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7-30
VCC2.85
U0202
MAX5452
3
1
VDD
EEPOT_2_CS*
CS1
10
EEPOT_CS*
CS2
2
EEPOT_U_D*
U_D
9
EEPOT_INC*
INC
GND
8
Programmable pre-amp stage
TP0201
-9 dB to +14 dB
TEST_POINT
C0228
150pF
C0239
0.1uF
VCC2.85
VAG
R0235
R0226
10K
36K
2
4
9.3V_TX
1
MIC_C
MIC_A
3
MIC_B
11
U0201
C0206
VAG
MC33204
1uF
R0200
1K
7 dB Attenuation Stage
MIC_PREAMP_OUT
MIC_PREAMP_IN
1
R0236
9.1K
C0223
R0204
4.7uF
560
MIC_HI*
MIC_HI
C0234
0.1uF
C0207
33pF
VCC2.85
U0208
2
NLAST4599
VPOS
0.1uF
4
C0225
AUX_TX*
NC
C0212
AUX_TX
0.1uF
5
COM
C0242
0.1uF
AUX_MIC*
6
NO
IN
1
AUX_MIC
MUX_AUX_TX
GND
Figure 7-22. HUD4022A Controller Audio Schematic
June 15, 2005
Ground
C0201
0.1uF
4
W1
7
MIC_E
W2
AUDIO_GROUND
5
L1
6
L2
Anti-aliasing filter
R0202
R0203
3.3K
1K
C0230
470pF
R0230
MIC_F
33K
R0229
C0231
Programmable pre-amp stage
68K
220pF
-14 dB to +14 dB
C0205
150pF
TP0202
TEST_POINT
C0232
470pF
VCC2.85
C0235
470pF
R0207
U0201
7.5K
6
4
MC33204
7
MIC_D
5
R0228
11
VAG
33K
C0233
220pF
TP0200
TEST_POINT
VCC2.85
U0209
NLAST4599
2
VPOS
C0224
4
NC
0.1uF
TP0205
TEST_POINT
5
COM
6
NO
IN
1
MUX_TX
GND
3
VAG
VCC2.85
U0203
NLAST4599
2
C0227
VPOS
0.1uF
NC 4
AUX_TX_A
C0202
0.1uF
5
AUX_TX_B
COM
6
1
IN
NO
MUX_MICATTEN
R0205
GND
3
47K
SC0002
SIGNAL_CONVERT
1
2
R0225
I1
I2
10K
UNIVERSAL GROUND
VCC2.85
R0218
1K
VCC2.85
C0236
U0201
470pF
VCC2.85
9
4
MC33204
8
MIC_G
10
11
MIC_H
SAP_DCLK
C0237
R0227
SAP_RX
220pF
SAP_FSYNC
68K
CODEC_PWR_DOWN
MIC_I
MIC_M
VCC2.85
R0210
R0209
100K
10K
VCC2.85
TP0203
NP
U0201
13
4
MC33204
R0206
100K
14
MIC_J
12
MIC_K
MIC_L
11
VCC2.85
C0203
0.1uF
C0238
R0219
220pF
1K
SAP_TX
RX_AUDIO_IN
SPI_SCKA
VCC5
EEPOT_3_CS*
SPI_MOSIA
U0206
C0210
7
LM1971
0.1uF
6
VDD
CLK
4
LOAD
R0224
5
DATA
0
1
VREFIN
8
2
VOL_OUT
R0223
VOLUME_IN
2
IN
OUT
18K
GND
3
DNP
3
4
5
U0207
LM7301
C0211
DNP
100pF
VCC2.85
R0201
0
R0221
10K
Q0200
47K
AUDIO_PA_EN
R0222
10K
47K
Schematics, Component Location Diagrams, and Parts Lists: HUD4022A (VHF) Main Board
MIC_N
CODEC_OUT_A
VCC2.85
C0213
0.1uF
R0212
C0204
100K
4.7uF
R0208
6
100K
9
VDD
BCLKR
12
BCLKT
11
MCLK
8
2
CODEC_OUT
DR
RO_NEG
7
R0216
FSR
10
U0200
100K
PDI
14 FST
MC145483
4
CODEC_OUT_B
PO_NEG
3
5
PI
PO_POS
18
17
TI_NEG
TG
19
13
TI_POS
DT
16
HB
C0240
1
20
VAGREF
VAG
0.1uF
VSS
C0208
15
VCC2.85
1uF
VAG
U0210
NLAST4599
2
C0209
VPOS
0.1uF
NC
4
C0216
AUX_RX*
0.1uF
5
COM
6
1 IN
NO
MUX_RX
GND
TP0206
SC0001
A+
A+_FILT
TEST_POINT
SIGNAL_CONVERT
1
2
I1
I2
VOL_OUT*
1
7
C0215
VCC5
VCC
0.1uF
AUDIO_PA_IN
9
4
INV
OUT1
1
U0204
NINV
SW_A+
3
RR
TDA1519C
8
6
M_SS
OUT2
C0217
C0220
R0220
18K
3300pF
10uF
TP0204
RX_FILT_AUDIO
CODEC_OUT_C
C0226
0.1uF
AUX_RX
R0231
2.7
C0214
C0221
0.1uF
10uF
SPKR+
SPKR-
C0243
C0244
6800pF
6800pF
73D02970C73-O
SHEET 4 OF 23
6815854H01-A
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