Main Cpu; Dd Unit; - Icom IC-7000 Service Manual

3-6-2 MAIN CPU (LOGIC UNIT; IC1302)
Pin Port
number name
Outputs data signal for the clock gen-
26 CYDT
erator (IC1201) for display control.
Outputs clock signal for the clock gen-
27 CYCK
erator (IC1201) for display control.
I/O port for the data signal from/to the
29 RTCDT clock IC (IC1304) for clock indication
and timer function.
Outputs clock signal for the clock IC
30 RTCCK (IC1304) for clock indication and timer
function.
Outputs strobe signal for the D/A con-
42 LOST
verter (DDS unit; IC901).
Outputs strobe signal for the D/A
43 MST converter ICs (MAIN unit; IC2151–
IC2154).
Input port for the data signal from the
46 MMDK microphone that is connected to the
rear [MIC] connector.
Outputs the reset signal for the DSP
47 DRES
ICs (IC301, IC2201).
Outputs the reset signal for the LCD
48 PRES# controller (IC1226) and DDS IC (DDS
unit; IC301).
Outputs the squelch control signal for
49 SQSS the ACC connector and connected
microphone.
Outputs clock signal for the D/A
51 MCK converter ICs (MAIN unit; IC2151–
IC2154).
Outputs serial data signal for the D/A
52 MDT converter ICs (MAIN unit; IC2151–
IC2154).
Outputs the signal for H SEND or V
57 SDSS SEND selection.
High : While V SEND is selected.
• Outputs data signal for AT-180.
58 TDAT
• Outputs start signal for AH-3/AH-4.
Outputs data signal for the DSP IC
81 DTXD
(IC301).
Input port for data signal from the
82 DRXD
DSP IC (IC301).
Outputs the TX band signal.
83 2T8V High : While transmitting the 144 MHz
Outputs the TX band signal.
104 4T8V High: While transmitting the 430 MHz
Outputs R8 regulator (Q1701, Q1702)
105 RXS control signal.
Low : While receiving.
Outputs T8 regulator (Q1703, Q1704)
106 TXS control signal.
Low :While transmitting.
Outputs the power control signal .
107 POWS
High :When IC-7000 is power ON.
Description
band.
band.
Pin
Port name
number
109 ECK
110 EDT
113 FORL
114 REFL
115 ALCL
116 SNDL
117 DPTL
118 THML
119 MUDL
121, DASK,
122 DOTK
124 MMSL
127 TKEY
128 TRD
133 LTXD
134 LRXD
135 PWRK
137 3DST
138 PCK
140 1DST
142 PDT
3 - 10
Description
Outputs clock signal to the EE-
PROM (IC1301).
I/O port for the EEPROM (IC1301).
Input port for the forward voltage.
Input port for the refl ection voltage .
Input port for ALC level.
Input port for PTT control signal
from the FRONT unit or ACC con-
nector.
Input port for PTT control signal
from the DATA connector.
Input port for the temperature de-
tection signal.
Input port for [UP] and [DN] switch-
es from the optional microphone
(HM-103, SM-20) that is connected
to the rear [MIC] connector.
Input ports for [KEY] jack.
Input port for the HM-151 connec-
tion detection.
Input port for tuner ON.
Input port for the detected signal for
the tuner unit connection.
Outputs data signal to the sub CPU
(DISPLAY unit; IC2003).
Inputs data signal from the sub
CPU (DISPLAY unit; IC2003).
Input port for [PWR] key.
Low : While [PWR] key is pushed.
Outputs strobe signal to the DDS
IC (DDS unit; IC51) for the 3rd LO
signal.
Outputs clock signal for the DDS
ICs (DDS unit; IC51, IC301) and
D/A converter (DDS unit; IC901).
Output strobe signal to the DDS IC
(DDS unit; IC301) for the 1st LO
signal.
Outputs serial data signal for the
DDS ICs (DDS unit; IC51, IC301)
and D/A conver ter (DDS unit;
IC901).