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L850-GL Hardware User Manual Page 28 of 54
3.3.3 Module Reset
The L850 module can reset to its initial status by pulling down the RESET# signal for more than 10ms
(30msis 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:
Host may keep FULL_CARD_POWER_OFF# high when system restarting, module reset timing
is shown in the Figure 3-8;
Host may assert FULL_CARD_POWER_OFF# high when system restarting, module reset
timing is shown in the Figure 3-9;
+3.3V
PERST#
RESET#
Module State
Restart
Activation
FULL_CARD_POWER_OFF#
typical 10s
PMU RESET Activation
t
res1
t
res2
Figure 3-8 Reset control timing1
st
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