT3 O gqcio19 (MSB when 6-bit output is selected)
48 ROUT4 O gqcio19
49 ROUT5 O gqcio19
50 ROUT6 O gqcio19
51 ROUT7 O gqcio19 MSB
52 DVDD2 P — Digital system power supply: 3.3V
53 DVSS P — Digital system ground
Pin Functions Items in parentheses apply to the LC74986NWV.
Continued on next page.