RSMRST# Signal in CQ40 in Both AC and Battery Mode
RSMRST# Signal in CQ40 in Both AC and Battery Mode
RSMRST#
When +3valwp and +5valwp always power generated
standby IC (TPS51125) output or release R_EC_RSMRST#( this is power good
signal which is connect to ICH9 (Southbridge)D22 point) signal this signal is
connected to EC_RSMRST# through
R354 resistance .So there is difference between AC Mode and Battery Mode:
On off Operation in AC Mode
On off Operation in Battery Mode
On off Operation in AC Mode
In AC Mode adaptor is connected and system get power from adaptor pin (VIN Signal) .When VIN is input from DC jack it Power lm393 PU102 and it release ACIN from Pin no.7.
After making always supplies this IC release Power good signal it connected with EC_RSMRST# which make RSMRST# signal disable(when # signals has 3.3v it counts as disable) for further Operation.
On off Operation in Battery Mode
In this Mode power for system is Applied by Battery through
discharging Mosfet PQ102 .When Power
Button is Pressed by user it low (0v) on/offbtn on pin no.32 of EC. when on/offbtn
is pressed EC Triggered PWRBTN_OUT# from pin no.117.
PWRBTN_OUT# go to ICH9 to intimate system to resume (release pause btn RSMRST#).ICH9 disable the RSMRST# (3.3v) signal and I/o release the EC_ON which power the gate of PQ307 then its drain is short to ground. Drain of PQ307 is connected with PQ305 and PQ306 gate pins.
When gates of PQ305 and PQ306 have no power by this pull
high the ENTRIP1 and ENTRIP2. when ENTRIP1 and ENTRIP2 high Standby IC (tps51125) start making
+3valw
and +5valw
supplies. After making always supplies this IC release Power good signal it
connected with EC_RSMRST# which make RSMRST# signal disable(when #
signals has 3.3v it counts as disable) for further Operation
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