20
CDX-MP70
• IC702 HD6432398-A02 (DISPLAY CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
SA CLK
O
Spectrum analyzer clock output
2
(NCO)
O
Not used. (Open)
3
VSS
—
Ground
4
(NCO)
—
Not used. (Open)
5
VCC
—
Power supply pin (+5 V)
6 – 9
(NCO)
O
Not used. (Open)
10
VSS
—
Ground
11 – 18
(NCO)
O
Not used. (Open)
19
VSS
—
Ground
20 – 27
(NCO)
O
Not used. (Open)
28
VSS
—
Ground
29 – 32
(NCO)
O
Not used. (Open)
33
SPE LAT
I
Spectrum analyzer LAT signal
34
BU IN
I
Back up voltage detect signal
35, 36
VSS
—
Ground
37
(NCO)
O
Not used. (Open)
38
BUS ON
I
BUS ON signal
39
VCC
—
Power supply pin (+5 V)
40 – 43
(NCO)
O
Not used. (Open)
44
VSS
—
Ground
45 – 48
(NCO)
O
Not used. (Open)
49
SPE
I
Spectrum analyzer enable signal
50
LINK OFF
O
LINK OFF signal
51
(NCO)
O
Not used. (Open)
52
ILL ON
O
Illumination control signal
53
VSS
—
Ground
54 – 56
(NCO)
O
Not used. (Open)
57
BOOT
I
Display CPU write-in control signal
58
VCC
—
Power supply pin (+5 V)
59
(NCO)
O
Not used. (Open)
60
LCD SO/TX
O
LCD data output/UART signal output
61
(NCO)
O
Not used. (Open)
62
RX
I
UART signal input
63
L RST
O
Reset signal
64
LCD CKO
O
LCD clock signal
65
VSS
—
Ground
66
LCD CEO
O
LCD driver chip enable
67, 68
VSS
—
Ground
69 – 78
(NCO)
O
Not used. (Open)
79
FL W
O
Not used. (Open)
80
VCL
I
Connecting to ground through a capacitor.
81
SYS RES
I
Reset signal
82
NMI
I
Non maskable interrupt signal
83
STBY
I
Stanby mode signal
84
VCC
—
Power supply pin (+5 V)
85
XTAL
—
Crystal oscillator (18.432 MHz)
86
EXTAL
—
Crystal oscillator (18.432 MHz)
87
VSS
—
Ground
88
(NCO)
O
Not used. (Open)
89
VCC
—
Power supply pin (+5 V)
90 – 96
(NCO)
O
Not used. (Open)
97
UNI SO
O
Bus data output
