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Service Modes, Error Codes, and Fault Finding
EN 25Q549.2E LA 5.
2009-May-08
Figure 5-10 “Semi Stand-by” to “Stand-by” flowchart
transfer Wake up reasons to the Stand by µP.
Stand by
Semi Stand by
action holder: MIPS
autonomous action
action holder: St-by
Disable all supply related protections and switch off
the DC/DC converters (ENABLE-3V3)
Switch OFF all supplies by switching HIGH the
Standby I/O line
Switch AVC system in reset state
Switch reset-PNX5100 LOW
Switch reset-ST7100 LOW
Switch Reset-Ethernet LOW
Important remark:
release reset audio 10 sec after
entering standby to save power
Wait 5ms
Wait 10ms
Switch the NVM reset line HIGH
Switch het WP-Nandflash LOW
Delay transition until ramping down of ambient light is
finished. *)
If ambientlight functionality was used in semi -standby
(lampadaire mode), switch off ambient light
*) If this is not performed and the set is
switched to standby when the switch off of
the ambilights is still ongoing, the lights will
switch off abruptly when the supply is cut.
Switch Memories to self-refresh (this creates a more
stable condition when switching off the power).
I_17660_130.eps
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