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Quad-band GSM/GPRS module
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SIM900 EVB User Guide
SIM900-EVB_UGD_V1.01
17
0
8
.
1
2
.
2
0
0
9
7 KCOL3
8 KROW3
9 KCOL4
10 KROW4
11
PWRKEY_O
UT
O
POWER KEY
OUT
12
PWRKEY
I
POWER KEY
IN
13 GND
POWER
GND
14 VBAT
POWER
POWER
1
...
...
15
16
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19
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20
