Table of Contents
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C406
C408
POS
C409
C426
NEG
25
26
27
28
29
30
31
32
33
34
35
36
SCP
SCN
24
RF2VDD
D3VDD 39
23
RF12VBAT
SIMD3VBAT 40
22
RF1VDD
21
SIMVCC
D1VDD
SIMIOCD
20
LPD1VBAT
SIMCKCD
19
U400
LPVDD
18
_SIMRSCD
HCVBAT
SIMEN
17
HCVDD
GPO3
16
D2VDD
GPO2
15
IOD2VBAT
GPO1
14
IOVDD
GND 49
13
GND
_REC2
GND 51
GND
NC 53
NC
12
11
10
9
8
7
6
5
4
3
2
1
C423
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BU_RST
C413
37
38
R405
41
42
43
44
45
46
47
V401
C421
48
50
52
54
TP400
7- 9
F low Chart of Troubleshooting
2.9V
+VDD_SLEEP
1.8V
+VDD_IO_LOW
1.8V
SIM_VCC
SIM400
SIM_IO
SIM_CLK
1
6
2
5
3
SIM_RST
4
G
G
G
G
10
9
8
7
C417
C418
C419
C420
AUX_ON
SCL
SDA
32KHz_DIGIT
PON_TX
REF_ON
SIMRST
SIMCLK
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