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10-9
NOTE:PLACE THESE CAP. AS CLOSE AS
NOTE: GPIO INTERNAL PULL-UP
NOTE: THE RESISTOR FOR OPT BEAD
POSSIBLE TO IFIC MIC+ AND MIC- PINS
STH-A221_IFIC
39
C154
R120
10PF
C151
C102
100NF
1UF
6.3V
10UF
C107
C148
C117
100NF
22PF
R117
NC
330K
C126
68PF
C147
23
20
22
R142
C129
47K
100NF
C161
NC
C112
100NF
VBAT
6.3V
2.2UF
C149
C171
NC
C138
NC
1
2
3
45
6
C139
U104
NC
100NF
C110
R141
20K
C115
100NF
1
2
3
4
5
ZD102
C153
12PF
8
C173
100PF
6
NC
C137
Q101
2
3
1
TH101
D101
100NF
C160
C122
68PF
R129
ZD104
1
2
3
4
5
15K
CE1
CE2
6
5
CE3
GND
4
VDD
8
VOUT1
1
2
VOUT2
VOUT3
3
VCC
U103
7
68PF
C120
C135
68PF
R116
330K
39
R135
2
3
4
5
68PF
C121
C177
Q103
1
10PF
C152
10PF
L105
R130
15K
18
R125
39
VCC
1.8K
R128
26
25
AU101
1
2
3
4
ZD103
1
2
3
4
5
220K
R136
R124
39
AVCC
R144
100K
R108
10K
C124
68PF
4
1
D105
39
Q102
2
3
R118
C103
10NF
R113
R112
57.6K,1%
14
0
15
13
C106
100NF
C134
68PF
VCC
51
R133
C174
100NF
C1
14
100NF
C101
100NF
9
AVCC
100PF
C179
7
10
21
L103
82nH
100NF
C111
10PF
C128
330K
36K
R115
100NF
C108
R105
15K
R114
100NF
C104
6
6
7
7
8
8
9
9
18
19
19
2
2
20 20
21
21
22 22
3
3
4
4
5
5
10
11
11
12
12
13 13
14 14
15
15
16 16
17
17
18
CN101
1
1
10
100PF
C116
VCC
10PF
C144
24
C143
100NF
NC
C159
29
30
27
VCC
NC
C146
6
XAUSO
C172
100PF
57
TX_Q
TX_QN
58
TX_SYNC
33
37
VALID_STRB
43
WBORX
WBOTX
44
XAUXI-
5
4
XAUSI2
59
TXDA_REF
TX_BAT
38
34
TX_CLK
36
TX_DATA1
TX_DATA2
35
TX_I
60
TX_IN
61
68
TX_PWR
49
RX_QN
31
RX_SYNC
22
SCLK
SEN
24
SI
23
SO
21
TIMER
17
TMP_MON
66
RSSI
69
41
RST
55
R
T_COMO
RX_CLK
32
RX_DATA
30
RX_I
50
51
RX_IN
RX_Q
48
18
MSTR
73
PA_CNT
2
RAUXO-
REC20+
79
77
REC20-
RINGER
1
RIT
O
_COMI
56
RQTI_COMO
54
20
MDA
T
12
MICI+
MICI-
11
10
MICO
MIXI
9
MOD
63
MODE_STS
26
MOD_COMD
62
45
DGND1
DGND2
46
16
DVDD
D_IF_OUT
42
70
EXT_VREF
25
FSYNC
75
IREF
MCLK
19
14
A
VDD3
74
AVDD4
AVDD5
80
47
A_IF_IN
67
BAT_MON
BBCLK
40
39
BIN
DEMOD
52
AUDCOMRD
3
8
AUDCOMT
O
29
AUX_CLK
AUX_DATA
27
AUX_MON
65
28
AUX_STRB
53
A
V
DD1
A
