Sony CFD-K10 Service Manual page 70

cFp-K1o
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Pin No. Name
t/o
Pin Description
63
XRST
o
Terminals used as 4-bit output-only port (the inverter and pull-up resistor of tlre output
64
12/24
OJ
MD STOP
format are programmable) and for LCD segment signal output.
66
HI SPEED
ERASE
67
PEN
o
Terminals used as 4-bit output-only port (output format same as port C) and for LCD
68
LATCH
(FADER)
69
POWER ON
segment signal output.
70 SLEEP ON
t l
VSS GND terminal
72 TX
o
Clock generator circuit output.
,72
N C
(Not used)
74
TEX
I
32kHz timer clock generator circuit input terminal. Connect a 32.768kH2 quartz oscillât-
ing element between TEX and TX. To use as an event clock input, connect the clock
oscillator source to the TEX terminal and leave the TX terminal open.
VREF
I
Reference voltage input for power supply voltage reset circuit. Normally connected to a
zener diode.
76-79
PORT H/
SEGMENT
o
Terminals used as 4-bit output-only port (output format same as port C) and for LCD
segment signal output (bit-level designation supported).
80
PORT G/
SEGMENT
( ,
Terminal used as 4-bit output-only port (output format same as port C) and for LCD
segment signal output.
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