65
HCD-GX355/GX555/RG270/RG475/RG575
PANEL BOARD IC701
µ
PD780232GC-508-8BT-A (FL/LED DRIVER)
Pin No.
Pin Name
I/O
Description
1
VDD1
-
Power supply terminal (+3.3V)
2
VSS1
-
Ground terminal
3
X1
I
System clock input terminal (4.19 MHz)
4
X2
O
System clock output terminal (4.19 MHz)
5
IC
I
Not used
6
RESET
I
System reset signal input from the system controller "L": reset
7
SCK1
I
Serial data transfer clock signal input from the system controller
8
SI1
O
Serial data output to the system controller
9
SO1
I
Serial data input from the system controller
10 to 15
NC
I
Not used
16
CE
I
Chip select signal input from the system controller
17
NC
I
Not used
18
AVSS
-
Ground terminal
19 to 22
KEY1 to KEY4
I
Front panel key input terminal (A/D input)
23
VSS0
-
Ground terminal
24
AVDD
-
Power supply terminal (+5V)
25
VDD0
-
Power supply terminal (+5V)
26 to 31
STREAM LED1 to
STREAM LED6
O
LED drive signal output terminal
32
SW LED
O
LED drive signal output terminal
33 to 44
NC
I
Not used
45 to 58
S1 to S14
O
Segment drive signal output to the fluorescent indicator tube
59
VDD2
-
Power supply terminal (+5V)
60
VLOD
-
Power supply terminal (for fluorescent indicator tube drive)
61 to 67
S15 to S21
O
Segment drive signal output to the fluorescent indicator tube
68 to 80
G1 to G13
O
Grid drive signal output to the fluorescent indicator tube
