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PCF2127AT/1 数据表(PDF) 33 Page - NXP Semiconductors |
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PCF2127AT/1 数据表(HTML) 33 Page - NXP Semiconductors |
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33 / 80 page  PCF2127A_2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 — 7 May 2010 33 of 80 NXP Semiconductors PCF2127A Integrated RTC, TCXO and quartz crystal 8.10.2 Register Minute_alarm [1] Default value. 8.10.3 Register Hour_alarm [1] Default value. [2] Hour mode is set by the bit 12_24 in register Control_1. 8.10.4 Register Day_alarm [1] Default value. Table 30. Minute_alarm - minute alarm register (address 0Bh) bit description Bit Symbol Value Place value Description 7 AE_M 0 - minute alarm is enabled 1[1] - minute alarm is disabled 6 to 4 MINUTE_ALARM 0 to 5 ten’s place minute alarm information coded in BCD format 3to0 0to9 unit place Table 31. Hour_alarm - hour alarm register (address 0Ch) bit description Bit Symbol Value Place value Description 7 AE_H 0 - hour alarm is enabled 1[1] - hour alarm is disabled 6 - - - unused 12 hour mode[2] 5 AMPM 0 - indicates AM 1 - indicates PM 4 HOUR_ALARM 0 to 1 ten’s place hour alarm information coded in BCD format when in 12 hour mode 3to0 0to9 unit place 24 hour mode[2] 5 to 4 HOUR_ALARM 0 to 2 ten’s place hour alarm information coded in BCD format when in 24 hour mode 3to0 0to9 unit place Table 32. Day_alarm - day rearm register (address 0Dh) bit description Bit Symbol Value Place value Description 7 AE_D 0 - day alarm is enabled 1[1] - day alarm is disabled 6 - - - unused 5 to 4 DAY_ALARM 0 to 3 ten’s place day alarm information coded in BCD format 3to0 0to9 unit place |
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