Icom IC-PCR1500, Service Manual

Page: 18 / 68

4 - 7
Pin
No. PORT
NAME
DESCRIPTION
4 BMST2
Outputs strobe signal to the expander (MAIN-B
UNIT; IC18, pin1).
5 BCK
Outputs clock signal to the expander (MAIN-B
UNIT; IC17, pin 3).
8 BMST1
Outputs strobe signal to the expander (MAIN-B
UNIT; IC3, pin1).
9 CSHIFT
Outputs clock frequency shift signal to the
clock shift circuit (D6).
16 NOIS
Input port for “NOIS” signal from the IF IC
(MAIN-A UNIT; IC24, pin 13).
17 BNOIS
Input port for “BNOISE” signal from the IF IC
(MAIN-B UNIT; IC24, pin 13).
18 PWRSW
Input port for power witch (CHASSIS; S1).
“Low”=While the power switch is turned.
19 BMST3*
Outputs strobe signal to the expander (MAIN-B
UNIT; IC17, pin 1).
20 CCS
Outputs optional unit select signal to the
attached optional unit via the pin 20 of J2018.
“High”=While the optional unit is attached.
21 BP1STB*
Outputs PLL strobe signla to the 1st PLL IC
(MAIN-B UNIT; IC10, pin 11).
22 BP2STB*
Outputs PLL strobe signla to the 2nd PLL IC
(MAIN-B UNIT; IC13, pin 13).
23 BDSTB*
Outputs strobe signal to the D/A converter
(MAIN-B; IC8, pin 6).
27 PDIN Input port for USB data.
28 PDOUT Outputs USB data.
31 SCL Outputs clock signal to the EEPROM (IC14, pin 5).
33 OPSO
Output serial data to the attached optional unit
via the pin 18 of J2018.
34 OPSI
Input port for serial data from the attached
optional unit via the pin17 of J2018.
35 OPSCK
Outputs clock signal to the Attached optional
unit via the pin 16 of J2018.
36 AIRQ
Input port for data request signal from the
attached UT-122 via the pin 19 of the J2017.
37 ASTB
Outputs strobe signal to the attached UT-122
via the pin 20 of the J2017.
38 ASI
Input port for serial data from the attached
UT-122 via the pin 17 of the J2017.
39 ASO
Outputs serial data to the attached UT-122 via
the pin 18 of the J2017.
40 ACK
Outputs clock signal to the attached UT-122 via
the pin 16 of the J2017.
41 DSPS
Outputs DSP select signal to the attached DSP
unit via pin 7 of J15.
42 IMST
Outputs DSP strobe signal to the attached
DSP unit via pin 3 of J15.
43 BUSY
Outputs busy signal to the attached optional
unit via pin 7 of J7.
44 SDL I/O port for EEPROM (IC14, pin 6).
45 OPAFSEL
Outputs control signal to the AF switch (IC23,
pin 5).
“High”=While the optional unit is activated.
46 OPAFINH
Outputs control signal to the AF switch (IC23,
pin 2).
“High”=The AF line for the optional unit is dis-
connected.
47 BOPAFSEL*
Outputs control signal to the AF switch
(IC2031, pin 5).
“High”=While the optional unit is activated.
48 BOPAFINH*
Outputs control signal to the AF switch
(IC2031, pin 2).
“High”=The AF line for the optional unit is dis-
connected.
Pin
No. PORT
NAME
DESCRIPTION
49 RXMUTE
Input port for mute signal from the attached
optional unit via the pin 24 of J2018.
“High”=While the audio output is muted.
53 APAFSEL
Outputs control signal to the AF switch (IC4,
pin 5).
“High”=While the UT-122 is in use.
54 APAFINH
Outputs control signal to the AF switch (IC4, pin
2).
“High”=While the attached UT-122 is inactivated.
57 VDAT
Outputs serial data to the electric volume
(IC17, pin 16).
58 VCK
Outputs clock signal to the electric volume
(IC17, pin 15).
59 VSTB
Outputs strobe signal to the electric volume
(IC17, pin 14).
61 LSTB
Outputs strobe signal to the expander (IC34,
pin 1).
64 PWR
Outputs control signal to the power controller
(Q4, Q6).
“High”=While the receivers power is ON.
65 DTMSTD
Input port for detecting signal from the DTMF
decoder (IC19, pin 14).
“High”=When the DTMF signal is detected.
66 DTMSD
Input port for DTMF signal from the DTMF
decoder (IC19, pin 9).
67 DTMCK
Outputs clock signal from the DTMF decoder
(IC19, pin 11).
70 PDSTB
Outputs strobe signal to the DDS IC (MAIN-A
UNIT; IC22, pin 41).
73 VBUS
Input port for USB connection detecting signal
from the VBUS line.
“High”=While a PC is connected through [USB] con-
nector on the receiver's main unit.
75 DSTB
Outputs strobe signal to the D/A converter
(MAIN-A; IC8, pin 6).
76 P2STB
Outputs strobe signal to the 2nd PLL IC
(MAIN-A UNIT; IC13, pin 13).
77 P1STB
Outputs strobe signal to the 1st PLL IC
(MAIN-A UNIT; IC12, pin 11).
78 DPSTB
Outputs strobe signal to the down converter
PLL IC (MAIN-A UNIT; IC4, pin 11).
79 MST0
Outputs strobe signal to the expander (MAIN-A;
IC3, pin 1).
80 MST1
Outputs strobe signal to the expander (MAIN-A;
IC18, pin 1).
81 MST2
Outputs strobe signal to the expander (MAIN-A;
IC3, pin 1).
82 BCMAD*
Input port for RSSI signal from the RSSI signal
selector (MAIN-A; IC30, pin 1).
83 BVSCAF*
Input port for VSC signal from the tone filter
(IC2021, pin 7).
85 BRTONE*
Input port for CTCSS signals from the tone
fi lter (MAIN-B UNIT; IC21, pin 1).
86 BSMAD*
Inputpor t for RSSI signal from the IF IC
(MAIN-A/B UNITS; IC16, pin 13).
88 TEMP Input port for internal temperature detection.
89 SCAD
Input port for RSSI signal from the IF IC (MAIN-A/
B UNITS; IC20, pin 5) for band scope function.
90 CMAD
Input por t for RSSI signal from the IF IC
(MAIN-A UNIT; IC30, pin 1) for AFC function.
91 VSCAF
Input port for VSC signal from the tone filter
(IC21, pin 1).
93 RTONE
Input port for CTCSS signals from the tone
fi lter (MAIN-A UNIT; IC21, pin 7).
98 USBPOW
Outputs voltage line control signal to the 3.3V
regulator (IC1, Q31, Q32, Q33).
“High”=During in the USB audio mode.
4-5 CPU PORT ALLOCATION
4-5-1 CPU (LOGIC UNIT; IC18)
*PCR2500 only