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HCD-ZX66i/ZX99i
70
PANEL COM BOARD IC901 MB90M407PF-G-146E1 (VACUUM FLUORESCENT DISPLAY DRIVER, KEY CONTROL)
Pin No.
Pin Name
I/O
Description
1 to 4
G4 to G1
O
Grid drive signal output for the vacuum
fl
uorescent display
5 to 10
SEG-1 to SEG-6
O
Segment drive signal output for the vacuum
fl
uorescent display
11
VSS-IO
—
Ground (for I/O port)
12 to 22
SEG-7 to SEG-17
O
Segment drive signal output for the vacuum
fl
uorescent display
23
VDD-FIP
—
Power supply pin (+3.3 V) (for the vacuum
fl
uorescent display)
24 to 41
SEG-18 to SEG-35
O
Segment drive signal output for the vacuum
fl
uorescent display
42
VSS-IO
—
Ground (for I/O port)
43
SEG-36
O
Segment drive signal output for the vacuum
fl
uorescent display
44
NC
O
Not used. (Open)
45
SPK MODE LED
O
Dynamic LED drive signal output of the X-ROUND indicator (H: LED on)
46
CD LED
O
Not used. (Open)
47
GAME LED
O
Not used. (Open)
48
VKK
—
Power supply pin (-33 V) (for the vacuum
fl
uorescent display)
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 1, 2 indicators (H: LED on)
53
VOL 3, 4
O
Dynamic LED drive signal output of the ILLUMINATION 3, 4 indicators (H: LED on)
54
VOL 5, 6
O
Dynamic LED drive signal output of the ILLUMINATION 5, 6 indicators (H: LED on)
55
VOL 7, 8
O
Dynamic LED drive signal output of the ILLUMINATION 7, 8 indicators (H: LED on)
56
VOL 9, 10
O
Dynamic LED drive signal output of the ILLUMINATION 9, 10 indicators (H: LED on)
57
VOL 11 LED
O
Dynamic LED drive signal output of the ILLUMINATION 11 indicator (H: LED on)
58
NC
O
Not used. (Open)
59
LED SELECTOR
O
Dynamic LED drive select signal output
60
I2C DATA
I/O
Data input/output with I2C communication between the system control IC and display control
IC
61
I2C CLOCK
I/O
Clock signal input/output with I2C communication between the system control IC and display
control IC
62
AVCC
—
Power supply pin (+3.3 V) (for A/D conversion)
63
AVSS
—
Ground (for A/D conversion)
64 to 69
KEY0 to KEY5
I
Key signal input (A/D input)
70
BPF1-F01
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass
fi
lter IC (A/D
input)
71
BPF1-F02
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass
fi
lter IC (A/D
input)
72
BPF1-F03
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass
fi
lter IC (A/D
input)
73
BPF1-F04
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass
fi
lter IC (A/D
input)
74
ALL BAND
I
Spectrum analyzer drive signal input from the spectrum analyzer band-pass
fi
lter IC (A/D
input)
75
JOG A
I
JOG dial pulse signal input from X-ROUND JOG rotary encoder (A phase input) (HCD-
ZX99i)
76
JOG B
I
JOG dial pulse signal input from X-ROUND JOG rotary encoder (B phase input) (HCD-
ZX99i)
77
RESET
I
System reset signal input from the system control IC (L: reset)
78
SOFT TEST
O
Output for the software test point
79
VOL B
I
JOG dial pulse signal input from VOLUME rotary encoder (B phase input)
80
VOL A
I
JOG dial pulse signal input from VOLUME rotary encoder (A phase input)
81
VSS-CPU
—
Ground (for CPU)
82
X OUT
O
System clock signal output (4 MHz)
83
X IN
I
System clock signal input (4 MHz)
84
VCC-CPU
—
Power supply pin (+3.3 V) (for CPU)
85
NO USE
O
Not used. (Open)
86 to 100
G19 to G5
O
Grid drive signal output for the vacuum
fl
uorescent display