CY14C101PA_12 Datasheet, PDF (27/43 Pages) Cypress Semiconductor – 1-Mbit (128 K × 8) Serial (SPI) nvSRAM with Real Time Clock

CY14C101PA
CY14B101PA
CY14E101PA
Table 12. Register Map Detail
0x0F
0x0E
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.
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.
Time Keeping - Date
0x0D
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.
Time Keeping - Day
D7
D6
D5
D4
D3
D2
D1
D0
0x0C
0x0B
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.
Time Keeping - Hours
D7
D6
D5
D4
D3
D2
D1
D0
0
0
10s hours
Hours
0x0A
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.
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.
Time Keeping - Seconds
D7
D6
D5
D4
D3
D2
D1
D0
0x09
0
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.
Calibration/Control
0X08
D7
D6
D5
D4
D3
D2
D1
D0
OSCEN
0
Calibration
Calibration
sign
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 Determines if the calibration adjustment is applied as an addition (1) to or as a subtraction (0) from the time-base.
Sign
Calibration These five bits control the calibration of the clock.
Document Number: 001-54392 Rev. *J
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