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4. TROUBLE SHOOTING
P20: 2V8_VMEM
P21: 1V8_VCORE
VCHARGE
10u
C202
1000p
C252
(2012)
R203
0.33
VBAT
Q201
S
G
5
4
D4
D3
D201
6
3
D5
D2
CUS02
7
2
D6
D1
8
1
TPCF8102
GATE_EN
CHRDET
CHG_EN
EOC
P25: 2V75_VTCXO
VBAT
2V8_VMEM
VCHARGE
VBAT
R202
100K
30
POWERKEY
_PWRONKEY
31
ROWX
KEY_ROW0
29
RPWRON
PWRONIN
VCORE
28
CLK_ON
TCXOEN
1
SIM_EN
SIMEN
15
RESCAP
8
C203
SIMVSEL
0.1u
9
GATEDR
10
GATEIN
12
ISENSE
REFOUT
6
CHRDET
_RESET
14
CHGEN
4
BATSNS
7
CHRIN
13
EOC
33
GND
R209
100K
Circuit Diagram 4-11
P29: RPWRON
Figure 4-17
C201
C253
0.1u
10u
(1608)
VSIM
1V8_VCORE
18
VSIM
2V55_VAN
21
2V75_VTCXO
23
VAN
25
VTCXO
20
VMEM
3
VRTC
26
16
C205
5
0.1u
MVBAT
C208
C211
C209
C213
0.22u
2.2u
2.2u
0.1u
17
NC1
(1608)
(1608)
(1608)
24
NC2
32
NC3
U202
ADP3522XCP-3
- 56 -
P3: 2V0_VRTC
P30: POWRKEY
2V8_VMEM
2V0_VRTC
R204 100
RESET
C206
C207
100p
100p
C212
C210
C214
0.22u
2.2u
0.1u
(1608)
(1608)
R205
10K
BAT1
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