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PCF2129AT 数据表(PDF) 32 Page - NXP Semiconductors |
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PCF2129AT 数据表(HTML) 32 Page - NXP Semiconductors |
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32 / 68 page  PCF2129A_1 © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 01 — 13 January 2010 32 of 68 NXP Semiconductors PCF2129A Integrated RTC, TCXO and quartz crystal The following tables show what instruction must be sent to clear the appropriate flag. [1] The bits labeled as - have to be rewritten with the previous values. [1] The bits labeled as - have to be rewritten with the previous values. Table 33. Flag location in register Control_2 Register Bit 7 6 5 4 3 2 1 0 Control_2 MSF WDTF TSF2 AF T - - T Table 34. Example values in register Control_2 Register Bit 7 6 5 4 3 2 1 0 Control_2 1 01100 00 Table 35. Example to clear only AF (bit 4) Register Bit 7 6 5 4 3 2 1 0 Control_2 1 01000[1] 0[1] 0 Table 36. Example to clear only MSF (bit 7) Register Bit 7 6 5 4 3 2 1 0 Control_2 0 01100[1] 0[1] 0 |
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