VDD2
13
AFC_OUT
71
72
AGC_OUT
AGND1
64
AGND2
7
78
AGND3
AGND4
15
AGND5
76
U101
C142
100NF
R109
0
R103
18K,1%
ZD101
1
2
3
4
5
AVCC
51
R134
R110
0
L101
BATT
VCC
BATT
68PF
C170
C169
68PF
C166
C168
68PF
C167
68PF
68PF
0
R111
C131
68PF
100PF
C178
68PF
C123
R107
560K,1%
R106
680K
68PF
C130
VBAT
VAUX
C176
10UF
6.3V
GND
VIN
1
VOUT
5
C181
2.2UF
6.3V
U106
4
BYP
CONT
3
2
V_VCTCXO
68PF
C125
10
R139
R143
100K
C157
R102
10K
NC
R122
39
10PF
C175
C133
68PF
82nH
L104
17
10K
R101
19
16
4
-IN
BYP
2
GND
8
7
GND
OUT
5
1
SHDN
VDD
6
U105
+IN
3
28
C140
NC
68PF
C132
VBAT
C118
R131
1.8K
100NF
100NF
C163
C158
NC
100NF
C105
R145
100K
C109
100NF
11
D102
12
D103
3
1
2
AVCC
L102
R127
VBAT
1K
R137
6.3V
10UF
C141
220K
R119
39
NC
39
C113
68PF
R121
100NF
C145
C136
1K
R132
C156
27PF
C150
10UF
6.3V
AVCC
1UF
C162
R138
100K
5
C180
27PF
C165
100NF
2.7K
R104
R126
100K
C155
12PF
R140
47K
C164
33UF
6.3V
AVCC
R123
39
2
C127
100NF
CN102-1
1
3
C1
19
68PF
AUX_ON
D104
MICRO-
KEY(1)
SCAN(7)
SCAN(5)
SCAN(3)
SCAN(1)
MICRO+
ON_SW
SCAN(6)
SCAN(4)
SCAN(2)
SCAN(0)
KEY(0)
KEY(2)
LED_ON
ALT_LED_ON
SVC_LED_ON
REED_SW
SPK-
SPK+
DISPLAY_CS
TMP_MON
RAUXO
RAUXO
AMP_AUDIO_OUT
MICRO+
MICRO-
VAUX
MEMWEB
WBDTX
DEMOD
BAT_MON
MIC-
VCTCXO_PC
V_VCTCXO
TXDA_REF
TX_CLK
TX_SYNC
TX_DATA1
AMP_EN
SCAN(5)
KEY(0)
SCAN(0)
KEY(2)
SCAN(3)
SCAN(7)
SCAN(1)
SCAN(4)
KEY(1)
SCAN(2)
SCAN(6)
RINGER
BIN
TX_BAT
IFIC_RESET
D_IF_OUT
A_IF_IN
RINGER
RX_I
RX_IN
RX_Q
RX_QN
TX_I
TX_Q
TX_QN
MIC+
TX_AUDIO
XAUXI-
MIC+
MIC-
PA_CNT
V_F
V_F_EN
HS_SENSE
SEND_END
XAUXI-
MIC+
HEADSET_SENSE
REC20-
REC20+
AFC_OUT
AGC_OUT
MOD
MODE_STS
REC20-
REC20+
RSSI
TX_IN
TX_PWR
STRB0
SCLK
DO
FSYNC
SO2
SEN
SCK
SI2
RX_DATA
RX_SYNC
RX_CLK
AUX_CLK
AUX_STRB
AUX_DATA
BBCLK
WBDRX
VALID_STRB
MEMOEB
ADD(2)_T
RESET
SPK+
SPK-
EL_EN
VIBRATOR
DATA(6)_T
DATA(2)_T
DATA(5)_T
DATA(4)_T
DATA(3)_T
DATA(1)_T
DATA(7)_T
DATA(0)_T
HEADSET_SENSE
RX_AUDIO
XAUXI-
RX_AUDIO
HEADSET_SENSE
AMP_AUDIO_OUT
MIC_BIAS_EN
MIC-
3. IFIC Circuit Diagram
STH-A225
Circuit Description & Circuit Diagrams