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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MEC1322 датащи(PDF) 237 Page - Microchip Technology |
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MEC1322 датащи(HTML) 237 Page - Microchip Technology |
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237 / 456 page  2014 - 2015 Microchip Technology Inc. DS00001719D-page 237 MEC1322 19.11.10 YEAR REGISTER 19.11.11 REGISTER A Offset 09h Bits Description Type Default Reset Event 7:0 YEAR Displays the number of the year in the current century, in the range 0 (year 2000) through 99 (year 2099). 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 0Ah Bits Description Type Default Reset Event 7 UPDATE_IN_PROGRESS ‘0’ indicates that the Time and Date registers are stable and will not be altered by hardware soon. ‘1’ indicates that a hardware update of the Time and Date registers may be in progress, and those registers should not be accessed by the host program. This bit is set to ‘1’ at a point 488us (16 cycles of the 32K clock) before the update occurs, and is cleared immediately after the update. See also the Update-Ended Interrupt, which provides more useful status. R0b RTC_R ST 6:4 DIVISION_CHAIN_SELECT This field provides general control for the Time and Date register updating logic. 11xb=Halt counting. The next time that 010b is written, updates will begin 500ms later. 010b=Required setting for normal operation. It is also necessary to set the Block Enable bit in the RTC Control Register to ‘1’ for counting to begin 000b=Reserved. This field should be initialized to another value before Enabling the block in the RTC Control Register Other values Reserved R/W 000b RTC_R ST 3:0 RATE_SELECT This field selects the rate of the Periodic Interrupt source. See Table 19-8 R/W 0h RTC_R ST TABLE 19-8: REGISTER A FIELD RS: PERIODIC INTERRUPT SETTINGS RS (hex) Interrupt Period 0 Never Triggered 1 3.90625 ms 2 7.8125 ms 3 122.070 us 4 244.141 us 5 488.281 us 6 976.5625 us |
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