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CDX-M620/M670
• IC702 HD643255A36F (SUB SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
1
SA CLK
2
PG4
3
VSS
4
NC
5
VCC
6 – 9
PC0 – PC3
10
VSS
11 – 14
PC4 – PC7
15 – 18
PB0 – PB3
19
VSS
20 – 23
PB4 – PB7
24 – 27
PA0 – PA3
28
VSS
29 – 31
PA4 – PA6
32
SA EN IN
33
SPE LAT
34
BU IN
35, 36
VSS
37
P65
38
BUS ON
39
VCC
40 – 43
PE0 – PE3
44
VSS
45
DSP SEL
46
LED SW1
47
LED SW2
48
PE7
49
BU IN
50
LINK OFF
51
PD2
52
ILL ON
53
VSS
54 – 56
PD4 – PD6
57
BOOT
58
VCC
59
P30
60
LCD SO/TX
61
SP SI
62
RX
63
SP CKI
64
LCD CKO
65
VSS
66
LCD CEO
67, 68
VSS
69
LCD INH
70
LCD CE1
71
LCD CE2
72 – 78
P27 – P21
79
FL W
80
FW E
81
SYS RST
82
NMI
32
I/O
O
Not used. (Open)
O
Not used. (Open)
Ground
Not used. (Open)
Power supply pin (+ 5V)
O
Not used. (Open)
Ground
O
Not used. (Open)
O
Not used. (Open)
Ground
O
Not used. (Open)
O
Not used. (Open)
Ground
O
Not used. (Open)
I
Connecting to ground in this set.
I
Spectrum analyzer data latch signal
I
Back-up power detection signal
Ground
O
Not used. (Open)
I
BUS ON signal
Power supply pin (+5 V)
O
Not used. (Open)
Ground
I
Spectrum analyzer data select signal
I
Illumination select control signal 1
I
Illumination select control signal 2
O
Not used. (Open)
O
Not used. (Open)
O
Link OFF control signal
O
Not used. (Open)
O
Illumination power control signal
Ground
O
Not used. (Open)
I
Display CPU write-in control signal
Power supply pin (+5 V)
O
Not used. (Open)
O
LCD driver serial data output
I
Spectrum analyzer data input
I
Flash CPU write-in data input
I
Spectrum analyzer clock input
O
LCD driver serial clock output
Ground
O
LCD driver chip enable output
Ground
O
LCD driver inhibit control signal
O
LCD driver chip enable output
O
LCD driver chip enable output
O
Not used. (Open)
O
Flash write control signal
I
Flash write enable signal
I
System reset signal
I
Non maskable interrupt signal
Pin Description

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