PCF8563BS NXP [NXP Semiconductors], PCF8563BS Datasheet - Page 7

• Manufacturer Part Number: PCF8563BS
• Description: Real-time clock/calendar
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8563_6
Product data sheet
7.6.3 Time and date registers
Bits TIE and AIE: These bits activate or deactivate the generation of an interrupt when
TF or AF is asserted, respectively. The interrupt is the logical OR of these two conditions
when both AIE and TIE are set.
Table 5.
Table 6.
[1]
[2]
Table 7.
Bit
7 to 5
4
3
2
1
0
Source clock (Hz)
4096
64
1
1
Bit
7
6 to 0
60
TF and INT become active simultaneously.
n = loaded countdown value. Timer stopped when n = 0.
Symbol
0
TI_TP
AF
TF
AIE
TIE
Symbol
VL
SECONDS[6:0]
Control_status_2 - Control and Status register 2 (address 01h) bit description
INT operation (bit TI_TP = 1)
VL_seconds - Validity and Seconds register (address 02h) bit description
Value
0
1
0 (read)
1 (read)
0 (write)
1 (write)
0 (read)
1 (read)
0 (write)
1 (write)
0
1
0
1
Rev. 06 — 21 February 2008
Value
0
1
00 to 59
Description
default value is logic 0
INT is active when TF is active (subject to the status of TIE)
INT pulses active according to
TIE); note that if AF and AIE are active then INT will be
permanently active
alarm flag inactive
alarm flag active
alarm flag is cleared
alarm flag remains unchanged
timer flag inactive
timer flag active
timer flag is cleared
timer flag remains unchanged
alarm interrupt disabled
alarm interrupt enabled
timer interrupt disabled
timer interrupt enabled
INT period (s)
n = 1
1
1
1
1
8192
128
64
64
[2]
Description
clock integrity is guaranteed
integrity of the clock information is no longer guaranteed
the current seconds, coded in BCD format. Example:
seconds register contains x101 1001 = 59 seconds
[1]
Table 6
n > 1
1
1
1
1
4096
64
64
64
Real-time clock/calendar
(subject to the status of
[2]
PCF8563
© NXP B.V. 2008. All rights reserved.
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