69
HCD-ZX9
• IC901 MB90M407PF-G-142-BNDE1 (SYSTEM CONTROL) (PANEL BOARD)
Pin No.
Pin Name
I/O
Pin Description
1 to 4
G4 to G1
O
Grid drive signal output to the fluorescent indicator tube
5 to 10
SEG-1 to SEG-6
O
Segment drive signal output to the fluorescent indicator tube
11
VSS-IO
—
Ground pin (for I/O port)
12 to 22
SEG-7 to SEG-17
O
Segment drive signal output to the fluorescent indicator tube
23
VDD-FIP
—
Power supply pin (+3.3 V) (for fluorescent indicator tube)
24 to 41
SEG-18 to SEG-35
O
Segment drive signal output to the fluorescent indicator tube
42
VSS-IO
—
Ground pin (for I/O port)
43
SEG-36
O
Segment drive signal output to the fluorescent indicator tube
44
TAPE A LED
O
Dynamic LED drive signal output of the TAPE A FWD PLAY indicator and TAPE
A REV PLAY indicator “H”: LED on
45
SPK MODE LED
O
Dynamic LED drive signal output of the X-ROUND indicator “H”: LED on
46
CD LED
O
Dynamic LED drive signal output of the CD PLAY PAUSE indicator “H”: LED on
47
GAME, REC LED
O
Dynamic LED drive signal output of the GAME indicator and REC PAUSE indicator
“H”: LED on
48
VKK
—
Power supply pin (–33 V) (for fluorescent indicator tube)
49
MD0
I
Setting pin for the CPU operational mode
50
MD1/VDD-VFT
I
Setting pin for the CPU operational mode
51
MD2
I
Setting pin for the CPU operational mode
52
VOL 1, 2
O
Dynamic LED drive signal output of the ILLUMINATION 1st indicator and 2nd
indicator “H”: LED on
53
VOL 3, 4
O
Dynamic LED drive signal output of the ILLUMINATION 3rd indicator and 4th
indicator “H”: LED on
54
VOL 5, 6
O
Dynamic LED drive signal output of the ILLUMINATION 5th indicator and 6th
indicator “H”: LED on
55
VOL 7, 8
O
Dynamic LED drive signal output of the ILLUMINATION 7th indicator and 8th
indicator “H”: LED on
56
VOL 9, 10
O
Dynamic LED drive signal output of the ILLUMINATION 9th indicator and 10th
indicator “H”: LED on
57
VOL 11, TUNER BAND
O
Dynamic LED drive signal output of the ILLUMINATION 11th indicator and TUNER
BAND indicator “H”: LED on
58
TAPE B LED
O
Dynamic LED drive signal output of the TAPE B FWD PLAY indicator and TAPE B
REV PLAY indicator “H”: LED on
Dynamic LED drive select signal output
“L”: LED line ILLUMINATION 1, 3, 5, 7, 9, 11, TAPE B REV PLAY, TAPE A REV
59
LED SELECT
O
PLAY, X-ROUND, CD PLAY PAUSE and GAME is selected.
“H”: LED line ILLUMINATION 2, 4, 6, 8, 10, TUNER/BAND, REC PAUSE/START,
TAPE B FWD PLAY and TAPE A FWD PLAY is selected.
60
I2C DAT
I/O
Clock signal for IIC communication between master control IC and display control IC
61
I2C CLK
I/O
Data signal for IIC communication between master control IC and display control IC
62
AVCC
—
Power supply pin (+3.3 V) (for A/D conversion)
63
AVSS
—
Ground pin (for A/D conversion)
64 to 69
KEY 0 to KEY 5
I
Key signal input (A/D input)
70 to 73
BPF1-F01 to BPF3-F04
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter
(A/D input)
74
ALL-BAND
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter
(A/D input)
