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Fibocom FM101-GL - 3.4 USIM Interface

Fibocom FM101-GL
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3 Application Interface
Copyright © Fibocom Wireless Inc. 32
100KΩ
MODEM_RESET
2SC4617
39pF
22KΩ
RESET#
1.8V
RESET#
(1.8V)
Module
Reset impulse
Figure 9. Recommended design for reset circuit
There are two reset control timings as below:
Reset timing 1
st
in Figure 10, PMU of module internal always on in reset sequence,
recommend using in FW upgrade and module recovery;
Reset timing 2
nd
in Figure 11, PMU of module internal will be off in reset sequence
(including whole power off and power on sequence, t
sd
can refer section 3.3.2),
recommend using in system warm boot.
+3.3V
RESET#
Module State
InitializationActivation
FCPO#
typical TBD
Baseband reset Activation
toff1
Figure 10. Reset timing 1st

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