Hln6837A Astro Spectra Plus Rf Interface Schematic (Sheet 2 Of 2) - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

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A
B
C
D
VCC3.0
0
1
2
3
4

HLN6837A ASTRO Spectra Plus RF Interface Schematic (Sheet 2 of 2)

September 5, 2008
A9
PG6
B9
PG5
A8
PG4
C6
PG3
C7
PG2
A7
PG1
A6
PG0
G1
NC45
D2
A8
E1
A9
G5
A10
E2
A11
F1
A12
E3
A13
H1
A14
H2
RS0
H5
RS1
H3
RS2
J3
RS3
K3
RS4
KRSIC
J1
RDX
G2 U200
WRX
G3
CS1X
B1
NC46
F4
NC11
E4
NC12
D5
NC13
D6
NC14
D7
NC15
D8
NC16
A12
NC17
B12
NC18
A11
NC19
C11
NC20
C10
NC21
D11
NC22
B8
NC23
M5
ABA_CLK
L5
ABA_FSYNC
M6
ABA_RXD
C220
0.1uF
C219
0.1uF
Schematics, Component Location Diagrams and Parts Lists: ASTRO Spectra Plus VOCON Section
R241
VCC3.0
R240 5.6K
3.3K
VCC3.0
R214
270
Q202
VCC3.0
R216
0
B5
D0
1 33
A4
D1
2
C3
D2
3
C4
D3
4
B4
D4 TP214
5
C2
D5
6
C1
D6 TP215
7
D1
D7
TP216
E5
FLASH_CSX
C5
PRAM_A13 TP217
B6
DATA_RAM_CSX
A5
PRAM_CSX
D12
SSI_DO
C12
SSI_DI
D9
SSI_CLK
E12
SSI_FSYNC
G12
C210
AUX_INTX
F10
EIGHTKHZ_INTX
E10
INTX
10pF *R221*
18K
H8
MSTR_CLK_HI
H12
MSTR_CLK_LO
G8
DSP_CLK
R222
F12
HC12_CLK 100K
L4
RESETX
M3
CLK_RSTX
VCC3.0
C9
ENC_RXD
B10 C212
ENC_TXD
0.1uF
A10
ENC_CLK
E9
R232
NC1
F9 10K
NC2
G9
NC3
H9
NC4
J8
NC5
J7
NC6
J6
NC7
J5
R223
NC8
H4
10K VCC3.0
NC9
G4
NC10
C209
0.1uF
R242
R243
R245
DNP
390
DNP 15K 560 R234
VCC5.0
DNP 100
Q200 R250
SBI
O
ABACUSII
4.7K ODC
I
L200 DOUT*
I INTERFACE
DOUT
I
270nH
VCC3.0
R213
270
Q201
R215
33
VCC3.0
R246 R248
5.6K 5.6K
R247 R249
18K
DNP Q203
DNP 18K Q204
R219 R220
330
330
KRSIC_SEL
I
MOSIB
I
O MISOB
QSCKB
I
RESET_OUT
I
C211
.01uF
16.8MHz
I
VCC3.0
VCC3.0
R230
100K
R229
100K
8Khz_DSP
O
TP218 TP219
TP220 TP221
TP222 TP223
ABA_RXD
O
ABA_FSYNC
O
ABA_CLK
O
KRSIC_CS
I
KRSIC_WR
I
KRSIC_RD
I
KRSIC
QSPIB
KRSIC SSI
BBP-ABAII
KRSIC R/W*
6881076C25-E