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PCF2129AT データシート(PDF) 24 Page - NXP Semiconductors |
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PCF2129AT データシート(HTML) 24 Page - NXP Semiconductors |
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24 / 68 page  PCF2129A_1 © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 01 — 13 January 2010 24 of 68 NXP Semiconductors PCF2129A Integrated RTC, TCXO and quartz crystal 8.8.6 Register Months 8.8.7 Register Years Table 22. Months - months register (address 08h) bit description Bit Symbol Value Place value Description 7to5 - - - unused 4 MONTHS 0 to 1 ten’s place actual month coded in BCD format, see Table 23 3to0 0to9 unit place Table 23. Month assignments in BCD format Month Upper-digit (ten’s place) Digit (unit place) Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 January 0000 1 February 0001 0 March 0001 1 April 0010 0 May 0010 1 June 0011 0 July 0011 1 August 0100 0 September 0100 1 October 1000 0 November 1000 1 December 1001 0 Table 24. Years - years register (address 09h) bit description Bit Symbol Value Place value Description 7 to 4 YEARS 0 to 9 ten’s place actual year coded in BCD format 3to0 0to9 unit place |
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