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PCF2123 Datasheet(PDF) 16 Page - NXP Semiconductors |
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PCF2123 Datasheet(HTML) 16 Page - NXP Semiconductors |
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16 / 54 page  PCF2123_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 19 November 2008 16 of 54 NXP Semiconductors PCF2123 SPI Real time clock/calendar [1] Values shown in decimal. [1] Values shown in decimal. Table 15. Register Months (address 07h) bits description Bit Symbol Value Description 7 to 5 - - unused 4 to 0 MONTHS 01 to 12[1] this register holds the current month coded in BCD format, see Table 16 Table 16. Month assignments Month Upper-digit Digit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 January X X X 00001 February X X X 0 0 0 1 0 March X X X 0 0 0 1 1 April X X X 0 0 1 0 0 May X X X 00101 June X X X 00110 July X X X 00111 August X X X 0 1 0 0 0 September X X X 0 1 0 0 1 October X X X 1 0 0 0 0 November X X X 1 0 0 0 1 December X X X 1 0 0 1 0 Table 17. Register Years (address 08h) bits description Bit Symbol Value Description 7 to 0 YEARS 00 to 99[1] this register holds the current year coded in BCD format |
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