User's Manual

SIM900B Hardware Design
6.6 PIN Assignment of SIM900B
Table 30: PIN assignment
PIN NO. PIN NAME I/O PIN NO. PIN NAME I/O
1
VBAT I
2
VBAT I
3
VBAT I
4
VBAT I
5
VBAT I
6
VBAT I
7
VBAT I
8
VBAT I
9
GND
10
GND
11
GND
12
GND
13
GND
14
GND
15
VRTC I/O
16
SIM_PRESENCE I
17
VDD_EXT O
18
DISP_DATA I/O
19
SIM_VDD O
20
DISP_CLK O
21
SIM_DATA I/O
22
DISP_CS O
23
SIM_CLK O
24
DISP_D/C O
25
SIM_RST O
26
DISP_RST O
27
KBC0 O
28
DCD O
29
GPIO4/KBC1 I/O
30
NETLIGHT O
31
GPIO3/KBC2 I/O
32
GPIO0 I/O
33
GPIO2/KBC3 I/O
34
PWRKEY I
35
GPIO1/KBC4 I/O
36
BUZZER O
37
KBR0 I
38
DTR I
39
GPIO9/KBR1 I/O
40
RXD I
41
GPIO8/KBR2 I/O
42
TXD O
43
GPIO7/KBR3 I/O
44
RTS I
45
GPIO6/KBR4 I/O
46
CTS O
47
DBG_RXD I
48
RI O
49
DBG_TXD O
50
AGND
51
AGND
52
ADC0 I
53
MIC1P I
54
SPK1P O
55
MIC1N I
56
SPK1N O
57
MIC2P I
58
SPK2P O
59
MIC2N I
60
SPK2N O
SIM900B_HD_V1.03 24.06.2010
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