Module Reset - Fibocom L850-GL Series Hardware Manual

3.3.3

Module Reset

The L850 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:
There are two reset control timings as below:
Reset timing 1 st in Figure 3-8, PMU of module internal always on in reset sequence, recommend

using in FW upgrade and module recovery;
Reset timing 2 nd in Figure 3-9, PMU of module internal will be off in reset sequence (including whole

power off and power on sequence, t
boot.
+3.3V
FCPO#
RESET#
PERST#
Module State
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FIBOCOM L850-GL Series Hardware Guide
Figure 3-7 Recommended design for reset circuit
can refer
sd
t
off2
Activation Baseband reset
Figure 3-8 Reset timing 1
section 3.3.2), recommend using in system warm
typical 10s
Initialization
st
Activation
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