CY14B101K Datasheet, PDF (10/24 Pages) Cypress Semiconductor – 1 Mbit (128K x 8) nvSRAM With Real-Time Clock

PRELIMINARY
CY14B101K
Table 3. RTC Register Map
BCD Format Data
Register
D7
D6
D5
D4
D3
D2
D1
D0
0x1FFFF
10s Years
Years
0x1FFFE 0
0
0
10s
Months
Months
0x1FFFD 0
0 10s Day of Month
Day Of Month
0x1FFFC 0
0
0
0
0
Day of week
0x1FFFB 0
0
10s Hours
Hours
0x1FFFA 0
10s Minutes
Minutes
0x1FFF9
10s Seconds
Seconds
0x1FFF8 OSCEN 0 Cal Sign
Calibration
0x1FFF7 WDS WDW
WDT
0x1FFF6 WIE AIE PFE
0
H/L
P/L
0
0
0x1FFF5 M
0 10s Alarm Date
Alarm Day
0x1FFF4 M
0 10s Alarm Hours
Alarm Hours
0x1FFF3 M
10 Alarm Minutes
Alarm Minutes
0x1FFF2 M
10 Alarm Minutes
Alarm, Seconds
0x1FFF1
10s Centuries
Centuries
0x1FFF0 WDF AF
PF OSCF
0
CAL
W
R
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 ^[4]
Watchdog ^[4]
Interrupts ^[4]
Alarm, Day of Month: 01 – 31
Alarm, Hours: 00 – 23
Alarm, Minutes: 00 – 59
Alarm, Seconds: 00 – 59
Centuries: 00 – 99
Flags ^[4]
Table 4. Register Map Detail
Time Keeping – Years
D7
0x1FFFF
D6
D5
10s Years
D4
D3
D2
D1
D0
Years
Contains the lower two BCD digits of the year. Lower nibble contains the value for years; upper nibble contains the
value for 10s of years. Each nibble operates from 0 to 9. The range for the register is 0 – 99.
Time Keeping – Months
D7
D6
D5
D4
D3
D2
D1
D0
0x1FFFE
0
0
0
10s Month
Months
Contains the BCD digits of the month. Lower nibble contains the lower digit and operates from 0 to 9; upper nibble
(one bit) contains the upper digit and operates from 0 to 1. The range for the register is 1 – 12.
Time Keeping – Date
D7
D6
D5
D4
D3
D2
D1
D0
0x1FFFD
0
0
10s Day of Month
Day of Month
Contains the BCD digits for the date of the month. Lower nibble contains the lower digit and operates from 0 to 9;
upper nibble contains the upper digit and operates from 0 to 3. The range for the register is 1 – 31. Leap years are
automatically adjusted for.
Time Keeping – Day
D7
D6
D5
0x1FFFC
0
0
0
D4
D3
D2
D1
D0
0
0
Day of Week
Lower nibble contains a value that correlates to day of the week. Day of the week is a ring counter that counts from
1 to 7 then returns to 1. The user must assign meaning to the day value, as the day is not integrated with the date.
Note
4. This register contains a binary, not BCD, value. .
Document #: 001-06401 Rev. *E
Page 10 of 24
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