Motorola HT1250-LS+ - Audio and Tone Settings; Customizing Audio and Tone Features

Schematic Diagrams, Overlays, and Parts Lists 5-35
G
G
G
EEPROM
4Kx8 BIT
6.8pF
C852
100K
5V
100K
R852
R853
1uF
C851
R851
100K R859
220K
R855
NU
R861
R860
NU
NU
LM2904
U851-1
2
3
1
8
4
C853
U851-2
LM2904
6
5
7
8
4
16pF
0
R456
DISC
15K
R451
100K
R452
NU
NU
R455
R454
NU
R453
0.1uF
C856
Vdda
0
R854
C855
C854
51pF
NU
R483
0
Q400
3
1
2
100K
R856
2.7K
R427
C412
10uF
C405
100pF
NU
C406
C480
10uF
R416
10K
0
R405
R401
0
R402
NU
C452
1uF
R475
0
24K
R476
R406
75K
0.1uF
C416
.022uF
C451
R449
24K
R445
24K
ERROR
5
FEEDBACK
7
GND
4
INPUT
8
OUTPUT
1
SENSE
2
SHUTDOWN
3
VTAP
6
27
VOX
7
U400
LP2951ACMM-3.3
36
TXSND
44
UIO
10
VDDA
1
VDDCP
32
VDDD
33
11
VDDDAC
VDDRC
45
VDDSYN
8
PLCAP2
25
43
RXRTN
39
RXSND
12
SQCAP
SQDET
17
9
SQIN SYN
28
TXRTN
23
HSIO
19
LCAP
24
LSIO
18
MICEXT
48
MICINT
46
MOD
40
NC
26
PLCAP
13
GCB3
35
GCB4
37
GCB5
38
GNDA
3
GNDD
31
30
GNDDO
GNDRC
47
GNDSYN
6
DACR
5
DACU
4
DATA
22
DISC
2
F1200
29
GCB0
15
GCB1
14
GCB2
AUDIO
41 42
AUXTN
CHACT
16
CLK
21
CLK168
34
CSX
20
DACG
SO
2
VCC
8
4
VSS
WP
3
30C53
U404
X25128-2.7
CS
1
HOLD
7
SCK
6
SI
5
Q405
2
4
13
U407
2.2uF
C403
R407
68K
0.1uF
C402
.01uF
C400
0.1uF
C401
C479
0.1uF
30K
R425
R413
0
TP410
1
R447
1.5MEG
10K
R448
1
3
2
A3
3
K1
2
K2
1
K3
Q403
CR412
4
A1
5
A2
6
0.1uF
0.1uF
C407
C410
R429
75K
0.1uF
C414
C427
100pF
C428
0.1uF
1
2
3
CR440
0.1uF
NU
C422
0.1uF
C419
C411
47K
R400
C421
0.1uF.01uF
C420
100pF
C408
C409
0.1uF
.01uF
1
C415
BATT_DATA_IN
Vddd
TP406
MECH_SWB+
5V
OFF_BATT_DATA_OUT
Vdda
BATT_CODE
Vdda
7.5VDC
EXT_MIC
TX_AUD_RTN
TX_AUD_SND
FLAT_RX_SND
SWB+
DATA
MISO
Vddd
INT_MIC
UNSWB+
URX_SND
RX_AUD_RTN
CLK
CSX
CHACT
SQ_DET
LSIO
HSIO
Vddd
INT_EXT_Vdd
SYN
F1200
EE_CS
VOX
RESET
MODIN
Vdda
Vdda
AUDIO FLAT_TX_RTN
16.8MHz
VS_AUDSEL
VS_GAINSEL
DACRx
EXT_SPKR_SEL AUDIO_PA_ENA
GREEN_LED
RED_LED
LEDBL
Figure 5-29. 700 MHz ASFIC Schematic Diagram