User's Manual

Smart Machine Smart Decision
SIM5320A_Hardware Design_V1.01 2011-2-29
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3.2 Power on/off Time Sequence
3.2.1 Power on Sequence
SIM5320A can be powered on by POWER_ON pin, which starts normal operating mode.
POWER_ON pin is pulled up with a 200kR resistor to 1.8V in module. User can power on the SIM5320A
by pulling the POWER_ON pin down for a short time. The power-on scenarios are illustrated in the
following figures.
4.7 K
47K
Turn on/ off impulse
POWER_ON
Power
on / off logic
200K
1.8V
MODULE
Figure 17: Power on Timing Sequence