Icom IC-706 - Page 14

MAIN CPU PORT ALLOCATIONS (Continued)
Pin
Port name
Description
number
44
IBST Outputs a strobe signal for the I/O
(P45) expander ICs
(IC31 , IC32).
45
IMST Outputs a strobe signal for the I/O
(P46)
expander
IC (IC30).
46
lAST Outputs a strobe signal for the D/A
(P47)
converter IC (IC35).
48
PBST Outputs a strobe signal for the
(P27)
BFO DDS IC (IC12).
49-51
CON2- Output mode control signals for the
CONO
1st LO DDS IC (IC10).
(P26-P24)
52
POST Outputs a strobe signal for the 1st
(P23)
LO DDS IC (IC10).
53
PCE Outputs a strobe signal for the 1st
(P22)
LO PLL IC (IC13).
54
PDT Outputs serial data for the DDS
(P21)
ICs and PLL IC.
55
PCK Outputs a clock signal for the DDS
(P20) ICs and PLL IC.
65
MCK
Inputs a clock signal for
(P30)
microphone up/down switches.
66
MUD Input port for microphone up/down
(P31) switches.
74 SNDS Input port for transmiVreceive
(P80) switching signals for the [ACC]
socket. This port becomes "Low"
while transmitting.
75
KDS Outputs a CW keying signal or
(P81) RTTY TX signal.
78
TXDl Output port for CI-V bus line.
(P84)
79
RXDl Input port for CI-V bus line.
(P85)
3-4-3 SUB CPU PORT ALLOCATIONS
(DISPLAY UNIT IC1)
Pin
Port name Description
number
1
SFTV Input port for the [SHIFT] control.
(PC3)
18 PTTS Outputs a PTT signal. Becomes
(P27)
"Low" while transmitting.
19
AMBS Outputs a control signal for
(P30)
backlighting.
20 DIMS Outputs a dimmer control signal for
(P31) backlighting.
80
PHNL
Input port for the connection signal
(P13)
of the [PHONES] jack.
3-9
SUB CPU PORT ALLOCATIONS (Continued)
Pin
Port name
Description
number
81 RITK
Input port for the [RIT] switch.
(P14)
90-95
KI0-KI5
Input ports for the [P.AMP/A
TT],
(PB0-
[TUNER/CALL], [MENU],
PB5)
[F-l]-[F-3], [DISP], [LOCK],
[MODE], [TS], [UP] and
[ON]
switches on the front panel.
96
PTTV Input port for the [PTT] switch on
(PB6)
the microphone.
97 MUDV Input port for the up/down switches
(PB7)
on the microphone.
98
AFGV Input port for the [AF] control.
(PCO)
99
SOLV
Input port for the [RF/SOL] control.
(PC1)
100 RITV
Input port for the [RIT] control.
(PC2)
3-4-4 I/O EXPANDER PORT ALLOCATIONS
(1) Output ports (MAIN unit IC30)
Pin
Port name
Description
number
4 MODS Outputs selection signal for the
(01) modulation signal.
5 AMS Outputs selection signal for
AM
(02)
mode.
6
FMS Outputs selection signal for
FM
(03)
and FM narrow modes.
7
WFMS
Outputs selection signal for
(03)
WFM mode.
11, 12 AFS1,AFS2
Output selection signals for the
(08,07) AF signal.
13 UNFM Outputs selection signal for
(06) SSB/CW/RTTY/AM modes.
14 MINH
Outputs an inhibit signal for the
(05)
microphone mute circuit (IC23).
(2)
Output ports (MAIN unit IC31)
Pin
Port name Description
number
6,7, B7, B7W,
Output selection signals for the
13,14 B8W, B8 bandpass filters.
(03,04,
06,05)
11,12 2N80,lS15
Output selection signals for the
(08,07) IF filters.