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SIM900D - Hardware Design

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Part number SIM900D
Manufacturer SIM Com
File Size 2.76 MB
Description Hardware Design
Datasheet download datasheet SIM900D Datasheet
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Description

14 3.3 Package Dimensions 16 4 Application Interface 18 4.1 Power Supply 18 4.1.1 Minimizing Voltage Drop of VBAT 19 4.1.2 Monitoring Power Supply 19 4.2 Power on/down Scenarios 19 4.2.1 Power on SIM900D 19 4.2.1.1 Turn on SIM900D Using the PWRKEY Pin (Power on) 19 4.2.1.2 Turn on the SIM900D using the VCHG signal 20 4.2.2 Power down SIM900D 21 4.2.2.1 Power down SIM900D by the PWRKEY Pin 21 4.2.2.2 Power down SIM900D by AT Command 21 4.2.2.3 Over-voltage or Under-voltage Power down 22

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