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MEC1322 датащи(PDF) 234 Page - Microchip Technology |
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MEC1322 датащи(HTML) 234 Page - Microchip Technology |
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234 / 456 page ![]() MEC1322 DS00001719D-page 234 2014 - 2015 Microchip Technology Inc. 19.11.1 SECONDS REGISTER 19.11.2 SECONDS ALARM REGISTER 09h Year Register 0Ah Register A 0Bh Register B 0Ch Register C 0Dh Register D 0Eh (reserved) 0Fh (reserved) 10h RTC Control Register 14h Week Alarm Register 18h Daylight Savings Forward Register 1Ch Daylight Savings Backward Register 20h MCHP Reserved Note: This extended register set occupies offsets that have historically been used as CMOS RAM. Code ported to use this block should be examined to ensure that it does not assume that RAM exists in this block. Offset 00h Bits Description Type Default Reset Event 7:0 SECONDS Displays the number of seconds past the current minute, in the range 0--59. Presentation may be selected as binary or BCD, depending on the DM bit in Register B. Values written must also use the format defined by the current setting of the DM bit. R/W 00h RTC_R ST Offset 01h Bits Description Type Default Reset Event 7:0 SECONDS_ALARM Holds a match value, compared against the Seconds Register to trig- ger the Alarm event. Values written to this register must use the for- mat defined by the current setting of the DM bit in Register B. A value of 11xxxxxxb written to this register makes it don’t-care (always matching). R/W 00h RTC_R ST TABLE 19-7: RUNTIME REGISTER SUMMARY (CONTINUED) Offset Register Name (Mnemonic) |
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