User's Manual

SIM900E Document
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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