Cypress STK17T88 RTC Register Map, Register BCD Format Data Function / Range, Oscen, Wds Wdw Wdt

STK17T88

RTC Register Map

Register			BCD Format Data						Function / Range
	D7	D6	D5	D4	D3	D2	D1	D0
0x7FFF		10s Years				Years			Years: 00-99
0x7FFE	0	0	0	10s		Months			Months: 01-12
				Months
0x7FFD	0	0	10s Day of Month			Day of Month			Day of Month: 01-31
0x7FFC	0	0	0	0	0	Day of Week			Day of week: 01-07
0x7FFB	0	0	10s Hours			Hours			Hours: 00-23
0x7FFA	0		10s Minutes			Minutes			Minutes: 00-59
0x7FF9	0	10s Seconds				Seconds			Seconds: 00-59
0x7FF8	OSCEN	0	Cal		Calibration [00000]				Calibration values*
	[0]		Sign
0x7FF7	WDS	WDW			WDT				Watchdog*
0x7FF6	WIE[0]	AIE[0]	PFE[0]	0	H/L [1]	P/L [0]	0	0	Interrupts*
0x7FF5	M	0	10s Alarm Date			Alarm Day			Alarm, Day of Month: 01-31
0x7FF4	M	0	10s Alarm Hours			Alarm Hours			Alarm, hours: 00-23
0x7FF3	M	10 Alarm Minutes				Alarm Minutes			Alarm, minutes: 00-59
0x7FF2	M	10 Alarm Seconds				Alarm Seconds			Alarm, seconds: 00-59
0x7FF1		10s Centuries				Centuries			Centuries: 00-99
0x7FF0	WDF	AF	PF	OSCF	0	CAL[0]	W[0]	R[0]	Flags*

*A binary value, not a BCD value.

0 - Not implemented, reserved for future use.

Default Settings of nonvolatile Calibration and Interrupt registers from factory Calibration Register=00h

Interrupt Register=00h

The User should configure to the desired value at startup or during operation and the value is then retained during a power failure. [ ] designates values shipped from the factory. See Stopping and Starting the RTC Oscillator on page 14.

Document Number: 001-52040 Rev. *A Page 17 of 22

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