전자부품 데이터시트 검색엔진 |
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FM3130-G 데이터시트(PDF) 10 Page - Ramtron International Corporation |
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FM3130-G 데이터시트(HTML) 10 Page - Ramtron International Corporation |
10 / 22 page FM3130 Integrated RTC/Alarm with 64Kb FRAM Rev. 1.0 Sept. 2006 Page 10 of 22 09h Alarm – Seconds D7 D6 D5 D4 D3 D2 D1 D0 M 10 sec.2 10 sec.1 10 sec.0 Seconds.3 Seconds.2 Seconds.1 Seconds.0 Contains the alarm value for the seconds and the mask bit to select or deselect the Seconds value. /M Match: Setting this bit to a ‘0’ causes the Seconds value to be used in the alarm match logic. Setting this bit to a ‘1’ causes the match circuit to ignore the Seconds value. Battery-backed, read/write. 08h 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. Battery-backed, read/write. 07h 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. Battery- backed, read/write. 06h 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. Battery-backed, read/write. 05h 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. Battery-backed, read/write. 04h 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. Battery-backed, read/write. 03h 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. Battery-backed, read/write. 02h 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. Battery-backed, read/write. 01h CAL/Control D7 D6 D5 D4 D3 D2 D1 D0 OSCEN - CALS CAL.4 CAL.3 CAL.2 CAL.1 CAL.0 /OSCEN Oscillator Enable. When set to 1, the oscillator is halted. When set to 0, the oscillator runs. Disabling the oscillator can save battery power during storage. On an initial power-up of VDD with or without VBAK, this bit is internally set to 1, which turns off the oscillator. Battery-backed, read/write. |
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