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CY14B104MA-ZS20XI Datasheet(PDF) 11 Page - Cypress Semiconductor

Part # CY14B104MA-ZS20XI
Description  4 Mbit (512K x 8/256K x 16) nvSRAM with Real-Time-Clock
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY14B104MA-ZS20XI Datasheet(HTML) 11 Page - Cypress Semiconductor

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PRELIMINARY
CY14B104KA, CY14B104MA
Document #: 001-07103 Rev. *J
Page 11 of 31
Table 4. Register Map Detail
Register
Description
CY14B104KA CY14B104MA
0x7FFFF
0x3FFFF
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.
0x7FFFE
0x3FFFE
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.
0x7FFFD
0x3FFFD
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.
0x7FFFC
0x3FFFC
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.
0x7FFFB
0x3FFFB
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.
0x7FFFA
0x3FFFA
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.
0x7FFF9
0x3FFF9
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.
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