54
HCD-XG80/XG700
Pin No.
Pin Name
I/O
Description
44 to 66 SEG-1 to SEG-23
O
Segment drive signal output to the fluorescent indicator tube (FL601)
67
LED STANDBY
O
LED drive signal output of the I/
1
indicator (D601) “H”: LED on
68
VKK
—
Power supply terminal (–35V) (for fluorescent indicator tube drive)
69
VDD
—
Power supply terminal (+5V)
70
XIN
I
System clock input terminal (12.5 MHz)
71
VSS
—
Ground terminal
72
XOUT
O
System clock output terminal (12.5 MHz)
73
RESET
I
System reset signal input from the reset signal generator (IC801) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
74
JOG A
I
Jog dial pulse input from the rotary encoder (S763 JOG DIAL) (A phase input)
75
JOG B
I
Jog dial pulse input from the rotary encoder (S763 JOG DIAL) (B phase input)
76
TEST
I
Connected to ground
77
—
—
Not used (open)
78
I2C DATA
I/O
Communication data bus with the system controller (IC501)
79
I2C CLK
I/O
Communication data reading clock signal input or transfer clock signal output with the system
controller (IC501)
80
D-SW
I
CD door open/close detection switch (S742) input terminal “L”: close, “H”: open
Summary of Contents for HCD-XG700
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