SimCom SIM5300E Hardware Design page 17

IO Bidirectional input / output
DI Digital input
DO Digital output
AI Analog input
AO Analog output
Table 5: Pin description
Pin name Pin number
Power supply
VBAT 55,56,57
VRTC 26
VDD_EXT 15
2,17,18,29,39
,45,46,54,58,
GND
59,61,62,63,6
4,65
Power on/down
PWRKEY 1
SIM5300E_Hardware_Design_V1.02
IO Description
PI Power supply
PI/
Power supply for RTC
PO
PO 1.8V output power supply
Ground
PWRKEY should be pulled low at least
DI 100ms to power on or 1s to power
down the module.
Comment
It is recommended
to connect with a
battery or a
capacitor (e.g.
4.7uF).
At all times,
VDD_EXT must not
be influenced by
any external voltage
above 2V. If it is
unused, keep
floating.
Pulled up internally.
9