Port Allocations - Icom ID-31A Service Manual

4-5 PORT ALLOCATIONS

• CPU (LOGIC UNIT: IC5)
BALL LINE
No. NAME
GPS module (CHASSIS: EP1) controller
A4 G_RES (IC1) reset.
L: Reset.
A5 REMOTE HM-75A key input detect.
A6 VIN External power supply voltage.
A7 RTONE DV signal/recorded audio.
TX AMP (MAIN UNIT: Q45) temperature
A8 TTEMP
sensing voltage.
A10 DICK1 [DIAL] (outer dial) (S12) phase-A
PLL unlock detect.
A11 UNLK
L: Unlock is detected.
D/A converter (MAIN UNIT: IC11) strobe.
A12 DALD
("H" and "L" are reversed.)
A13, KS0,
Key matrix ports.
A14 KS2
B1 DTMF DTMF/European tone/Beep signal.
B5 LV Lock voltage.
B7 TXI-V TX current fl ow sensing voltage.
B8 TEMP Temperature sensing voltage.
B10 DIUD1 [DIAL] (outer dial) (S12) phase-B
CPU clock frequency control.
B11 CLSFT
H: The clock frequency is shifted.
B13 KS1 Key matrix port.
B15 KR0 Key input detect.
C2 CTCSS CTCSS/DTCS tone signal.
C5 VOX VOX sensing voltage.
C7 CTCIN CTCSS tone signal input.
C10 DIUD2 [DIAL] (inner dial) (S12) phase-B.
CTCSS/DTCS fi lter (R65, R68, C78, C80)
C11 DTCS switching.
H: DTCS is in use.
C13 KS3 Key matrix port.
C14 KR1 Key input detect.
External power supply connection detect.
C15 DCIN
L: External DC input.
D/A converter serial data.
D1 DADATA
("H" and "L" are reversed.)
D2 G_RXD GPS data input.
DSP clock frequency control.
D4 DCSFT
L: Clock frequency is shifted.
Battery type detect.
D5 BTSENC ( Detecting intermediate voltage of the bat-
tery pack.)
D6 BTVIN Battery pack voltage.
D7 RSSI S-meter voltage.
D10 DICK2 [DIAL] (inner dial) (S12) phase-A.
D/A converter (MAIN UNIT: IC11) clock.
D11 DACK
("H" and "L" are reversed.)
D12 KR2 Key input detect.
Battery attachment detect.
D13 BTDET
L: Battery attached.
[POWER] key.
D14 PWRSW
L: Pushed.
E4 G_TXD GPS data output.
Charging ON/OFF control.
F12 CHGC
H: While charging.
TX LED (DS7) driver (Q9) control.
F13 TXLED
H: While transmitting.
BUSY LED (DS7) driver (Q8) control.
F15 BLED
H: While the squelch is open.
CPU reset.
G1 RESET
L: Reset.
DESCRIPTION
BALL LINE
I/O
No. NAME
G3 LIGHT
O
G4 DIM
I
I
G12 INTMIC
I
G14 CHGH
I
I
G15 PCON
I
VCO_
H12
SEL
O
RTC_
J4
IRQ
O
J12 MMUTE
O
I
J13 TXMUTE
I
I
J15 PFMC
I
K1 NOIS
DSP_
O
K4
REQ
O
VCO_
K12
I
MUTE
O
I
K13 WN
I
I
O
K14 MIC1
O
I
K15 MIC2
I
O
L12 SQL
I
L14 PS3C
O
L15 R3C
I
M2 CLOUT
I
DSP_
I
M5
STB
I
M6 DSPC
O
M7 PPS
I
M8 LCDRS
I
M9 LCDCS
I
DSP_
M10
REMP
O
M12 TX232
O
M14 ESIO
O
M15 T3C
O
N1 CLIN
SD_
N2
I
SENC
N3 SD_TXD MicroSD card data output.
4 - 4
DESCRIPTION
LCD and key backlight (DS1, DS3) driver
(Q23) control.
LCD backlight (DS1, DS3) dimmer control.
H: Blight.
Internal MIC (MAIN UNIT: MC1) control.
H: Internal microphone is in use.
Charging current control.
H: While charging.
Power lines "PS3" and "5VS" SW (MAIN
UNIT: IC4) control.
H: While the transceiver's power is ON.
VCO power supply control.
L: While the transceiver's power is ON.
Real time clock "IRQ" input.
MIC mute SW (IC16) control.
L: Mute.
TX mute SW (MAIN UNIT: Q43) control.
H: mute.
GPS/DSP operating mode control.
Noise level sensing voltage.
DSP "REQ" input.
Modulation mute SW (MAIN UNIT: Q21)
control.
H: Mute.
2nd IF fi lter (MAIN UNIT: FI1 and FI2)
switching control.
L: FI1 is selected. (While in the FM-N or
DV mode.)
MIC gain control.
MIC gain
MIC1 MIC2
level
L L 4
H L 3
L H 2
H H 1
[SQL] (MAIN UNIT: S1) input.
L: Pushed.
Power line "PS3C" SW (Q13) control.
L: While in the power save mode.
Power line "R3C" SW (MAIN UNIT: Q24)
control.
L: While receiving.
Cloning data.
DSP (IC18) strobe.
Power line "CVDD_1.35V" SW (IC10) control.
H: While the DSP's power is ON.
PLL operating mode control.
H: While in the power save mode.
LCD (DS10) reset.
LCD (DS10) chip select.
DSP "REC EMP" input.
RS-232C serial data output.
EEPROM (IC7) serial data.
Power line "T3C" SW (MAIN UNIT: Q17,
Q19) control.
H: While transmitting.
Cloning data.
SD Card insertion detect.
L: A microSD card is inserted.
I/O
O
O
O
O
O
O
I
O
O
O
I
I
O
O
O
I
O
O
O
O
O
O
O
O
I
O
I/O
O
I
I
O