PCF210AA NXP [NXP Semiconductors], PCF210AA Datasheet - Page 24
PCF210AA
Manufacturer Part Number
PCF210AA
Description
SPI Real time clock/calendar Time keeping application
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCF210AA.pdf
(63 pages)
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NXP Semiconductors
PCF2123
Product data sheet
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 30.
Table
appropriate flag.
Table 31.
Table 32.
Table 33.
Clearing the alarm flag (bit AF) operates in exactly the same way, see
Register
Control_2
Register
Control_2
Register
Control_2
Register
Control_2
31,
Table
Flag location in register Control_2
Example to clear only TF (bit 2) in register Control_2
Example to clear only MSF (bit 5) in register Control_2
Example to clear both TF and MSF (bit 2 and bit 5) in register Control_2
Bit
7
-
Bit
7
-
Bit
7
-
Bit
7
-
All information provided in this document is subject to legal disclaimers.
32, and
Rev. 5 — 27 April 2011
Table 33
-
-
-
-
6
6
6
6
show what instruction must be sent to clear the
5
MSF
5
1
5
0
5
0
4
-
4
-
4
-
4
-
3
AF
3
1
3
1
3
1
SPI Real time clock/calendar
2
TF
2
0
2
1
2
0
Section
PCF2123
© NXP B.V. 2011. All rights reserved.
1
-
1
-
1
-
1
-
8.5.5.
0
-
0
-
0
-
0
-
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