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P101
ADDRESS LATCHES
A0-A19
A16-A19
A12-A15
A-D
A-D
U103
U133
D1
G1
MREQ 15
G2
Q3
TX FIFO
U101E
U154B
MSTB 16
TX FIFO
DIR
S1
DE
S0
U101C
U154D
U161
MR
D0-D7
D0-D7
DOR
A0-A7
VOTER DATA IN 58
U162D
U119
+9V REG
RESET
+15V 30
Z102
U136
+15V 62
Q4
Q5
Q6
Q7
Q8
Q9
RX FIFO
Q2
DATA BUS (7:0)
MPC LATCH
Q1
P100
OC
EXT REQ
D3
Q1-Q8
U105
LOCAL MIC PTT
D4
D2
Q102
D1
ACCRESS BUS (15:8)
AUDIO/DATA
MICROPROCESSOR
P3-6
P3-7
P1-3
P1-0
U111
P1-1
P1-1
P1-2
Y2
Y1
A13
D0-D7
A
A14
A8-A15
B
U102
A15
P3-0
C
RST
ADDRESS SELECT
ALE
ADDRESS/DATA BUS (7:0)
PSEN
P1-6
U159B-8 LOGIC SQUELCH
P1-7
U125D-14 RX DATA
P3-2
U126A-3 TX DATA
P3-3
U126A-3 TX SHAPE
P3-4
U117B-8 TX DATA EN
GATE LATCHES
U101F
U154A
RX FIFO
DE
DOR
S0
U160
A0-A7
D0-D7
MR
DIR
S1
U119
U101D
LOWER ADDRESS LATCH
EPROM
Q1-Q8
D0-D7
A0-A7
D1-D8
U104
U112
A8-A14
C EN
OE
October 1999
Part No. 001-2009-201
U115A VOTER AUDIO MUTE
U108
U114D LOCAL AUDIO MUTE
U113C RX MUTE
U114A RX OPTION
D1-D8
U115B RX VOICE
U116B RX AUDIO
U115C RX VOICE TO BACKPLANE
CLK
U116A FSK TO AUDIO
U153C REPEAT
U107
U153D TxS TO FSK
U116D TxA TO FSK
U159C DATA TO A D
D1-D8
U116C Tx AUDIO
U158A Tx VOICE
U153A DATA LEVEL TEST
CLK
U100B CWID CONTROL
U159A LEVEL DETECT
U106
U158C Tx OPTION
U117C LOCAL MIC MUTE
U118C EXTERNAL MOD MUTE
D1-D8
U118B NORMAL MOD MUTE
U118D Tx MOD MUTE
U151-U149 INC
CLK
U151-U149 U/D
CS0
U156
CS1
CS2
CS3
D1-D8
WO 125
CS5
CS6
CLK
WO 126
U153B Tx NET
U155
U115D Rx NET
CS10
CS11
D1-D8
U149 CS12
WO 127
U151 CS14
CLK
CS15
U117A Tx INTERCOM
U157
U113D Rx SQ ACTIVE
U159B LOGIC SQ A D
U159D Tx MOD A D
D1-D8
U113B NORMAL Rx
WO 118
WO 117
CLK
WO 116
MAIN AUDIO CARD LOGIC BLOCK DIAGRAM
FIGURE 6-21
6-50
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