Hardware Guide

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FIBOCOM L860-GL Series Hardware Guide Page 29 of 60
+3.3V
PERST#
tpd
RESET#
Module State
FinalizationActivation
FCPO#
toff1
tsd
OFF
AT+CFUN=0
toff2
Figure 3-6 Shutdown timing control
Index
Min.
Recommended
Max.
Comment
t
off1
16ms
20ms
-
RESET# should be asserted after PERST#
t
off2
2ms
10ms
-
FCPO# should be asserted after RESET#
t
pd
10ms
100ms
-
+3.3V power supply goes down time. If power supply is
always on, it can be ignored
Module Reset
The L860 module can reset to its initial status by pulling down the RESET# signal for more than 2ms (10ms
is recommended), and module will restart after RESET# signal is released. When customer executes
RESET# function, the PMU remains its power inside the module. The recommended circuit design is
shown in the Figure 3-7:
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