Name: Fibocom L850-GL Series
Brand: Fibocom
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FIBOCOM L850-GL Series Hardware Guide Page 28 of 59

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:

Figure 3-7 Recommended design for reset circuit

There are two reset control timings as below:

 Reset timing 1

in Figure 3-8, PMU of module internal always on in reset sequence, recommend

using in FW upgrade and module recovery;

 Reset timing 2

in Figure 3-9, PMU of module internal will be off in reset sequence (including whole

power off and power on sequence, t

can refer section 3.3.2), recommend using in system warm

boot.

+3.3V

PERST#

RESET#

Module State

InitializationActivation

FCPO#

typical 10s

Baseband reset Activation

toff2

Figure 3-8 Reset timing 1

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Fibocom L850-GL Series Specifications

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