Datasheet

PCF2127AT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 11 July 2013 42 of 86
NXP Semiconductors
PCF2127AT
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.
[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 41. Example values in register Control_2
Register Bit
7 6 5 4 3 2 1 0
Control_2 10111000
Table 42. Example to clear only CDTF (bit 3)
Register Bit
7 6 5 4 3 2 1 0
Control_2 1 0 1 1 0 -
[1]
-
[1]
-
[1]
Table 43. Example to clear only AF (bit 4)
Register Bit
7 6 5 4 3 2 1 0
Control_2 1 0 1 0 1 0
[1]
0
[1]
0
[1]
Table 44. Example to clear only MSF (bit 7)
Register Bit
7 6 5 4 3 2 1 0
Control_2 0 0 1 1 1 0
[1]
0
[1]
0
[1]
Table 45. Example to clear both CDTF and MSF
Register Bit
7 6 5 4 3 2 1 0
Control_2 0 0 1 1 0 0
[1]
0
[1]
0
[1]