Icom IC-M802 Service Manual page 17

3-7-8 FRONT CPU PORT ALLOCATIONS (RC-25,
DISPLAY BOARD; IC8201)
Pin Port
number name
Outputs DISTRESS LED control sig-
17 DSEL
nal.
Input port for the O switch.
21 FUNK
22 TXK Input port for the [TX] switch.
23 RXK Input port for the [RX] switch.
24 FCHK Input port for the [FREQ/CH] switch.
25 T0K Input port for the [0] switch.
26 ENTK Input port for the [ENT] switch.
28 PWRK Input port for the [POWER] switch.
Input port for the phone plug insert
31 PMUT
detection signal.
Input port for the [PTT] switch from the
32 FPTT
microphone connector (J8701, pin 5).
33 AFGL
Input port for the AF volume control.
Input port for the using microphone
34 M1AD
detection signal.
Input port for the switch signal on the
35 M2AD
microphone.
Input port for the microphone connect-
36 M3AD
ing detection.
CL1
RS
RD
41–46 Output LCD drive signals.
WR
RES
CS
48–55 DB7–DB0 Output LCD drive signals.
57 T9K Input port for the [9] switch.
58 T8K Input port for the [8] swtich.
59 T7K Input port for the [7] swtich.
60 T6K Input port for the [6] switch.
61 T5K Input port for the [5] switch.
62 T4K Input port for the [4] switch.
63 T3K Input port for the [3] switch.
64 T2K Input port for the [2] switch.
65 T1K Input port for the [1] switch.
Input port for [e-mail]/[DSC]/[TS]
66 EMLK
switches.
67 SETK Input port for the [SET] switch.
68 MODK Input port for the [MODE] switch.
69 TUNK Input port for the [TUNE] switch.
Input port for [CANCEL]/[TELCALL]/
70 DALK
[TXF] switches.
Input port for [DSC]/[CALL]/[CH0]/
71 CSCK
[SELCALL] switches.
Input port for the [DISTRESS]/[CALL]/
72 DSTK
[ALM] switches.
Description
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