Icom IC-2200H Service Manual page 14

4-5-3 CPU (LOGIC UNIT; IC1)
Pin Port
number name
Input port for the CTCSS/DTCS sig-
1 CTCIN
nals.
Input port for squelch volume detect-
2 SQLV
ing signal.
Input port for the [∫] and [√] switches
3 MICUD
from the external microphone.
Input port for the S-meter voltage
4 SD
detecting signal.
5 LVIN Input port for the PLL lock voltage.
Input port for the transceiver's internal
6 TEMP
temperature detecting signal.
Input port for the weather channel
7 DET0
alert detecting sinal.
Outputs LCD backlight color select
8 COLOR signal.
Low: Umber color is selected.
9 DIM0 Output LCD backlight brightness con-
10 DIM1 trols signals
Outputs the CPU clock shift control
14 CSHIFT
signal.
19 RESET Input port for the reset signal.
Input port for [POWER] switch.
25 PWRSW
Low: [POWER] switch is pushed.
Input port for the noise pulse signal for
26 NOIS
squelch and CPU.
28 DICK
Input ports for encoder signals.
29 DIUD
30 CLIN Input port for the cloning signal.
31 CLOUT Output port for the cloning signal.
Outputs serial clock signal to the D/A
34
SCK
convertor (MAIN unit; IC5, pin 7).
35 BUSY Outputs "BUSY" signal to the UT-115.
Outputs [POWER] switch control sig-
40 PWRON nal.
High: [POWER] is ON.
Outputs band shift signal.
42 BSHIFT Low : While receiving Air band
Outputs strobe signal to the PLL IC
43 PLLSTB
(MAIN unit; IC1, pin 4).
Outputs clock signal to the PLL IC
44 PLLCK
(MAIN unit; IC1, pin 2).
• Outputs
EXSTB expander IC (MAIN unit; IC2, pin 1).
45
OPV3 • Input port for the optional unit detect-
ing signal.
46 UNLK Input port for the PLL unlock signal.
Input port for the HM-133V remote
47 REMO
microphone signals.
Output transmitting/receiving AF filter
49 MICS select signal to the analog swtich (IC6,
51 AFON pin 6 ["AFON" is applied to the
pin 12]).
Description
(118–136 MHz).
strobe signal to the
Pin Port
number name
53–55 IS0–IS2
56, 57 KS1, KS2
58–61 KR3–KR0
62 PTT
64 DI_SEC
65 TX_DIGI
66 SO
67 OPSCK
OPV1
68
DASTB
69 OPV2
73 EXTMIC
74 DUSE
75 ESCK
76 ESDA
77 OP_PS
80 THROUGH
81 ALC
84 OPT3
85 OPT2
86 OPT1
90, SEG1–
92–127 SEG36
COM4–
128–131
COM1
VL3–
134–136
VL1
144 IDET
4 - 6
Description
Output initial matrix strobe signals.
Output key scan signals
Input ports for the keyboard matrix
signals.
Input port for the [PTT] switch signal.
High: While transmitting.
Outputs digital/analog select signal
while the UT-115 is installed.
High : Digital is selected.
Outputs filter characteristic control sig-
nal while the UT-115 is installed.
Low : While transmitting digital sig-
nal.
• Outputs serial data to D/A convertor
(MAIN unit; IC5, pin 8).
• Outputs DTMF clock signal to the
expander IC (MAIN unit; IC2, pin 2).
Outputs clock signal to the optional
unit.
• Input port for the optional unit detect-
ing signal.
• Outputs strobe signal to the D/A con-
verter (MAIN unit; IC5, pin 6).
Input port for the optional unit detect-
ing signal.
Input port for detecting signal whether
the multifunction microphone is con-
nected or not.
Low: The multifuntion microphone is
connected.
Outputs low-pass filter cut-off frequen-
cy control signal when using DTCS.
Outputs clock signal to the EEPROM
(IC5, pin 6).
I/O port for data signals from/to the
EEPROM (IC5, pin 5).
Outputs the optional unit power supply
controll signal.
High : Power is ON.
Outputs the ALC circuit control signal.
High : The ALC circuit is OFF.
Outputs the ALC circuit control signal.
High : The ALC circuit is ON.
I/O ports for the optional unit control
signals.
Output LCD segment signals.
Output LCD common signals.
Output LCD device signals.
Input port for the current drain detect-
ing signal while transmitting.