Icom ID-5100A, Service Manual

Page: 18 / 59

4-8
Ball
No.
Line Name Description I/O
R4 CLOUT
CI-V/CLONE UART data.
(300–38400 bps)
O
R5 DSP_RESET
DSP reset control.
L=Reset.
O
R6 RTC_SCL
Serial clock to the real time clock
IC.
O
R7 PCON
Main power supply line control.
H= Power ON.
O
R9 SD_PTC
SD card write protect control.
H=Write protect.
O
R10 SCRES Sub CPU reset. O
R11 SCTRG "TRG" signal to the sub CPU. O
R12 SCTXS "TXS" signal to the sub CPU. O
R13 CK
Common serial clock to the D/A
converter and expander.
O
R14 MICSEL
External microphone connection
detect.
I
59 L_AFMUTE
AF output mute. (A band)
H=Mute.
O
56 MICMUTE
MIC mute switch control.
H= Mute.
O
27 DCSFT
DSP clock shift control.
L=+600 Hz shifted.
O
17 R_PLLSTB PLL serial strobe. (Band B) O
63 R_AFMUTE
RX AF mute control. (Band B)
L= Mute.
O
55 PLAY
Modulation signal line switching
control.
H= Recorded audio is transmitted.
O
22 VTX_C
VHF band transmit circuit power
control.
H= While transmitting.
O
23 UTX_C
UHF band transmit circuit power
control.
H= While transmitting.
O
20 L_PLLSTB PLL serial strobe. (Band A) O
*: Clock frequency shifting range.
Line name CLSFT1 CLSFT2 Shifting range
Line state
H H –1.2 kHz
H L ±0 kHz
L L +1.2 kHz
Ball
No.
Line Name Description I/O
1 L_REFC
Reference frequency control.
(Band A)
O
2 R_REFC
Reference frequency control.
(Band B)
O
7 SCRES Sub CPU reset. I
18 PLLCK PLL serial clock. O
19 PLLDATA PLL serial data. O
31 AF_SW
AF output control.
H= AF signal is output from the ex-
ternal speaker.
O
24 L_RMUTE
AF mute control. (Band A)
L=Mute.
O
25 R_RMUTE
AF mute control. (Band B)
L=Mute.
O
26 DTCS_SEL
Tone signal (CTCSS/DTCS) fi lter
switching control.
H=While sending DTCS signal.
O
34 MAIN_DASEL
Operating mode (FM/DV) switch-
ing control.
H= While operating in the DV
mode.
O
36 MIC1 Microphone gain control. O
48 SCSCK Sub CPU clock. I
49 SCTXD Sub CPU data to the main CPU. I
50 SCRXD Main CPU data. O
51 MIC2 Microphone gain control. O
52 SCTRG "TRG" signal from the main CPU. I
53 SCTXS "TXS" signal from the main CPU. I
57 VRX_RPT
Demodulated signal polarity
switching control.
H= While operating on the VHF
band.
O
58 URX_RPT
Demodulated signal polarity
switching control.
H= While operating on the UHF
band.
O
60 CLSFT3
Sub CPU clock frequency shift
control.
H=Shifted.
O
61 CLSFT2*
Main CPU clock frequency shift
control.
O
62 CLSFT1*
64 SCACK
Sub CPU "ACK" signal to the main
CPU.
O
• SUB CPU (MAIN UNIT: IC303)
• MAIN CPU (MAIN UNIT: IC300) (continued)