pcf8563 NXP Semiconductors, pcf8563 Datasheet - Page 8

• Manufacturer Part Number: pcf8563
• Description: Real-time Clock/calendar
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8563_5
Product data sheet
Table 9.
Table 10.
[1]
Table 11.
[1]
Table 12.
Table 13.
[1]
Table 14.
Bit
5 to 0
Bit
5 to 0
Bit
2 to 0
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Bit
7
4 to 0
Month
January
February
March
April
May
June
The PCF8563 compensates for leap years by adding a 29th day to February if the year counter contains a
value which is exactly divisible by 4, including the year 00.
These bits may be re-assigned by the user.
These bits may be re-assigned by the user.
Symbol Value
DAYS
Symbol
WEEKDAYS 0 to 6
Symbol
CENTURY
MONTH
Symbol
HOURS
Hours (address 04h) bits description
Days (address 05h) bits description
Weekdays (address 06h) bits description
Weekday assignments
Months/century (address 07h) bits description
Month assignments
Bit 7
x
x
x
x
x
x
x
Bit 7
C
C
C
C
C
C
01 to 31
Value
00 to 23
Value
0
1
01 to 12
Value
Rev. 05 — 17 July 2007
Bit 6
x
x
x
x
x
x
x
Bit 6
x
x
x
x
x
x
Description
this register holds the current hours coded in BCD format
[1]
Description
this register holds the current day coded in BCD format
[1]
[1]
Bit 5
x
x
x
x
x
x
x
Bit 5
x
x
x
x
x
x
Description
this bit is toggled when the years register overflows from
99 to 00
this register holds the current month coded in BCD format,
see
Description
this register holds the current weekday coded in BCD
format, see
indicates the century is 20xx
indicates the century is 19xx
Table 14
Bit 4
x
x
x
x
x
x
x
Bit 4
0
0
0
0
0
0
Table 12
Bit 3
x
x
x
x
x
x
x
Bit 3
0
0
0
0
0
0
Bit 2
0
0
0
0
1
1
1
Bit 2
0
0
0
1
1
1
Real time clock/calendar
PCF8563
© NXP B.V. 2007. All rights reserved.
Bit 1
0
0
1
1
0
0
1
Bit 1
0
1
1
0
0
1
Bit 0
0
1
0
1
0
1
0
Bit 0
1
0
1
0
1
0
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