Icom ID-800H, Руководство по обслуживанию, Страница: 20 / 59

4-6 PORT ALLOCATIONS
4-6-1 MAIN CPU (MAIN UNIT; IC505)
Pin
number
Port name Description
16 TX-MUTE
Outputs the transmit mute signal.
High: While transmit is muted.
17 MIC-PTT
Input port for the microphone PTT
signal.
High:
W h i l e P T T s w i t c h i s
pushed.
20 UTXC
Outputs the UT8 regulator control
signal.
High:
While transmitting on UHF
band.
21 VTXC
Outputs the VT8 regulator control
signal.
High:
While transmitting on VHF
band.
22
DTCS_SEL
Outputs the DTCS fi lter select signal.
High:
W h i l e t r a n s m i t t i n g t h e
DTCS signal.
24 ES_DAT
I/O port for data signals from/to the
EEPROM (IC501, pin 5).
25 ES_CK
Outputs clock signal to the EEPROM
(IC501, pin 6).
26 P_PTT
Input port for the PTT control signal
from the connected TNC.
Low:
While transmitting for the
packet operation.
27
P_MOD_
MUTE
Outputs the packet modulation mute
control signal.
Low: While packet modulation is
muted.
28 98_DATA
Input port for data signal from the
HM-133.
31 MIC_SEL
Input port for the connected micro-
phone detect signal.
Low:
While the HM-133 is con-
nected.
39 SQL
Input port for the squelch level signal
from the FM IF IC (IC8, pin 14).
40 RSSI
Input port for the S-meter signal from
the FM IF IC (IC8, pin 12).
41 TEMP
Input port for the transceiver's inter-
nal temperature detection.
42 WXALT
Input port for the WX alert (1050 Hz)
signal.
44 DTMF
Output DTMF, 1750 Hz TONE and
BEEP signals.
45 DTCS Output CTCSS and DTCS signals.
47 P_SQL
Outputs packet squelch control sig-
nal.
High:
While squelch is opened.
48 FAN_CT
Outputs the cooling fan control sig-
nal.
High:
While cooling fan is acti-
vated.
51 DA_DATA
Outputs the data signal to the D/A
converter (IC11, pin 17).
52 DA_CK
Outputs the clock signal to the D/A
converter (IC11, pin 16).
4 - 10
Pin
number
Port name Description
53 DA_STB
Outputs the strobe signal to the D/A
converter (IC11, pin 15).
55 AF_MUTE
Outputs AF mute control signal.
High:
While AF signal is muted.
56 PLLSTB2
Outputs the strobe signal to the UHF
PLL IC (IC2, pin 11).
57 PLLSTB1
Outputs the strobe signal to the VHF
PLL IC (IC1, pin 11).
58 DET_MUTE
Outputs the detector circuit mute sig-
nal.
High:
While detector circuit is
muted.
62
MIC_SENS
Outputs microphone sensitivity con-
trol signal.
High:
The sensitivity is high.
63 U_VCO
Outputs the UHF VCO control signal.
High:
While operating on 230–
999.99 MHz.
65
1200_
9600SEL
Outputs the packet baud rate select
signal.
Low:
When 9600 bps is selected.
66 RX800
Outputs the 800_R5 regulator (Q29)
control signal.
Low:
While receiving on 810–
999.99 MHz.
67 RX400
Outputs the 400_R5 regulator (Q28)
control signal.
Low:
While receiving on 230–550
MHz.
72 RXUHF
Outputs the UHF_R5 regulator (Q27)
control signal.
Low:
While receiving 430–450
MHz.
73 RXVHF
Outputs the VHF_R5 regulator (Q26)
control signal.
Low:
While receiving on 136–174
MHz.
74 MMUT
Outputs the modulation mute control
signal to the VCO circuits.
High:
While modulation is muted.
78 R5CTRL
Outputs the R5 regulator (Q24) con-
trol signal.
Low:
While receiving.
81 V_VCO
Outputs the VHF VCO control signal.
High:
While operating on 136–
174 MHz.
83 PLLSW Outputs the PLL loop control signal.
84 ULCK
Input port for the PLL unlock signal.
High:
The PLL circuit is unlocked.
90 PLLDATA
Outputs the PLL data signal to the
PLL ICs (IC1, IC2).
91 PLLCK
Outputs the PLL clock signal to the
PLL ICs (IC1, IC2).
99 WN_SEL
Outputs the wide/narrow FM select
signal.
High:
While wide FM is selected.