Service Modes, Error Codes, and Fault Finding
5.
Figure 5-7 “Semi Stand-by” to “Active” flowchart
H_16770_110.ep
s
290
3
07
Active
Semi Standby
action holder: AVC
autonomous action
action holder: St-by
Initialize audio and video
processing IC's and functions
according needed use case.
Assert RGB video blanking
and audio mute
Wait until previous on-state is left more than
2
seconds
ago. (to prevent LCD display problems)
Switch Audio-Reset low and wait 5ms
Restore dimming backlight feature, PWM output and unblank
the video.
Wait until valid and stable audio and video , corresponding to
the requested output is delivered by the AVC
AND
the
backlight PWM has been on for 1second.
The higher level requirement is that
audio and video should be demuted
without transient effects and that the
audio should be demuted maximum 1s
before or at the same time as the
unblanking of the video.
Release audio mute and wait 100ms before any other audio
handling is done (e.g. volume change)
wait 250ms (min. = 200ms)
Switch on LCD backlight
Switch off the dimming backlight feature and
make sure PWM output is set to 100%
Switch on the display by sending the
PanelConfig.PanelOn (I²C) command to the Pacific
Rewrite Pacific register 0x03 (output format) :
this command is sometimes not processed properly by the
Pacific at initialisation time , resending it here solves the issue.