NXP Semiconductors
PCF8583
Clock and calendar with 240 x 8-bit RAM
In the different modes the counter registers are programmed and arranged as shown in
Counter cycles are listed in
control/status
hundredth of a second
1/10 s
seconds
10 s
minutes
10 min
hours
1 min
D5
1s
D3
1/100 s
D1
control/status
00h
D0
01h
D2
02h
D4
free
03h
10 h
year/date
10 day
1h
free
1 day
weekdays/months
free
timer
1 day
alarm control
hundredth of a second alarm
alarm
D1
D3
alarm minutes
D5
alarm hours
free
alarm date
free
D4
T1
alarm control
alarm
D0
D2
T0
04h
05h
10 month
timer
10 day
1 month
06h
07h
08h
1/10 s
1/100 s
alarm seconds
09h
0Ah
0Bh
0Ch
0Dh
alarm month
free
0Eh
alarm timer
alarm timer
0Fh
free RAM
free RAM
CLOCK MODES
EVENT COUNTER
013aaa369
Fig 9.
Register arrangement
PCF8583
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© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 06 — 6 October 2010
8 of 37
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