3 Application Interface
Copyright © Fibocom Wireless Inc.
29
Figure 6. Circuit for module start-up controlled by AP
3.3.1.2
Start-up Timing Sequence
When power supply is ready, the PMU of module will power on and start initialization
process by pulling high FCPO# signal. After about TBDs, module will complete initialization
process. The start-up timing is shown in Figure:
+3.3V
t
pr
RESET#
t
on
Module State
Initialization
Activation(AT Command Ready)
FCPO#
typical TBDs
OFF
Figure 7. Timing control for start-up
Index Min.
Recommende
d
Max. Comment
t
pr
0ms
-
-
The delay time of power supply rising from 0V up
to
POWER_ON/OFF#
PMU
Module
AP
GPIO
(Reserved)
FULL_CARD_POWER_OFF#
(3.3/1.8V)
(1.8V)
100K
Ω
22K
Ω
