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FM3130-G Scheda tecnica(PDF) 9 Page - Ramtron International Corporation |
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FM3130-G Scheda tecnica(HTML) 9 Page - Ramtron International Corporation |
9 / 22 page FM3130 Integrated RTC/Alarm with 64Kb FRAM Rev. 1.0 Sept. 2006 Page 9 of 22 Register Description Address Description 0Eh Alarm & WP Control D7 D6 D5 D4 D3 D2 D1 D0 AL/SW F1 F0 WP1 WP0 VBC FC TST AL/SW Alarm/Square Wave Select: When set to 1, the alarm controls the ACS pin as well as the AF flag. When set to 0, the selected Square Wave Freq will be driven on the ACS pin, and an alarm match only sets the AF flag. Battery- backed, read/write. F(1:0) Square Wave Freq Select: These bits select the frequency on the ACS pin when the CAL and AL/SW bits are both 0. Battery-backed. Setting F(1:0) Setting F(1:0) 1 Hz 00 (default) 4096 Hz 10 512 Hz 01 32768 Hz 11 WP1,WP0 Write Protect. These bits control the write protection of the memory array. Battery-backed, read/write. Write-Protect addresses WP1 WP0 None 0 0 Bottom 1/4 0 1 Bottom 1/2 1 0 Full array 1 1 VBC VBAK Charger Control: Setting VBC to 1 (and FC=0) causes approx. 80 µA (1mA if FC=1) trickle charge current to be supplied on VBAK. Clearing VBC to 0 disables the charge current. Battery-backed, read/write. FC Fast Charge: Setting FC to 1 (and VBC=1) causes approx. 1mA trickle charge current to be supplied on VBAK. Clearing VBC to 0 disables the charge current. Battery-backed, read/write. TST Invokes factory test mode. Users should always set this bit to 0. 0Dh Alarm – Month D7 D6 D5 D4 D3 D2 D1 D0 M 0 0 10 Month Month.3 Month.2 Month.1 Month.0 Contains the alarm value for the month and the mask bit to select or deselect the Month value. /M Match. Setting this bit to a ‘0’ causes the Month value to be used in the alarm match logic. Setting this bit to a ‘1’ causes the match circuit to ignore the Month value. Battery-backed, read/write. 0Ch Alarm – Date D7 D6 D5 D4 D3 D2 D1 D0 M 0 10 date.1 10 date.0 Date.3 Date.2 Date.1 Date.0 Contains the alarm value for the date and the mask bit to select or deselect the Date value. /M Match: Setting this bit to a ‘0’ causes the Date value to be used in the alarm match logic. Setting this bit to a ‘1’ causes the match circuit to ignore the Date value. Battery-backed, read/write. 0Bh Alarm – Hours D7 D6 D5 D4 D3 D2 D1 D0 M 0 10 hours.1 10 hours.0 Hours.3 Hours2 Hours.1 Hours.0 Contains the alarm value for the hours and the mask bit to select or deselect the Hours value. /M Match: Setting this bit to a ‘0’ causes the Hours value to be used in the alarm match logic. Setting this bit to a ‘1’ causes the match circuit to ignore the Hours value. Battery-backed, read/write. 0Ah Alarm – Minutes D7 D6 D5 D4 D3 D2 D1 D0 M 10 min.2 10 min.1 10 min.0 Min.3 Min.2 Min.1 Min.0 Contains the alarm value for the minutes and the mask bit to select or deselect the Minutes value /M Match: Setting this bit to a ‘0’ causes the Minutes value to be used in the alarm match logic. Setting this bit to a ‘1’ causes the match circuit to ignore the Minutes value. Battery-backed, read/write. |
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