Sony CDX-GT72W Service Manual page 41

DISPLAY BOARD IC901 M30876FJBA03GP (DISPLAY CONTROL)
Pin No. Pin Name
1 SYS CE
2 NC
3 FL DAT3
4 NC
5 FL CLK IN
6 BYTE
7 CNVSS
8, 9 NC
10 RESET
11 XOUT
12 VSS
13 XIN
14 VCC1
15 NMI
16 to 18 NC
19 GCP TA4 IN
20, 21 NC
22 BK TA3 OUT
23 NC
24 LAT TA2 OUT
25 NC
26 BLINK
27 NC
28 GCP TA0 OUT
29 SYS SO
30 SYS SI
31 SYS CLK
32 NC
33 FL DAT1
34 NC
35 FL CLK IN
36 to 38 NC
39 HOLD
40 to 43 NC
44 WRI/WR
45 to 59 NC
60 VCC2
61 NC
62 VSS
63 to 70 NC
71 PLUG IN
72 to 77 NC
78 KEY PUSH
79 to 84 NC
85 KEY 1
86 KEY 2
87, 88 NC
89 SIRCS
90 ILL GREEN
91 ILL BLUE
92 ILL RED
93 NC
I/O
I Main chip enable signal input
O Not used. (Open)
O Fluorescent indicator tube serial data signal output 3
O Not used. (Open)
I Fluorescent indicator tube serial clock signal input
I Connect to ground. (Fixed to "L".)
I Port for fl ash write H (write switch)
O Not used. (Open)
I Reset signal input
O Main clock signal output (6.75 MHz)
— Ground pin
I Main clock signal input (6.75 MHz)
— Power supply pin (+3.3 V)
I Non-maskable interruption signal input
O Not used. (Open)
I Fluorescent indicator tube GCP TA4 signal input
O Not used. (Open)
O Fluorescent indicator tube BK TA3 signal output
O Not used. (Open)
O Fluorescent indicator tube latch TA2 signal output
O Not used. (Open)
O BLINK control signal output
O Not used. (Open)
O Fluorescent indicator tube GCP TA0 signal output
O Main serial data signal output
I Main serial data signal input
I Main serial clock signal input
O Not used. (Open)
O Fluorescent indicator tube serial data signal output 1
O Not used. (Open)
I Fluorescent indicator tube serial clock signal input
O Not used. (Open)
I External data bus (Hold) signal input
O Not used. (Open)
I External data bus (WRI/WR) signal input
O Not used. (Open)
— Power supply pin (+3.3 V)
O Not used. (Open)
— Ground pin
O Not used. (Open)
I AUX plug detect signal input
O Not used. (Open)
I Rotary encoder push key detect signal input
O Not used. (Open)
I Key signal input 1
I Key signal input 2
O Not used. (Open)
I SIRCS data signal input
O Illumination (green) change control signal output
O Illumination (blue) change control signal output
O Illumination (red) change control signal output
O Not used. (Open)
CDX-GT72W/GT720/GT770
Description
Normally operation: "L"
Fixed to "H" for external pull-up resistor.
Normally operation: "H"
Fixed to "L" for external pull-down resistor.
Fixed to "H" for external pull-up resistor.
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