Philips Semiconductors

PCA8565

Real time clock/calender

Product data

Rev. 01 — 31 March 2003

5 of 26

9397 750 10695

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

8.6 Register organization

Fig 4.

Voltage-low detection.

handbook, halfpage

VL set

normal power

operation

period of battery

operation

t

VDD

Vlow

MGR887

Table 4:

Binary formatted registers overview

Bit positions labelled as x are not implemented, those labelled with 0 should always be written with logic 0.

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

xxxxxFD1

FD0

0EH

timer control

TE

xxxxxTD1

TD0

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

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 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>