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BQ3285ESTR Datasheet(PDF) 9 Page - Texas Instruments |
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BQ3285ESTR Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 36 page  Register B Register B enables: n Update cycle transfer operation n Square-wave output n Interrupt events n Daylight saving adjustment Register B selects: n Clock and calendar data formats All bits of register B are read/write. DSE - Daylight Saving Enable This bit enables daylight-saving time adjustments when written to 1: n On the last Sunday in October, the first time the bq3285E/L increments past 1:59:59 AM, the time falls back to 1:00:00 AM. n On the first Sunday in April, the time springs forward from 2:00:00 AM to 3:00:00 AM. HF - Hour Format This bit selects the time-of-day and alarm hour format: 1 = 24-hour format 0 = 12-hour format DF - Data Format This bit selects the numeric format in which the time, alarm, and calendar bytes are represented: 1 = Binary 0 = BCD SQWE - Square-Wave Enable This bit enables the square-wave output: 1 = Enabled 0 = Disabled and held low UIE - Update Cycle Interrupt Enable This bit enables an interrupt request due to an update ended interrupt event: 1 = Enabled 0 = Disabled The UIE bit is automatically cleared when the UTI bit equals 1. AIE - Alarm Interrupt Enable This bit enables an interrupt request due to an alarm interrupt event: 1 = Enabled 0 = Disabled PIE - Periodic Interrupt Enable This bit enables an interrupt request due to a periodic interrupt event: 1 = Enabled 0 = Disabled 9 7654 3 210 ---- - -- DSE 7654 3 210 ---- - - HF - 7654 3 210 ---- - DF -- 7654 3 210 ---- SQWE - - - 7654 3 210 --- UIE - --- Register B Bits 7654 3 210 UTI PIE AIE UIE SQWE DF HF DSE 7654 3 210 -- AIE - - --- 7654 3 210 - PIE -- - --- bq3285E/L |
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