Icom IC-7600 Service Manual page 19

• FRONT CPU (LOGIC UNIT: IC101)
Pin Line
No. Name
TFT contrast control. (D/A)
1 CNTV
(1–2.3 V)
POWER LED control.
2 PWRD
(0 V=Light OFF, 3.3 V=Light ON.)
3 LDAT Expander (BU2099) data.
4 LST Expander (BU2099) strobe.
5 RTCCK Expander (BU2099) clock.
8 RTCCE Clock IC (RX-4581) chip enable.
9 MOND [MONITOR] LED control signal.
16 RTCIRQ Clock IC (RX-4581) interlude control.
19 RSB RIT dial (24x4 pulses) phase-B input.
20 RSA RIT dial (24x4 pulses) phase-A input.
21 MSB Main dial (250x4 pulses) phase-B input.
22 MSA Main dial (250x4 pulses) phase-A input.
Timer LED control.
23 TMD
H=Light ON.
24 LEDV LED brightness control. (PWM, 600 Hz)
LCD backlight ON/OFF.
25 BKLS
H=Backlight ON.
CFL backlight brightness control. (PWM, 600
26 CFLV
Hz)
Headphone connection detect.
28 PHNI
H=Connection detected.
29 DTXD Falsh read data.
30 DRXD Flash write data.
Flash write clock.
31 SLOS
H=While writing.
32 DBP1 Flash write "BUSY."
Data output (UART) for the communication
33 LTXD
with main CPU.
Data input (UART) for the communication with
34 LRXD
main CPU.
35 DOTK Ele-key input. (Dot)
36 DSHK Ele-key input. (Dash)
Squelch signal to the [MICROPHONE JACK].
37 SQSS
H=Squelch open.
38 RTCDT Clock IC (RX-4581) data.
40 TRAK [TRANSMIT] input. (Pull-up)
41 F1K [F-1] input. (Pull-up)
42 F2K [F-2] input. (Pull-up)
43 F3K [F-3] input. (Pull-up)
44 LOE Expander (BU2099) output enable.
45 F4K [F-4] input. (Pull-up)
46 F5K [F-5] input. (Pull-up)
47 F6K [F-6] input. (Pull-up)
49 SSBK [SSB] input. (Pull-up)
50 CWK [CW] input. (Pull-up)
51 RTYK [RTTY/PSK] input. (Pull-up)
52 AMK [AM/FM] input. (Pull-up)
53 FILK [FILTER] input. (Pull-up)
55 EXTK [EXIT/SET] input. (Pull-up)
56 PLYK [PLAY key input. (Pull-up)
57 RECK [REC] input. (Pull-up)
58 XFCK [XFC] input. (Pull-up)
65 MPRK [MP-R] input. (Pull-up)
66 MWK [MW] input. (Pull-up)
67 UPK [ ] input. (Pull-up)
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Pin Line
No. Name
68 DWK [ ] input. (Pull-up)
69 MPWK [MP-W] input. (Pull-up)
70 VMK [V/M] input. (Pull-up)
71 ATK [AUTO TUNE] input. (Pull-up)
72 TSK [TS] input. (Pull-up)
73 PWRK [POWER] input. (Pull-up)
Analog circuit control signal.
76 FPWRS
H=Transceiver power ON.
83, PB2B,
Input ports for [PBT2] (outer control).
I 84 PB2A
I 85, PB1B,
Input ports for [PBT1] (inner control).
86 PB1A
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Logic circuits reset signal.
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87 LG_RES
H=Reset.
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LG_ Logic circuits power control signal.
88
PWR H=Transceiver power ON.
89 MUDL [MIC GAIN] input. (A/D)
Voltage from the analog SW (CD4501). (A/D)
90 AS4
(0–3.3 V)
Voltage from the analog SW (CD4501). (A/D)
91 AS3
(0–3.3 V)
Voltage from the analog SW (CD4501). (A/D)
93 AS1
(0–3.3 V)
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98 ASL2 Analog SW (CD4501) control signal.
99 ASL1 Analog SW (CD4501) control signal.
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100 ASL0 Analog SW (CD4501) control signal.
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