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DS1685E-3+ Datasheet(PDF) 9 Page - Maxim Integrated Products |
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DS1685E-3+ Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 34 page DS1685/DS1687 3V/5V Real-Time Clocks 9 of 34 “don’t care” codes in all three time alarm bytes create an interrupt every second. The three time-alarm bytes can be used with the date alarm as described in the Wake-Up/Kickstart section. The century counter is discussed later in this text. All registers can be directly written or read except for the following: 1) Registers C and D are read-only. 2) Bit 7 of Register A is read-only. 3) Bit 7 of the seconds byte is read-only. Table 2A. Time, Calendar, and Alarm Data Modes—BCD Mode (DM = 0) ADDRESS BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 FUNCTION RANGE 00H 0 10 Seconds Seconds Seconds 00-59 01H 0 10 Seconds Seconds Seconds Alarm 00-59 02H 0 10 Minutes Minutes Minutes 00-59 03H 0 10 Minutes Minutes Minutes Alarm 00-59 AM/PM 0 10 Hour 04H 0 0 10 Hour Hours Hours 1-12 +AM/PM 00-23 AM/PM 0 10 Hour 05H 0 0 10 Hr Hours Hours Alarm 1-12 +AM/PM 00-23 06H 0 0 0 0 0 Day Day 01-07 07H 0 0 10 Date Date Date 01-31 08H 0 0 0 10 Month Month Month 01-12 09H 10 Year Year Year 00-99 0AH UIP DV2 DV1 DV0 RS3 RS2 RS1 RS0 Control 0BH SET PIE AIE UIE SQWE DM 24/12 DSE Control 0CH IRQF PF AF UF 0 0 0 0 Control 0DH VRT 0 0 0 0 0 0 0 Control 48H Century Bank 1 Century 00-99 49H 10 Date Date Bank 1 Date Alarm 01-31 X = Read/Write Bit. Note 1: Unless otherwise specified, the state of the registers is not defined when power is first applied. Note 2: Except for the seconds register, 0 bits in the time and date registers can be written to a 1, but may be modified when the clock updates. 0 bits should always be written to 0 except for alarm mask bits. |
Similar Part No. - DS1685E-3+ |
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Similar Description - DS1685E-3+ |
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