Serial SPI nvSRAM Specification Sheet

PRELIMINARY
CY14B101P
Document #: 001-44109 Rev. *B Page 19 of 32
Table 10. Register Map Detail
0x0F
Time Keeping - Years
D7 D6 D5 D4 D3 D2 D1 D0
10s Years Years
Contains the lower two BCD digits of the year. Lower nibble (four bits) contains the value for years; upper nibble (four
bits) contains the value for 10s of years. Each nibble operates from 0 to 9. The range for the register is 0–99.
0x0E
Time Keeping - Months
D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 10s Month Months
Contains the BCD digits of the month. Lower nibble (four bits) 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.
0x0D
Time Keeping - Date
D7 D6 D5 D4 D3 D2 D1 D0
0 0 10s Day of Month Day of Month
Contains the BCD digits for the date of the month. Lower nibble (four bits) contains the lower digit and operates from 0
to 9; upper nibble (two bits) contains the 10s digit and operates from 0 to 3. The range for the register is 1–31. Leap
years are automatically adjusted for.
0x0C
Time Keeping - Day
D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 Day of Week
Lower nibble (three bits) 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, because the day is not integrated
with the date.
0x0B
Time Keeping - Hours
D7 D6 D5 D4 D3 D2 D1 D0
0 0 10s Hours Hours
Contains the BCD value of hours in 24 hour format. Lower nibble (four bits) contains the lower digit and operates from
0 to 9; upper nibble (two bits) contains the upper digit and operates from 0 to 2. The range for the register is 0–23.
0x0A
Time Keeping - Minutes
D7 D6 D5 D4 D3 D2 D1 D0
0 10s Minutes Minutes
Contains the BCD value of minutes. Lower nibble (four bits) contains the lower digit and operates from 0 to 9; upper
nibble (three bits) contains the upper minutes digit and operates from 0 to 5. The range for the register is 0–59.
0x09
Time Keeping - Seconds
D7 D6 D5 D4 D3 D2 D1 D0
10s Seconds Seconds
Contains the BCD value of seconds. Lower nibble (four bits) contains the lower digit and operates from 0 to 9; upper
nibble (three bits) contains the upper digit and operates from 0 to 5. The range for the register is 0–59.
0X08
Calibration/Control
D7 D6 D5 D4 D3 D2 D1 D0
OSCEN 0 Calibration
Sign
Calibration
OSCEN Oscillator Enable. When set to 1, the oscillator is stopped. When set to 0, the oscillator runs. Disabling the oscillator
saves battery or capacitor power during storage.
Calibration
Sign
Determines if the calibration adjustment is applied as an addition (1) to or as a subtraction (0) from the time-base.
Calibration These five bits control the calibration of the clock.
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