Voltage Block Diagrams; Cpu Port Allocation - Icom IC-R6 Service Manual

4-4 VOLTAGE BLOCK DIAGRAM
Voltage from the power supply is routed to throughout the
transceiver via regulators and switches.
IC455,Q512,Q513
D511
D508
HV
+5V
LIMIT
REG
J500
CP3 D509
CP4
Q510,D507
CHRG
Q509
CHRG CHGS
BATTERY
C TRL
PACK
Q501,D500,D503
CHRG
Q502
CHRG CHGC
C TRL
IC103
+2S
REG
+3.3CPU
Q500,D501
IC102
DC VCC DC-DC
SW CONV IC3
RESE T RESET
PCON
Q103
LOGI C
C TRL
IC104
+3V
REG
LOGIC3.3V
+3SC
Q102
+3S
C TRL
IF CON
Q104
IFV
C TRL

4-5 CPU PORT ALLOCATION

Pin Line
No. Name
1 IOCK
2 IOSTB
+2S
3 IOEN
4 IODATA Expand IC serial data.
5 ESIO
6 ECK
7 CHGC
LOGIC
3.3V
8 TCON
+3V
9 AMUTE
15 ATT
16 SHIFT
+3S
17 CLS
IFV
18 DBL1
19 AF_FIL
38 AFSEL
41 AFON
42 LIGHT
43 VR_CLK Electric volume IC serial clock.
44 VR_DATA Electric volume IC serial data.
45 MODE
53 DUD
54 DCK
98 FSET
99 TRAC
103 VSC
104 K2
105 K1
106 RSSI
107 VIN
108 CTONE
109 RTONE
110 TEMP
111 SQL
4 - 4
Description
Expand IC serial clock.
Expand IC strobe.
Expand IC chip enable.
EEPROM serial data.
EEPROM serial clock.
Charging circuit control.
H=While regular charging.
L=While trickle charging.
Tone fi lter contol.
L= While the tone squelch function is
in use.
AF mute switch control.
H=AF mute.
Attenuator control.
L=The attenuator is ON.
1st VCO oscillation frequency range
shift.
CPU clock frequency shift.
H=Clock frequency is shifted.
Doubler circuit (DBL1; Q31, D43,
D50) control.
L= While receiving 283–494.2 MHz
and 833–1066.7 MHz.
AF filter (LOGIC UNIT: R350 and
C404) control.
H= The AF fi lter setting is ON.
AF filter (LOGIC UNIT: Q301/Q302)
select.
H= While receiving in the FM mode.
The AF fi lter (Q302) is selected.
L= W h i l e r e c e i v i n g i n t h e W F M /
AM mode.The AF filter (Q301) is
selected.
AF power AMP control.
L=AF power AMP is activated.
Backlight LED control.
H= The backlight (DS2 and DS3)
lights.
[MODE] input.
L= Pushed.
[DIAL] input. (Data)
[DIAL] input. (Clock)
Reference frequency adjustment
voltage.
Bar antenna tuning voltage.
Demodulated AF signal input. (For
the ＶＳＣ function)
[UP] and [DOWN] inputs.
[BAND], [V/M] and [MODE] inputs.
RSSI voltage from the IF demodulator
IC (RF UNIT: IC12, pin16).
Remaining battery voltage.
To n e s i g n a l s ( W X / M S K / T R A I N )
decoding input.
To n e s i g n a l s ( C T C S S / D T C S )
decoding input.
Temperature sensing voltage.
[SQL] input.
L= Pushed.
I/O
O
O
O
O
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
O
O
I
I
I
I
I
I
I
I
I