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Service Modes, Error Codes, and Fault Finding <strong>LC7.1E</strong> PA 5. EN 21<br />
Power Down INT:<br />
AC OFF or Transient INT<br />
Start<br />
Avoid false trigger<br />
No<br />
Poll the Power Down<br />
INT for 5 times<br />
Yes<br />
End<br />
Mute Audio & VIdeo<br />
Notes:<br />
1. Power Down INT will be based on fall edge triggering<br />
2. +3V3STBY will stay for 15ms, software must perform<br />
WriteProtect for NVM within 15ms.<br />
WriteProtect for NVM<br />
STANDBYn = LOW<br />
Wait 5000 ms<br />
Re-start: Start up<br />
End<br />
DC_PROT INT<br />
Start<br />
Avoid false trigger<br />
No<br />
is DC_PROT = LOW<br />
for 3 sec?<br />
Yes<br />
End<br />
Mute Audio & VIdeo<br />
Error 1<br />
[Protection]<br />
Log Error Code<br />
WriteProtect for NVM<br />
STANDBYn = LOW<br />
End<br />
G_16860_072.eps<br />
220207<br />
Figure 5-9 Power Down & DC_PROT flowchart
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