Hln6837E Astro Spectra Plus Vtrans Schematic - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

7-78
KRSIC_DB(7:0)
BRAVO TO KRSIC
KRSIC_CS
KRSIC_RD
KRSIC_WR
KRSIC_AB(4:0)
KRSIC_SEL
MOSIB
QSCKB
RESET_OUT
BRAVO FROM KRSIC
MISOB
8Khz_DSP_int
ABA_RXD
ABA_FSYNC
ABA_CLK

HLN6837E ASTRO Spectra Plus VTrans Schematic

September 5, 2008
KRSIC_DB(7:0)
VCC2.85
VCC2.85
C509
MC74LCX573
0.1uF
R352
10K
U602-3 EN_LE
MC74HC32A
EN_OE
9
0
8 19 U417
Q0
1
10 18
Q1
2
17
Q2
3
16
Q3
4
15
Q4
5
14
Q5
6
13
Q6
7
12
Q7
VCC3.0
MC74LCX573
U602-4
MC74HC32A
12 11
EN_LE
11 1
EN_OE
13
0
U419
2
D0
1
3
D1
2
4
D2
3
5
D3
4
6
D4
5
7
D5
6
8
D6
7
9
D7
KRSIC_AB(4:0)
R355
0
DNP
R356
0
Note:
If R353, R355, and R357 are placed, do not place R354, R356, and R358
Schematics, Component Location Diagrams and Parts Lists: ASTRO Spectra Plus VOCON Section
11
1
0
2
D0
1
3
D1
2
4
D2
3
5
D3
4
6
D4
5
7
D5
6
8
D6
7
9
D7
C510
0.1uF
0
19
Q0
1
18
Q1
2
17
Q2
3
16
Q3
4
15 VCC3.0
Q4
5
14
Q5
6
13
Q6
7
12
Q7
R353
0 C511
DNP MC74LCX573 0.1uF
R354
0
11
EN_LE
1
EN_OE
0 U420
2 19
D0 Q0
1
3 18
D1 Q1
2
4 17
D2 Q2
3
5 16
D3 Q3
4
6 15
D4 Q4
7 14
D5 Q5
VCC3.0
8 13
D6 Q6
9 12
D7 Q7
MC74LCX573
C515
0.1uF
11
EN_LE
1
EN_OE
2 U421 19
D0 Q0
3 18
D1 Q1
4 17
D2 Q2
5 16
D3 Q3
6 15
D4 Q4
VCC2.85
7 14
D5 Q5
8 13
D6 Q6
9 12
D7 Q7
R358
C516
0
0.1uF MC74LCX573
11
EN_LE
1
EN_OE
U422
19 2
Q0 D0
18 3
Q1 D1
17 4
Q2 D2
16 5
Q3 D3
15 6
Q4 D4
14 7
Q5 D5
13 8
Q6 D6
12 9
Q7 D7
KRSIC_DB_3(7:0) KRSIC DATA
KRSIC_DB_3(7:0)
BUS
VCC2.85
C514
0.1uF
U423
NLASB3157
6 3
RESET_OUT SELECT B0 LOGIC_BOOT
4 1
I
TOUT_14_10 A B1 LH_RESETI
KRSIC FROM BRAVO
KRSIC_AB_3(4:0)
O KRSIC_AB_3(4:0)
0
1
2
3
4
O KRSIC_CS_3
O KRSIC_RD_3
O KRSIC_WR_3
O
KRSIC_SEL_3
O MOSIB_3
O QSCKB_3
O RESET_OUT_3
R357
0
DNP
KRSIC TO BRAVO
I MISOB_3
I 8Khz_DSP_3
I ABA_RXD_3
I ABA_FSYNC_3
I ABA_CLK_3
6881076C25-E