Datasheet

Philips Semiconductors
PCF8563
Real time clock/calendar
Product data Rev. 04 — 12 March 2004 6 of 30
9397 750 12999
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.6 Register organization
Fig 6. Voltage-low detection.
handbook, halfpage
VL set
normal power
operation
period of battery
operation
t
V
DD
V
low
MGR887
Table 4: Binary formatted registers overview
Bit positions labelled as x are not implemented. Bit positions labelled with 0 should always be written with logic 0; if read they
could be either logic 0 or logic 1.
Address Register name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
00H control/status 1 TEST1 0 STOP 0 TESTC 0 0 0
01H control/status 2 0 0 0 TI/TP AF TF AIE TIE
0DH CLKOUT control FE xxxxxFD1FD0
0EH timer control TE xxxxxTD1TD0
0FH timer <timer countdown value>
Table 5: BCD formatted registers overview
Bit positions labelled as x are not implemented.
Address Register name BCD format tens nibble BCD format units nibble
Bit 7
2
3
Bit 6
2
2
Bit 5
2
1
Bit 4
2
0
Bit 3
2
3
Bit 2
2
2
Bit 1
2
1
Bit 0
2
0
02H seconds VL <seconds 00 to 59 coded in BCD>
03H minutes x <minutes 00 to 59 coded in BCD>
04H hours x x <hours 00 to 23 coded in BCD>
05H days x x <days 01 to 31 coded in BCD>
06H weekdays xxxxx <weekdays 0 to 6>
07H months/century C x x <months 01 to 12 coded in BCD>
08H years <years 00 to 99 coded in BCD>
09H minute alarm AE <minute alarm 00 to 59 coded in BCD>
0AH hour alarm AE x <hour alarm 00 to 23 coded in BCD>
0BH day alarm AE x <day alarm 01 to 31 coded in BCD>
0CH weekday alarm AE xxxx <weekday alarm 0 to 6>