71M6521DE Datasheet, PDF (78/101 Pages) Teridian Semiconductor Corporation – Energy Meter IC

WD_RST
WD_OVF
WE
71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
SFRE8[7] 0 0 W WD timer bit: Possible operations to this bit are:
Read: Gets the status of the flag IE_PLLFALL
Write 0: Clears the flag
Write 1:.Resets the WDT
2002[2]
0 0 R/W The WD overflow status bit. This bit is set when the WD timer
overflows. It is powered by the non-volatile supply and at bootup
will indicate if the part is recovering from a WD overflow or a power
fault. This bit should be cleared by the MPU on bootup. It is also
automatically cleared when RESET is high.
201F7:0] -- -- W Write operations on the RTC registers must be preceded by a write
operation to WE.
Page: 78 of 101
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