SimCom SIM900E User Manual page 2

SIM900E Document
1.3. Pin Name and IO Characters
Pin No. Pin Name
1 GND
2 SPK_P
3 SPK_N
4 GND
5 MIC_N
6 MIC_P
7 GND
8 NETLIGHT
9 GND
10 SIM_CLK
11 SIM_DATA
12 SIM_RST
13 SIM_VDD
14 STATUS
15 NRESET
16 RXD
17 TXD
18 GND
19 RTS
20 CTS
21 DTR
22 RI
23 DCD
24 GPIO11
25 GND
26 GND
27 GND
28 RF_ANT
29 GND
30 VBAT
31 VBAT
32 VBAT
33 GND
34 GND
69 GND
I/O Pin No.
35
O 36
O 37
38
I 39
I 40
41
O 42
43
O 44
IO 45
I 46
O 47
O 48
I 49
I 50
O 51
52
I 53
O 54
I 55
O 56
O 57
IO 58
59
60
61
IO 62
63
I 64
I 65
I 66
67
68
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Pin Name I/O
VDD_EXT O
PWRKEY I
I
ADC
IO
GPIO12
IO
SDA
IO
SCL
I
DBG_RXD
O
DBG_TXD
IO
VRTC
I
SIM_PRESENCE
IO
GPIO8/KBC2
IO
GPIO1/KBR4
IO
GPIO9/KBC1
IO
GPIO6/KBC4
IO
GPIO7/KBC3
IO
GPIO5/KBR0
IO
GPIO4/KBR1
IO
GPIO2/KBR3
IO
GPIO3/KBR2
IO
GPIO10
O
PWM2
O
PWM1
O
DISP _CLK
O
DISP _CS
O
DISP_DATA
IO
DISP _D/C
GND
GND
GND
GND
GND
GND
GND
GND