CY14B256KA_12 Datasheet, PDF (11/27 Pages) Cypress Semiconductor – 256-Kbit (32 K × 8) nvSRAM with Real Time Clock

CY14B256KA
Table 3. RTC Register Map ^{[6, 7]}
Register
BCD Format Data ^[6]
CY14B256KA
D7
D6
D5
D4
D3
D2
D1
D0
0x7FFF
10s years
Years
0x7FFE
0
0
0
10s
months
Months
0x7FFD
0
0 10s day of month
Day of month
0x7FFC
0
0
0
0
0
Day of week
0x7FFB
0
0
10s hours
Hours
0x7FFA
0
10s minutes
Minutes
0x7FF9
0
10s seconds
Seconds
0x7FF8
OSCEN
(0)
0
Cal
sign (0)
Calibration (00000)
0x7FF7
WDS (0) WDW
(0)
WDT (000000)
0x7FF6
WIE (0) AIE (0) PFE (0) 0
H/L (1) P/L (0) 0
0
0x7FF5
M (1)
0
10s alarm date
Alarm day
0x7FF4
M (1)
0
10s alarm hours
Alarm hours
0x7FF3
M (1)
10s alarm minutes
Alarm minutes
0x7FF2
M (1)
10s alarm seconds
Alarm, seconds
0x7FF1
0x7FF0
10s centuries
WDF
AF
PF OSCF ^[9]
0
Centuries
CAL W (0)
(0)
R (0)
Function/Range
Years: 00–99
Months: 01–12
Day of month: 01–31
Day of week: 01–07
Hours: 00–23
Minutes: 00–59
Seconds: 00–59
Calibration values ^[8]
Watchdog ^[8]
Interrupts ^[8]
Alarm, Day of month: 01–31
Alarm, hours: 00–23
Alarm, minutes: 00–59
Alarm, seconds: 00–59
Centuries: 00–99
Flags ^[8]
Notes
6. The unused bits of RTC registers are reserved for future use and should be set to ‘0’.
7. ( ) designates values shipped from the factory.
8. This is a binary value, not a BCD value.
9. When the user resets OSCF flag bit, the flags register will be updated after t_RTCp time.
Document Number: 001-55720 Rev. *G
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