PCA8565 查看數據表（PDF） - Philips Electronics
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PCA8565 Datasheet PDF : 26 Pages
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Philips Semiconductors
PCA8565
Real time clock/calender
Table 18: Minute alarm (address 09H) bits description
Bit
Symbol
Value
Description
7
AE
0
minute alarm is enabled
1
minute alarm is disabled
6 to 0
alarm minutes 00 to 59 this register holds the minute alarm information coded in BCD format
Table 19: Hour alarm (address 0AH) bits description
Bit
Symbol
Value
Description
7
AE
0
hour alarm is enabled
1
hour alarm is disabled
5 to 0
alarm hours 00 to 23 this register holds the hour alarm information coded in BCD format
Table 20: Day alarm (address 0BH) bits description
Bit
Symbol
Value
Description
7
AE
0
day alarm is enabled
1
day alarm is disabled
5 to 0
alarm days
01 to 31
this register holds the day alarm information coded in BCD format
Table 21: Weekday alarm (address 0CH) bits description
Bit
Symbol Value
Description
7
AE
0
weekday alarm is enabled
1
weekday alarm is disabled
2 to 0
alarm
0 to 6
weekdays
this register holds the weekday alarm information coded in BCD format
8.6.5 CLOCKOUT control register
Table 22: CLKOUT control (address 0DH) bits description
Bit
Symbol Value
Description
7
FE
0
the CLKOUT output is inhibited and CLKOUT output is set to high-impedance
1
the CLKOUT output is activated
1 to 0
FD1 and
FD0
these bits control the frequency output at pin CLKOUT, see Table 23
Table 23: FD1 and FD0: CLKOUT frequency selection
FD1
FD0
CLKOUT frequency
0
0
32.768 kHz
0
1
1024 Hz
1
0
32 Hz
1
1
1 Hz
8.6.6 Countdown timer
The timer register is an 8-bit binary countdown timer. It is enabled and disabled via
the timer control register bit TE. The source clock for the timer is also selected by the
timer control register. Other timer properties such as interrupt generation are
controlled via control/status 2 register.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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