Motorola HT1250-LS+ - Phone Functionality; Making Phone Calls via Trunked Systems

Schematic Diagrams, Overlays, and Parts Lists 5-17
NU
NU
NU
7
HOLD
SCK
6
5
SI
2
SO
8
VCCVSS
4
3
WP
1.65V
NU
NU
NU
NU
X25128-2.7
U407
1
CS
3
1
2
C402
0.1uF
Q400
0
R475
24K
R449
TP406
1
R453
220K
C600
6.8pF
100K
R601
16pF
R602
C605
1uF
C601
R604
LM2904
U2000
6
5
7
8
4
4
A1
5
A2
6
A3
3
K1
2
K2
1
K3
CR412
0.1uF
C479
R425
30K
C427
100pF
0.1uF
C414
2
3
1
8
4
R456
0
LM2904
U2000
R430
0
2.7K
R427
100pF
C408
C420
R402
.01uF
0.1uF
C409
R447
1
3
2
1.5MEG
Q403
0.1uF
C421
C422
TP410
1
0.1uF
1uF
C452
C407
0.1uF
0.1uF
C410
C416
0.1uF
220pF
C602
R476
24K
10uF
C480
R448
10K
R452
100K
R454
R400
47K
.022uF
R429
C451
10K
R451
15K
0
R401
27
VDDSYN
7
VOX
R603
100K
36
TXRTN
44
TXSND
10
UIO
1
VDDA
32
VDDCP
33
VDDD
11
VDDDAC
45
VDDRC
8
PLCAP
25
PLCAP2
RXRTN
43
RXSND
39
SQCAP
12
17
SQDET
9
SQIN
28
SYN
23
GNDSYN
19
HSIO
24
LCAP
18
LSIO
48
MICEXT
46
MICINT
40
MOD
26
NC
13
GCB2
35
GCB3
37
GCB4
38
GCB5
3
GNDA
31
GNDD
GNDDO
30
47
GNDRC
6
DACG
5
DACR
4
DACU
22
DATA
2
DISC
29
F1200
15
GCB0
14
GCB1
41
AUDIO
AUXTN
42
16
CHACT
21
CLK
34
CLK168
20
CSX
U404
30C53
68K
R407
0.1uF
C415
C403
2.2uF
0
R616
R615
.01uF
C419
75K
R406
CR440
1
2
3
R605
100K
R606
100K
R405
0
C401
0.1uF
C411
C604
0.1uF
220pF
C603
0.1uF
0
R413
8
INPUT
1
OUTPUT
2
SENSE
3
SHUTDOWN
6
VTAP
LP2951ACMM-3.3
U400
5
ERROR
7
FEEDBACK
4
GND
R600
R455
4
13
24K
R445
Q405
2
C428
0.1uF
R416
C400
.01uF
MECH_SWB+
DEMOD
3.3V
SWB+
3.3V
5V
10K
4V_3.3V
SYN
F1200
DATA
CLK
Vddd
MISO
EE_CS
OFF_BATT_DATA_OUT
BATT_DATA_IN
BATT_CODE
TX_AUD_SND
FLAT_RX_SND
INT_MIC
UNSWB+
URX_SND
RX_AUD_RTN
CSX
CHACT
SQ_DET
LSIO
HSIO
Vddd
INT_EXT_Vdd
5V
3.3V
Vddd
VOX
RESET
MODIN
3.3V
AUDIO FLAT_TX_RTN
16.8MHz
VS_AUDSEL
VS_GAINSEL
DACRx
EXT_SPKR_SEL
UDIO_PA_ENA
GREEN_LED
RED_LED
LEDBL
EXT_MIC
TX_AUD_RTN
Figure 5-15. 200 MHz ASFIC Schematic Diagram