Icom IC-F610 Service Manual page 12

4-6-3 CPU (MAIN UNIT; IC2)
Pin Port
number name
I/O port for data signal to the D/A con-
1 DSDA
verter (IC7).
Outputs strobe signals to the D/A con-
2 DAST
verter (IC6).
LINH, Output LCD control signals to the
8, 9
LCS LCD driver (FRONT unit; IC1).
Outputs clock signal to the LCD driver
10 LSCK
(FRONT unit; IC1).
Outputs data signal to the LCD driver
11 LSO
(FRONT unit; IC1).
Outputs strobe signal to the PLL IC
13 PLST
(IC4).
Outputs the R8 regulator circuit (Q26,
16 TXC Q30, D24) control signal.
Low: During receive.
Outputs the T8 regulator circuit (Q25,
17 TMUT Q29, D23) control signal.
Low: During transmit.
Outputs control signal for AF mute cir-
cuit (Q39, Q40, D31).
18 AFON
High: While AF amplifier (IC8) is
Outputs IF band width control signal.
19 NWC High: While IF bandwidth is nar-
Input port for data signal from the
20 DDSD
DTMF decoder IC (IC19, pin 9).
Outputs clock signal to the DTMF de-
21 DDAC
coder IC (IC19, pin 10).
Outputs data signal to the PLL IC
(IC4), D/A converter (IC6), compand-
22 SO
er IC (IC14) and optional unit (connect
to J1), etc.
Input port for clock signal from the op-
23 SI
tional unit via J1.
Outputs clock signal to the PLL IC
(IC4), D/A converter (IC6), D/A con-
24 SCK
verter (IC7), compander IC (IC14) and
optional unit (connect to J1), etc.
Outputs chip select signal for the op-
25 CCS
tional unit via J1.
KR0– Input por ts for the programmable
26–28
KR2 function keys (P0–P4,
Input port for the PTT switch from the
29 PTTO optional unit via J1.
Low: External PTT switch is ON.
Input port for the microphone hanger
detection signal.
30 HANG
Low: When microphone is on the
Outputs BUSY detection signal for the
31 BUSY
optional unit via J1.
Input port for the AF mute signal from
32 RMUT the optional unit via J1.
Low: While RX audio is muted.
Description
activated.
row.
, , , ).
hook.
Pin Port
number name
33 MMUT
OPT1–
34–36
OPT3
37 NOIS
38 POSW
39 DDST
40 IGSW
41 PWON
43 SENC
44 BEEP
45 SDEC
46 CDEC
47 ULCK
48 BATV
49 LVIN
50 RSSI
51 TEMP
52 AFVI
55 EPTT
59 RES
68 CLO
69 CLI
71 DUSE
74 XCTS
75 XRTS
4 - 6
Description
Input port for the microphone mute
signal from the optional unit via J1.
Low: The microphone audio is
muted.
I/O ports for the optional unit.
Input port for the noise signal from the
FM IF IC (IC1, pin 13).
Input port for the [ ] switch.
Low: The [ ] switch is pushed.
Input port for DTMF detection signal
from the DTMF decoder IC (IC19).
Input port for the remote power con-
trol signal from external connector
(J8).
Outputs control signal for the power
switch circuit (Q23, Q24) via D28.
High: While power ON.
Output single tone signal.
Outputs beep audio signal.
Input port for single tone signal from
the LPF (IC21, pin 8).
Input port for CTCSS/DTCS signal
from the LPF (IC5, pin 1).
Input port for the PLL unlock signal
from the PLL IC (IC4).
Low: The PLL circuit is unlocked.
Input port for the connected battery
for the low battery detection.
Input port for the PLL lock voltage.
Input port for the S-meter signal from
the FM IF IC (IC1, pin 12).
Input port for the transceiver's internal
temperature detecting signal.
Input port for the AF volume control
(FRONT unit; R12).
High: [AF VOLUME] is maximum
clockwise.
Input port for the PTT switch from the
external connector (J6).
Low: External PTT switch is ON.
Input port for the reset signal.
Outputs the cloning signal.
Input port for the cloning signal.
Outputs cut-off frequency control
signal to the low-pass filter (IC5) for
CTCSS/DTCS switch.
Input port for the connected modem
unit via external connector (J9).
Output port for the connected modem
unit via external connector (J9).