Icom IC-R7100 Service Manual page 19

,
PORT PORT PIN
DESCRIPTION
NUMBER NAME NUM BER
PI S MO 62 Outputs a control signal te r the
[REC REMOTE] jack. This port
becomes
"H IGH "
whe n
the
epu
drives a tape recorde r 1 0 record
recefve
audio.
P16
NB 63
Beoo mes " HIGH" when the
[NB· AFC] switch is ON,
P17 AD
64 Becomes
"HIGH"
when
Ihe [Am
switch Is O N.
P20
LBUSY 75 Inpuls " SUSY " stçnats 10r LCD
d:;vers (1C8. IC9) on the LOGIC
UNIT,
P21 STOP 76
When Ihe port becomes "l OW,"
th e
epu
Is changed to Ihe backup
mode.
P22
DCK
77
Input port Ier the main dial clock
pulses.
P23 DUP 79
Input
port
for
tbe
maln dial UP
slgnal.
P24 DDN 80 In put port lor the mam dia ! DOWN
slgnal.
P24 SOLS 81 Detects a squejch signa!.
When Ihe signal is "LOW." the
equeicb
opens.
P25 VSC
82 Del ec ts
a
ves
stqnat.
Thia port bec ornes "H IGH" when
th e VSC circuit detects an audio
signal.
P27 ADI
83 Inputs ser lat data hom Ihe AIO
converter.
P30 CIVRX 85 Input port for CI·V data.
P31
crvrx
86 Outputs C I-V da ta.
P32
CK B7
Outputs serlat crock signa Is.
P33 DATA BB
Outputs serlal data.
P34 POC 89
Becomes "HIGH" when the tlmet
functlon
turns
the
receiver ON.
P35 BEEP
90 Outputs 1 kHz or 500 Hz SQuare
waves used
Ier
beep tones.
P36 BKIF 91
Outputs a "HIGH" pulse 01
35 msec. width during scanning
when the [LOCK] switch is ON.
P37 LCDCD 92 Outputs command/dala selector
signals for
the
LCD drivers (ICS,
1C9) on the LOGIC UNIT,
P40- ADO- 49-42
Input and output ports for address
P47 AD7
bus data.
PSO- AB -
40- 36 Output porta for the address bus.
P54
A 12
P55 A13
34 Nol used.
P56, A1 4, 33, 32
Outputs selecter
signals 10r the
P57
AIS RAM IC (IC11) on Ihe LOGIC
UNIT,
P60 EXCS 30 Outputs selecte r slgnals for Ihe
110
expander IC (1C4) on the
LOGIC UNIT.
P61
TMCS 29 Outputs
selecter
signals for the
rea l time clock IC (IC12) on the
LOGIC UNIT,
PORT
PORT
PI N
DESCRIPTION
NUMBER NAME NUMBER
P62, ADCO,
28,27
Outputs channel selecter signals
P63 ADCI
ter ttte N O converter IC (IC15) on
the LOGIC UNIT,
P64
RD
26 Outputs astrObe signal ter
memory reading.
P65 WR 25
Outputs a strobe signal
ter
memory writlng.
P66, LCS1, 24,23 Outcuts chip selecter signals lor
P67 LCS2 ttte LCD drivers (ICS, IC9) on tne
LOGIC UNIT.
P70 FIL W 67 Becomes "HIGH'· when FM or
AMW mode is
selected.
P71 ADCS 6B Outputs chip seraeter signaIs tor
the Al O converter IC (IC 15) on
'he LOGIC UNIT,
P72 SSB 69
Becomes ·'HIGH" when SSB mode
is selected
.
P73 AM 71 Becomes "HIGH " when AMW or
AM mode is
setected.
P74 FM
72
Becomes "HIGH" when FM or
FMN mode is selected.
P7S
WFM 73 Becomes "HIGH" when WFM
mode is selected.
P76 UIL 74
Becomes ··LOW·· when US8 mode
is selectee t
This port becomes
"HIGH" in other modes.
PTO VBUSY 93 Inputs a "BUSY" slgnal for an
optlonal UT·36 VOICE
SYNTHESIZER UNIT.
This POrt
teeomes
"HIGH" while
synthesizinq .
PT 1--
-
94,
Not used .
PTI
'-6
3 -13