User`s guide

Rev. 1.10 46 November 14, 2014 Rev. 1.10 47 November 14, 2014
HT66FW2230
Wireless Charger A/D Flash 8-Bit MCU
Watchdog Time-out Reset during SLEEP or IDLE Mode
TheWatchdogtime-outResetduringSLEEPorIDLEModeisalittledifferentfromotherkinds
ofreset.MostoftheconditionsremainunchangedexceptthattheProgramCounterandtheStack
Pointerwillbeclearedto“0”andtheTOagwillbesetto“1”.RefertotheA.C.Characteristicsfor
t
SST
details.
 
 
    
Note:Thet
SST
is15~16clockcyclesifthesystemclocksourceisprovidedbyHIRC.
Thet
SST
is128clockcyclesifthesystemclocksourceisprovidedbytheHXT.
Thet
SST
is1~2clockfortheLIRC.
WDT Time-out Reset during SLEEP or IDLE Timing Chart
WDTC Register Software Reset
AWDTCsoftwareresetwillbegeneratedwhenavalueotherthan“10101”or“01010”,existinthe
highestvebitsoftheWDTCregister.TheWRFbitintheRSTFCregisterwillbesethighwhen
thisoccurs,thusindicatingthegenerationofaWDTCsoftwarereset.
• WDTC Register
Bit 7 6 5 4 3 2 1 0
Name WE4 WE3 WE2 WE1 WE0 WS2 WS1 WS0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
POR 0 1 0 1 0 0 1 1
Bit7~3 WE4 ~ WE0:WDTfunctionsoftwarecontrol
10101or01010:Enabled
Othervalues:ResetMCU(resetwillbeactiveafter2~3LIRCclockfordebouncetime)
IftheMCUresetandit’scausedbyWE[4:0]inWDTCsoftwarereset,theWRFag
inRSTFCregisterwillbesetafterreset.
Bit2~0 WS2 ~ WS0:WDTTime-outperiodselection
Describedelsewhere