Port Allocations - Icom IC-F5121D Service Manual

5-5 PORT ALLOCATIONS

• CPU (FRONT UNIT: IC51)
BALL LINE
No. NAME
A1 KR1 [P1] input.
Power supply switching control.
A5 RXC
H= During receive or stand-by.
A7 TDAT Serial data to the DSP (IC2007).
Power supply switching control.
A15 PWON
H= The transceiver's power is ON.
B1 KR3 [P3] input.
B2 KR0 [P0] input.
Noise level detect.
B12 NOIS
H= Squelch close
External PTT input.
B13 EPTT
H= An external PTT is pushed.
B14 PGIO4 External I/O port.
AF mute SW control.
B15 AFON H= D u r i n g t h e s q u e l c h c i r c u i t i s
activated.
C3 KR2 [P2] input.
Power supply switching control.
C5 TXC
H= While transmitting.
C8 ESDA EEPROM (IC52) serial data.
C13 POSW [ ] input.
1st IF filters (FI4 and FI5) switching
C14 ADS control.
L= During digital mode.
Receive mode (narrow/mid/wide)
C15 NWC switching.
L= During narrow mode.
D6 DSCK DSP (IC2007) clock.
D8 ESCL EEPROM (IC52) clock.
DSP (IC2007) power control.
D13 DPDN
H= DSP is inactivated
DSP (IC2007) reset.
D14 DRES
L= Reset
Clock frequency shift.
D15 CSFT
H= Clock frequency is shifted.
E13 CRES CPU reset.
[Y] key input.
H1 SIDE1
L= Pushed
[Z] key input.
H2 SIDE2
L= Pushed
Microphone [PTT] input.
J1 IPTT
L= Pushed.
LCD dimmer control.
K3 LIGT1
H= Dimmer OFF.
MCG0,
L1, L2 MIC gain control.
MCG1
Backlight control.
L3 LIGT2
H= Backlight ON.
L14 SSO Common serial data.
L15 SCK Common clock.
Transmission mute.
M1 TMUT
L= TX inhibit.
M8 BEEP Beep audio. (Square waves)
D/A converter (IC1006) strobe.
M14 DAST
H= Load enable.
LCD driver (IC6) chip enable.
N2 LINH
H= Enable.
N12 BATV Power supply voltage sensing.
N14 RDAT DSP (IC2007) serial data.
Ignition SW detect.
N15 IGSW
L=Ignition detected.
DESCRIPTION
BALL LINE
I/O
No. NAME
P2 LCS
I
P4 PLSW
O
O P10 TEMP Temperature sensing voltage.
P11 RSSI RSSI sensing voltage.
O
P12 AFVI [VOLUME CONTROL] input.
I
R1 LSO
I
R4 PLST PLL strobe.
I
R10 LVIN
I
I/O
• D/A CONVERTER (IC1006)
PIN LINE
O
No. NAME
23 T1
I
(TXPO)
O
I/O
24 T2
I
7 REF
O
8 LVA
O
11 SQLC Outputs Squelch threshold setting.
12 TENC Outputs CTCSS deviation adjustment.
O
O
19 BAL
20 VRAF O u t p u t s M a x . d ev i a t i o n / A F vo l u m e
O
O
O
I
I
I
I
O
O
O
O
O
O
O
O
O
I
O
I
5 - 4
DESCRIPTION
LCD driver (IC6) chip
PLL lock up time control.
L= Fast lock up
LCD driver (IC6) serial data.
Lock voltage input.
DESCRIPTION
During receiving: O u t p u t s B P F t u n i n g
voltage.
During transmitting: TX power reference
voltage.
Outputs BPF tuning voltage
Outputs reference frequency adjust
voltage.
O u t p u t s a d d i t i o n a l l o c k v o l t a g e
adjustment.
Outputs DTCS balance.
adjustment.
I/O
O
O
I
I
I
O
O
I