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