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FM3808-70-T Arkusz danych(PDF) 4 Page - Ramtron International Corporation

Numer części FM3808-70-T
Szczegółowy opis  256Kb Bytewide FRAM w/ Real-Time Clock
Download  27 Pages
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Producent  RAMTRON [Ramtron International Corporation]
Strona internetowa  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM3808-70-T Arkusz danych(HTML) 4 Page - Ramtron International Corporation

  FM3808-70-T Datasheet HTML 1Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 2Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 3Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 4Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 5Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 6Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 7Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 8Page - Ramtron International Corporation FM3808-70-T Datasheet HTML 9Page - Ramtron International Corporation Next Button
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FM3808
Rev. 1.3 (EOL)
Feb. 2006
Page 4 of 27
Table 1. Register Map
Address
Description
7FFFh
Timekeeping – Years
D7
D6
D5
D4
D3
D2
D1
D0
10 year.3
10 year.2
10 year.1
10 year.0
Year.3
Year.2
Year.1
Year.0
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.
7FFEh
Timekeeping – Months
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
10 Month
Month.3
Month.2
Month.1
Month.0
Contains the BCD digits for 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.
7FFDh
Timekeeping – Date of the month
D7
D6
D5
D4
D3
D2
D1
D0
0
0
10 date.1
10 date.0
Date.3
Date.2
Date.1
Date.0
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.
7FFCh
Timekeeping – Day of the week
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
Day.2
Day.1
Day.0
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.
7FFBh
Timekeeping – Hours
D7
D6
D5
D4
D3
D2
D1
D0
0
0
10 hours.1
10 hours.0
Hours.3
Hours2
Hours.1
Hours.0
Contains the BCD value of hours in 24-hour format. Lower nibble 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.
7FFAh
Timekeeping – Minutes
D7
D6
D5
D4
D3
D2
D1
D0
0
10 min.2
10 min.1
10 min.0
Min.3
Min.2
Min.1
Min.0
Contains the BCD value of minutes. Lower nibble contains the lower digit and operates from 0 to 9; upper
nibble contains the upper minutes digit and operates from 0 to 5. The range for the register is 0-59.
7FF9h
Timekeeping – Seconds
D7
D6
D5
D4
D3
D2
D1
D0
0
10 sec.2
10 sec.1
10 sec.0
Seconds.3
Seconds.2
Seconds.1
Seconds.0
Contains the BCD value of seconds. Lower nibble contains the lower digit and operates from 0 to 9; upper
nibble contains the upper digit and operates from 0 to 5. The range for the register is 0-59.
Address
Description
7FF8h
Control-Nonvolatile
D7
D6
D5
D4
D3
D2
D1
D0
OSCEN
Reserved
Reserved
CALS
CAL.3
CAL.2
CAL.1
CAL.0


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