SimCom SIM900 Hardware Design

SIM900 Hardware Design
6.3 PIN Assignment of SIM900
SIM900
TOP VIEW
1
2
17
3
4
10
5
11
6
12
13
7
14
8
15
16
9
52 53 68 54 55 61 56 62 57 63 64 58 65 59 66 67 60
51
50
35
49
48
42
47
41
46
40
39
45
38
44
37
36
43
34 33 18 32 31 25 30 24 29 23 22 28 21 27 20 19 26
PWRKEY_OUT
PWRKEY
DTR
RI
DCD
DSR
CTS
RTS
TXD
RXD
DISP_CLK
DISP_DATA
DISP_D/C
DISP_CS
VDD_EXT
NRESET
GND
GND
MIC_P
MIC_N
SPK_P
SPK_N
LINEIN_R
LINEIN_L
ADC
VRTC
DBG_TXD
DBG_RXD
GND
SIM_VDD
SIM_DATA
SIM_CLK
SIM_RST
SIM_PRESENCE
PWM1
PWM2
SDA
SCL
GND
GPIO1/KBR4
GPIO2/KBR3
GPIO3/KBR2
GPIO4/KBR1
GPIO5/KBR0
GPIO6/KBC4
GPIO7/KBC3
GPIO8/KBC2
GPIO9/KBC1
GPIO10/KBC0
GND
GND
NETLIGHT
GND GND
VBAT VBAT VBAT
GND
GND
RF_ANT
GND GND GND GND GND
STATUS
GPIO11
GPIO12
Figure 41: SIM900 pin out diagram (Top View)
Table
31: PIN assignment
Pin Number Pin Name Pin Number Pin Name
1
PWRKEY
35
PMW1
2
PWRKEY_OUT
36
PWM2
3
DTR
37
SDA
4
RI
38
SCL
5
DCD
39
GND
6
DSR
40
GPIO1/KBR4
7
CTS
41
GPIO2/KBR3
8
RTS
42
GPIO3/KBR2
9
TXD
43
GPIO4/KBR1
SIM900_HD_V1.05 06.23.2010
56

SimCom SIM900 Specifications

General

Brand	SimCom
Model	SIM900
Category	Modem
Language	English