PCF2123U/5GA/1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF2123U/5GA/1' PDF : 63 Pages View PDF
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
Three examples are given for clearing the flags. Clearing the flags is made by a write
command, therefore bits 7, 6, 4, 1 and 0 must be written with their previous values.
Repeatedly re-writing these bits has no influence on the functional behavior.
Table 31. Flag location in register Control_2
Register
Bit
7
6
5
4
3
2
1
0
Control_2
-
-
MSF -
AF
TF
-
-
Table 32, Table 33, and Table 34 show what instruction must be sent to clear the
appropriate flag.
Table 32. Example to clear only TF (bit 2) in register Control_2
Register
Bit
7
6
5
4
3
2
1
0
Control_2
-
-
1
-
1
0
-
-
Table 33. Example to clear only MSF (bit 5) in register Control_2
Register
Bit
7
6
5
4
3
2
1
0
Control_2
-
-
0
-
1
1
-
-
Table 34. Example to clear both TF and MSF (bit 2 and bit 5) in register Control_2
Register
Bit
7
6
5
4
3
2
1
0
Control_2
-
-
0
-
1
0
-
-
Clearing the alarm flag (bit AF) operates in exactly the same way, see Section 8.5.5.
PCF2123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 15 July 2013
© NXP B.V. 2013. All rights reserved.
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