Port Allocations - Icom IC-F4210D Service Manual

4-5 PORT ALLOCATIONS

• CPU (IC51)
BALL LINE
No. NAME
Power supply switching control.
A5 RXC
H= During receive or stand-by.
RX AF mute switch control.
A6 RMUTE L= 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.
A7 DMOSI Serial data to the DSP (IC903).
Power supply switching control.
A15 PWON
H= The transceiver's power is ON.
Noise level detect.
B12 NOIS
H= Squelch close
AF power AMP control.
B15 AFON
H= AF power AMP (IC55) is activated.
C1, CBI2,
[ROTARY SELECTOR] input.
C2 CBI0
Power supply switching control.
C5 TXC
H= While transmitting.
C8 ESDA EEPROM (IC52) serial data.
C13 POSW Power switch. (R424)
1st IF filters (FI1 and FI2) switching
C14 ADS control.
L= During digital mode.
Receive mode (narrow/wide) switching.
C15 NWC
L= During narrow mode.
D2, CBI3,
[ROTARY SELECTOR] input.
D3 CBI1
D6 DSCK DSP (IC903) clock.
D8 ESCL EEPROM (IC52) clock.
DSP (IC903) power control.
D13 DPDN
H= DSP is inactivated
DSP (IC903) reset.
D14 DRES
L= Reset
Clock frequency shift.
D15 CSFT
H= Clock frequency is shifted.
E13 RES CPU reset.
[UPPER] key input.
H1 SIDE1
L= Pushed
[LOWER] key input.
H2 SIDE2
L= Pushed
Internal [PTT] input.
J1 IPTT
L= Pushed.
External PTT input.
J2 XPTT
H= An external PTT is pushed.
MCG0,
L1, L2 MIC gain control.
MCG1
Busy LED (Red) control.
L12 TLED
L= LED lights (While transmitting)
Busy LED (Green) control.
L13 RLED
L= LED lights. (While receiving a signal)
L14 SSO Common serial data.
L15 SCK Common clock.
Transmission mute.
M1 TMUT
L= TX inhibit.
Automatic TX control for VOX mode.
M2 ATX H= W h i l e M I C a u d i o f r o m t h e
connected headset is detected.
M8 BEEP Beep audio. (Square waves)
M11 MDET External connection detect.
AF CUSTOM IC (IC2) strobe.
M14 DAST
H= Load enable.
DESCRIPTION
BALL LINE
I/O
No. NAME
N11 VOXV Microphone input sensing voltage.
O
N12 BATV Battery voltage sensing.
N14 DMISO DSP (IC903) serial data.
O
P4 PLSW
O
P10 TEMP Temperature sensing voltage.
P11 RSSI RSSI sensing voltage.
O
P12 AFVI [VOLUME CONTROL] input.
P15 DSS
I
O R3 S5C
I
R4 PLST PLL strobe.
O
R9 MDWN
I/O
R10 LVIN
I
O
O
I
O
O
O
O
O
I
I
I
I
I
O
O
O
O
O
O
O
O
I
O
4 - 4
DESCRIPTION
PLL lock up time control.
L= Fast lock up
DSP (IC903) chip select.
Power supply line "S5C" switching
control.
H= Supplying current to the TX/RX
common circuits.
Man down detect.
L= While the transceiver is horizontal.
Lock voltage input.
I/O
I
I
O
O
I
I
I
O
O
O
I
I