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3 - 14
3-7 PORT ALLOCATIONS
3-7-1 MAIN CPU2 PORT ALLOCATIONS
(LOGIC UNIT; IC604)
5–9
H8_A0–A4
11–17
H8_A5–A11 Output address bus signals.
19, 20 H8–A12, A13
21
UNLKA
Input port for the PLL unlock signal
from the RXPLL-A unit.
22
UNLKB
Input port for the PLL unlock signal
from the RXPLL-B unit.
23
ECK
Outputs clock signal to the EEPROM.
24
EDT
I/O port for the data signal from/to the
EEPROM.
26
DSCLA
Outputs clock signal to the EEPROM
on the DIGISEL-A unit.
27
DSDAA
I/O port for the data signal from/to the
EEPROM on the DIGISEL-A unit.
28
DSCLB
Outputs clock signal to the EEPROM
on the DIGISEL-B unit.
29
DSDAB
I/O port for the data signal from/to the
EEPROM on the DIGISEL-B unit.
30
RTKI
Input port for the RTTY keying signal.
31
TRVI
Input port for the transverter control
signal from ACC jack on the rear
panel.
33
SDAT
Outputs data signals to the DDS, PLL
and DSP ICs on the SCOPE unit.
34
SST2
Outputs strobe signal to the PLL IC on
the SCOPE unit.
35
EXRL1
Outputs external SEND relay (lead
type) control signal.
High : The relay switches ON.
36
EXRL2
Outputs external SEND relay (semi-
conductor type) control signal.
High : The relay switches ON.
42
PCK/CON0
Outputs clock signal to the RXPLL-
A/B ICs .
43
PDAT/CON1
Outputs data signal to the RXPLL-A/B
ICs.
46
PSLA
Outputs strobe select signal to the
PLL-A IC.
47
PSTA
Outputs strobe signal to the RXPLL-A
IC.
48
PSLB
Outputs strobe select signal to the
PLL-B IC.
49
PSTB
Outputs strobe signal to the RXPLL-B
IC.
51
MCK
Outputs clock signal to the ICs (other
than PLL, scope and DSP ICs).
52
DAT
Outputs data signal to the ICs (other
than PLL, scope and DSP ICs).
54
CTXD
Output port for the CI-V data.
55
CRXD/CBSY
Input port for the CI-V data and CI-V
bus busy signals.
56
DSPCK
Outputs clock signal to the DSP IC.
57
DSPR
Outputs data signal to the DSP IC.
58
ISTA
Outputs start signal to the internal
antenna tuner.
59
SST1
Outputs chip select signal to the DDS
IC on the SCOPE unit.
60
SPS0
Outputs profile select signal to the
DDS IC on the SCOPE unit.
61
SCK
Outputs clock signals to the DDS, PLL
and DSP ICs on the SCOPE unit.
63–69, 71, H8_D0–
I/O port for data bus signals.
73–80
H8_D15
81
MUTI
Input port for the external mute control
signal.
High : Mute ON.
82
TXS
Outputs control signal to the TX circuit
power supply.
Low : While transmitting.
83
NSQA
Input port for the noise pulse signal
from the RX-A circuit.
85
TRAS
Outputs control signal for transmisson
(other than PTT and the control signal
from ACC).
104
NSQB
Input port for the noise pulse signal
from the RX-B circuit.
105
RXSA
Outputs control signal to the RX-A cir-
cuit power supply.
Low : While the RX-A circuit is acti-
vated.
106
RXSB
Outputs control signal to the RX-B cir-
cuit power supply.
Low : While the RX-B circuit is acti-
vated.
107
SQSA
Outputs RX-A circuit squelch control
signal to the ACC jack.
High : RX LED lights ON.
108
SQSB
Outputs RX-B circuit squelch control
signal to the ACC jack.
High : RX LED lights ON.
109
SQLSM
Outputs AF mute control signal to the
MAIN RX circuit.
Low : Squelch is open.
110
SQLSS
Outputs AF mute control signal to the
SUB RX circuit.
Low : Squelch is open.
113
FORL
Input port for the “FOR” signal.
114
REFL
Input port for the “REF” signal.
115
ALCL
Input port for the ALC meter control
signal.
116
IDL
Input port for the ID meter control sig-
nal.
117
VDL
Input port for the VD meter control sig-
nal.
118
THML
Input port for the PA unit temperature
detect signal.
Pin
Port
Description
number
name
Pin
Port
Description
number
name
Summary of Contents for IC-7800
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 65 VOLTAGE DIAGRAM 67 Dec 2009 ...
Page 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 60 VOLTAGE DIAGRAM 64 Feb 2009 ...
Page 157: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Aug 2008 ...
Page 245: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Jul 2008 ...
Page 333: ...THE TRANSCEIVER i7800 SERVICE MANUAL S 14015HZ C1 2 Mar 2006 ...
Page 555: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14015HZ C1 2 C 2004 2006 Icom Inc ...