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DISPLAY BOARD IC701 CXP82320-077Q (Display Controller)
Pin No.
Pin Name
I/O
Function
1
MODE
I
Fixed at “H” level.
2
RMC
I
Remote control input from IC704.
3
TEST
I
Test mode setting pin
4
A1 METER
O
Address 1 output to IC702.
5
A2 METER
O
Address 2 output to IC702.
6
LED-CLK
O
Pin for CLK output to IC703.
7
ACK
O
Pin for acknowledge output to main microcomputer (IC501).
8
SC
I
Pin for serial clock input from main microcomputer (IC501).
9
SI
I
Pin for serial data input from main microcomputer (IC501).
10
SO
O
Pin for serial data output to main microcomputer (IC501).
11
CS METER
O
Pin for chip select output to IC702.
12
RD METER
O
Pin for read output to IC702.
13
WR METER
O
Pin for write output to IC702.
14
M MUT
I
Level meter mute input pin
15
REM-SEL
O
Pin for remote selector output to IC704.
16 — 19
B1 — B4
I
Pin for shuttle signal input
20
A JOG
I
21
B JOG
I
22 — 29
AD0 — AD7
I
Key input pins
30
XRST
I/O
System reset pin (active “L”)
31
EXTAL
I
System clock input pin
32
XTAL
O
System clock output pin (4.19MHz)
33
VSS
—
Ground
34 — 57
S0 — S23
O
FL tube segment output pins
58 — 70
T12 — T0
O
FL tube grid output pins
71
VFDP
I
Power supply pin (–30V)
72
VDD
—
Power supply pin (+5V)
73
NC
—
Connect to VDD.
74 — 77
D0 — D3
I/O
Pin for data input/output to and from IC702.
78
H
I
Fixed at “H” level.
79
X DISP REQ
I
Pin for comunication request input from main microcomputer (IC501).
80
H
I
Fixed at “H” level.
Pin for jog signal input.
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