PCF8564ACX9/1,005 NXP Semiconductors, PCF8564ACX9/1,005 Datasheet - Page 18

• Manufacturer Part Number: PCF8564ACX9/1,005
• Description: IC RTC/CALENDAR I2C 9BUMP
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF8564ACX9/1,005

• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: Die
• Function: Serial Clock, Alarm, Calendar, Timer, Timer Interrupt
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C
• Supply Current: 1700 nA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 568-6640; PCF8564ACX9/1,005

NXP Semiconductors
PCF8564A
Product data sheet
8.10 STOP bit function
Repeat 7 and 8 for additional increments.
The function of the STOP bit is to allow for accurate starting of the time circuits. The STOP
bit function will cause the upper part of the prescaler (F
thus no 1 Hz ticks will be generated (see
will not increment until the STOP bit is released (see
The STOP bit function will not affect the output of 32.768 kHz on CLKOUT, but will stop
the generation of 1.024 kHz, 32 Hz and 1 Hz.
The lower two stages of the prescaler (F
is asynchronous to the crystal oscillator, the accuracy of re-starting the time circuits will be
between zero and one 8.192 kHz cycle (see
6. Read time registers to see the first change.
7. Apply 64 clock pulses to CLKOUT.
8. Read time registers to see the second change.
Fig 9.
Fig 10. STOP bit release timing
ATOR
STOP bit functional diagram
stop released
All information provided in this document is subject to legal disclaimers.
8192 Hz
Rev. 02 — 30 September 2010
F
0
F
OSCILLATOR STOP
DETECTOR
1
0
Figure
and F
Figure
0 μs to 122 μs
RESET
F
1
9). The time circuits can then be set and
2
) are not reset and because the I
10).
Figure 10
reset
2
32768 Hz
1024 Hz
to F
32 Hz
Real time clock and calendar
1 Hz
14
RESET
) to be held in reset and
and
F
13
PCF8564A
Table
001aaf912
© NXP B.V. 2010. All rights reserved.
CLKOUT source
RESET
26).
F
14
013aa
2
1 Hz
STO
C-bus
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