Torwards
AT8563
Table 9 Value descriptions for bits AF and TF
Bit: AF Bit: TF
Description Description
R/W
Value
Value
0
alarm flag inactive
0
1
0
1
timer flag inactive
timer flag active
Read
1
alarm flag active
0
alarm flag is cleared
alarm flag remains unchanged
timer flag is cleared
Write
1
timer flag remains unchanged
2.7.3 Seconds, Minutes and Hours registers
Table 10: Seconds/VL register bits description
02H
b7
Symbol
VL
Description
VL = 0: reliable clock/calendar information is guaranteed;
VL = 1: reliable clock/calendar information is no longer guaranteed.
These bits represent the current seconds value coded in BCD format; value
= 00 to 59.
b6..0 <seconds>
Example: <seconds> = 101 1001, represents the value 59 s.
Table 11 Minutes register bits description
Description
03H
b7
Symbol
-
not implemented
These bits represent the current minutes value coded in BCD
format; value = 00 to 59.
b6..0 <minutes>
Table 12 Hours register bits description
Description
04H
b7..6
b5..0
Symbol
-
not implemented
These bits represent the current hours value coded in BCD format; value = 00
to 23.
<hours>
2.7.4 Days, Weekdays, Months/Century and Years registers
Table 13 Days register bits description
05H Symbol
b7..6
Description
-
not implemented
•
7
•
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