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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF2129AT датащи(PDF) 28 Page - NXP Semiconductors |
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PCF2129AT датащи(HTML) 28 Page - NXP Semiconductors |
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28 / 86 page  PCF2129 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 7 — 19 December 2014 28 of 86 NXP Semiconductors PCF2129 Accurate RTC with integrated quartz crystal for industrial applications 8.8.5 Register Weekdays Although the association of the weekdays counter to the actual weekday is arbitrary, the PCF2129 assumes that Sunday is 000 and Monday is 001 for the purpose of determining the increment for calendar weeks. [1] Definition may be reassigned by the user. Table 30. Weekdays - weekdays register (address 07h) bit allocation Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and unchanged by subsequent resets. Bit 7 6 5 4 3 2 1 0 Symbol - - - - - WEEKDAYS (0 to 6) Reset value --- -- X X X Table 31. Weekdays - weekdays register (address 07h) bit description Bit positions labeled as - are not implemented and return 0 when read. Bits labeled as X are undefined at power-on and unchanged by subsequent resets. Bit Symbol Value Description 7 to 3 - - unused 2 to 0 WEEKDAYS 0 to 6 actual weekday value, see Table 32 Table 32. Weekday assignments Day[1] Bit 2 1 0 Sunday 0 0 0 Monday 0 0 1 Tuesday 0 1 0 Wednesday 0 1 1 Thursday 1 0 0 Friday 1 0 1 Saturday 110 |
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