Holtek HT66F0175 - I � C Time-O�T Control

Rev. 1.50 144 August 28, 2017 Rev. 1.50 145 August 28, 2017
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
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I
2
C Bus ISR Flow Chart
I
2
C Time-out Control
InordertoreducetheI
2
Clockupproblemduetoreceptionoferroneousclocksources,atime-out
functionisprovided.IftheclocksourceconnectedtotheI
2
Cbusisnotreceivedforawhile,thenthe
I
2
Ccircuitryandregisterswillberesetafteracertaintime-outperiod.Thetime-outcounterstartsto
countonanI
2
Cbus“START”&“addressmatch”condition,andisclearedbyanSCLfallingedge.
BeforethenextSCLfallingedgearrives,ifthetimeelapsedisgreaterthanthetime-outperiod
speciedbytheSIMTOCregister,thenatime-outconditionwilloccur.Thetime-outfunctionwill
stopwhenanI
2
C“STOP”conditionoccurs.