CY14B108K_12 Datasheet, PDF (14/34 Pages) Cypress Semiconductor – 8-Mbit (1024 K × 8/512 K × 16) nvSRAM with Real Time Clock

CY14B108K, CY14B108M
Table 3. RTC Register Map ^[10]
Register
CY14B108K CY14B108M D7
0xFFFFF
0x7FFFF
0xFFFFE
0x7FFFE
0
0xFFFFD
0xFFFFC
0xFFFFB
0xFFFFA
0xFFFF9
0xFFFF8
0xFFFF7
0xFFFF6
0x7FFFD
0x7FFFC
0x7FFFB
0x7FFFA
0x7FFF9
0x7FFF8
0x7FFF7
0x7FFF6
0
0
0
0
0
OSCEN
(0)
WDS
(0)
WIE (0)
0xFFFF5
0x7FFF5
M (1)
BCD Format Data ^[11]
D6
D5
D4
D3
D2
D1 D0
10s years
Years
0
0
10s
months
Months
0
10s day of month
Day of month
0
0
0
0
Day of week
0
10s hours
Hours
10s minutes
Minutes
10s seconds
Seconds
0
Cal sign
(0)
Calibration (00000)
WDW (0)
WDT (000000)
AIE (0) PFE (0)
0
H/L P/L (0) 0
0
(1)
0
10s alarm date
Alarm day
0xFFFF4
0xFFFF3
0x7FFF4
0x7FFF3
M (1)
M (1)
0
10s alarm hours
10s alarm minutes
Alarm hours
Alarm minutes
0xFFFF2
0x7FFF2
M (1)
10s alarm seconds
Alarm, seconds
0xFFFF1
0xFFFF0
0x7FFF1
0x7FFF0
WDF
10s centuries
Centuries
AF
PF OSCF^[13] 0 CAL (0) W (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
[12]
Watchdog ^[12]
Interrupts ^[12]
Alarm, day of month:
01–31
Alarm, hours: 00–23
Alarm, minutes:
00–59
Alarm, seconds:
00–59
Centuries: 00–99
Flags ^[12]
Notes
10. Upper Byte D₁₅-D₈ (CY14B108M) of RTC registers are reserved for future use.
11. ( ) designates values shipped from the factory.
12. This is a binary value, not a BCD value.
13. When the user resets OSCF flag bit, the flags register will be updated after t_RTCp time.
Document Number: 001-47378 Rev. *I
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