User's Manual

Smart Machine Smart Decision
SIM7100A_User Manual_V1.01 2014-12-11
17
67 CTS 68 RXD
69 RI 70 DCD
71 TXD 72 DTR
73 PCM_OUT 74 PCM_IN
75 PCM_SYNC 76 PCM_CLK
77 GND 78 GND
79 GNSS_ANT 80 GND
81 GND 82 MAIN_ANT
83 RF_CFG1 84 RF_CFG2
85 BOOT_CFG0 86 RF_CFG3
87 BOOT_CFG1
2.2 Pin description
Table 5: IO Parameters Definition
Pin Type Description
PI Power input
PO Power output
IO Bidirectional input / output
DI Digital input
DO Digital output
AI Analog input
Table 6: Pin description
Pin name Pin No. I/O Description Comment
Power Supply
VBAT
38,39,
62,63
PI Power supply voltage
NC 42
No connection
Please keep open
VDD_EXT 44 PO
LDO power output for SD card
circuit or other external circuit
with MAX. 150mA output. This
LDO output voltage can be
changed by the AT command
“AT+CVAUXV”.
If unused, please keep
open.
VDD_1V8 15 PO
1.8V SMPS output for external
circuit, such as level shift circuit.
Recommend placing a
10uF and 100nF
capacitors to improve
the stability of the
internal 1.8V SMPS