Specifications

STK17TA8
Document #: 001-52039 Rev. *C Page 18 of 24
RTC Register
* 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 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 15.
Register
BCD Format Data
Function / Range
D7 D6 D5 D4 D3 D2 D1 D0
0x1FFFF 10s Years Years Years: 00-99
0x1FFFE 0 0 0 10s
Months
Months Months: 01-12
0x1FFFD 0 0 10s Day of
Month
Day of Month Day of Month: 01-31
0x1FFFC 0 0 0 0 0 Day of Week Day of week: 01-07
0x1FFFB 0 0 10s Hours Hours Hours: 00-23
0x1FFFA 0 10s Minutes Minutes Minutes: 00-59
0x1FFF9 0 10s Seconds Seconds Seconds: 00-59
0x1FFF8 OSCEN
[0]
0Cal
Sign
Calibration[00000] Calibration values*
0x1FFF7 WDS WDW WDT Watchdog*
0x1FFF6 WIE [0] AIE [0] PFE
[0]
0H/L
[1]
P/L [0] 0 0 Interrupts*
0x1FFF5 M 0 10s Alarm Date Alarm Day Alarm, Day of Month: 01-31
0x1FFF4 M 0 10s Alarm Hours Alarm Hours Alarm, hours: 00-23
0x1FFF3 M 10 Alarm Minutes Alarm Minutes Alarm, minutes: 00-59
0x1FFF2 M 10 Alarm Seconds Alarm Seconds Alarm, seconds: 00-59
0x1FFF1 10s Centuries Centuries Centuries: 00-99
0x1FFF0 WDF AF PF OSCF 0 CAL[0] W[0] R[0] Flags*
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Not Recommended for New Designs