Register map detail – Cypress CY14B256K User Manual
Page 12
CY14B256K
Document Number: 001-06431 Rev. *H
Page 12 of 28
Table 4. Register Map Detail
0x7FFF
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.
0x7FFE
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.
0x7FFD
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.
0x7FFC
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.
0x7FFB
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.
0x7FFA
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.
0x7FF9
Time Keeping - Seconds
D7
D6
D5
D4
D3
D2
D1
D0
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.