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PT7C4337AUE Datasheet(PDF) 11 Page - Pericom Semiconductor Corporation |
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PT7C4337AUE Datasheet(HTML) 11 Page - Pericom Semiconductor Corporation |
11 / 25 page ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2014-10-0002 PT0480-2 11/03/14 11 PT7C4337A/4337AC Real-time Clock Module (I 2C Bus) A2F Alarm 2 Flag. A1F Data Description Read / Write 0 The time do not match the alarm 2 registers. Default Read 1 Indicates that the time matched the alarm 1 registers. This flag can be used to generate an interrupt on either INTA or SQW/INTB depending on the status of the INTCN bit. If the INTCN = 0 and A2F = 1 (and A2IE = 1), the INTA pin goes low. If the INTCN = 1 and A2F = 1 (and A2IE = 1), the SQW/INTB pin goes low. A2F is cleared when written to logic 0. Attempting to write to logic 1 leaves the value unchanged. Time Counter Time digit display (in BCD code): Second digits: Range from 00 to 59 and carried to minute digits when incremented from 59 to 00. Minute digits: Range from 00 to 59 and carried to hour digits when incremented from 59 to 00. Hour digits: See description on the /12, 24 bit. Carried to day and day-of-the-week digits when incremented from 11 p.m. to 12 a.m. or 23 to 00. Addr. (hex) Description D7 D6 D5 D4 D3 D2 D1 D0 00 Seconds 0 S40 S20 S10 S8 S4 S2 S1 (default) 0 0 0 0 0 0 0 0 01 Minutes 0 M40 M20 M10 M8 M4 M2 M1 (default) 0 0 0 0 0 0 0 0 02 Hours 0 12, /24 H20 or P,/A H10 H8 H4 H2 H1 (default) 0 0 0 0 0 0 0 0 Note: Any registered imaginary time should be replaced with correct time, otherwise it will cause the clock counter malfunction. 12, /24 bit This bit is used to select between 12-hour clock system and 24-hour clock system. 12, /24 Data Description Read / Write 0 24-hour system 1 12-hour system |
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