CDX-GT72W/GT720/GT770
41
DISPLAY BOARD IC901 M30876FJBA03GP (DISPLAY CONTROL)
Pin No.
Pin Name
I/O
Description
1
SYS CE
I
Main chip enable signal input
2
NC
O
Not used. (Open)
3
FL DAT3
O
Fluorescent indicator tube serial data signal output 3
4
NC
O
Not used. (Open)
5
FL CLK IN
I
Fluorescent indicator tube serial clock signal input
6
BYTE
I
Connect to ground. (Fixed to “L”.)
7
CNVSS
I
Port for
fl
ash write H (write switch) Normally operation: “L”
8, 9
NC
O
Not used. (Open)
10
RESET
I
Reset signal input
11
XOUT
O
Main clock signal output (6.75 MHz)
12
VSS
—
Ground pin
13
XIN
I
Main clock signal input (6.75 MHz)
14
VCC1
—
Power supply pin (+3.3 V)
15
NMI
I
Non-maskable interruption signal input Fixed to “H” for external pull-up resistor.
16 to 18
NC
O
Not used. (Open)
19
GCP TA4 IN
I
Fluorescent indicator tube GCP TA4 signal input
20, 21
NC
O
Not used. (Open)
22
BK TA3 OUT
O
Fluorescent indicator tube BK TA3 signal output
23
NC
O
Not used. (Open)
24
LAT TA2 OUT
O
Fluorescent indicator tube latch TA2 signal output
25
NC
O
Not used. (Open)
26
BLINK
O
BLINK control signal output Normally operation: “H”
27
NC
O
Not used. (Open)
28
GCP TA0 OUT
O
Fluorescent indicator tube GCP TA0 signal output
29
SYS SO
O
Main serial data signal output
30
SYS SI
I
Main serial data signal input
31
SYS CLK
I
Main serial clock signal input
32
NC
O
Not used. (Open)
33
FL DAT1
O
Fluorescent indicator tube serial data signal output 1
34
NC
O
Not used. (Open)
35
FL CLK IN
I
Fluorescent indicator tube serial clock signal input
36 to 38
NC
O
Not used. (Open)
39
HOLD
I
External data bus (Hold) signal input Fixed to “L” for external pull-down resistor.
40 to 43
NC
O
Not used. (Open)
44
WRI/WR
I
External data bus (WRI/WR) signal input Fixed to “H” for external pull-up resistor.
45 to 59
NC
O
Not used. (Open)
60
VCC2
—
Power supply pin (+3.3 V)
61
NC
O
Not used. (Open)
62
VSS
—
Ground pin
63 to 70
NC
O
Not used. (Open)
71
PLUG IN
I
AUX plug detect signal input
72 to 77
NC
O
Not used. (Open)
78
KEY PUSH
I
Rotary encoder push key detect signal input
79 to 84
NC
O
Not used. (Open)
85
KEY 1
I
Key signal input 1
86
KEY 2
I
Key signal input 2
87, 88
NC
O
Not used. (Open)
89
SIRCS
I
SIRCS data signal input
90
ILL GREEN
O
Illumination (green) change control signal output
91
ILL BLUE
O
Illumination (blue) change control signal output
92
ILL RED
O
Illumination (red) change control signal output
93
NC
O
Not used. (Open)
