
Document Number: 001-55720 Rev. *H Page 12 of 28
Table 3. RTC Register Map
[6, 7]
Register BCD Format Data
[6]
Function/Range
CY14B256KA D7 D6 D5 D4 D3 D2 D1 D0
0x7FFF 10s years Years Years: 00–99
0x7FFE 0 0 0 10s
months
Months Months: 01–12
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)
0Cal
sign (0)
Calibration (00000) Calibration values
[8]
0x7FF7 WDS (0) WDW
(0)
WDT (000000) Watchdog
[8]
0x7FF6 WIE (0) AIE (0) PFE (0) 0 H/L (1) P/L (0) 0 0 Interrupts
[8]
0x7FF5 M (1) 0 10s alarm date Alarm day Alarm, Day of month: 01–31
0x7FF4 M (1) 0 10s alarm hours Alarm hours Alarm, hours: 00–23
0x7FF3 M (1) 10s alarm minutes Alarm minutes Alarm, minutes: 00–59
0x7FF2 M (1) 10s alarm seconds Alarm, seconds Alarm, seconds: 00–59
0x7FF1 10s centuries Centuries Centuries: 00–99
0x7FF0 WDF AF PF OSCF
[9]
0CAL
(0)
W (0) R (0) 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.
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