PCF8564ACX9/B/1,02 NXP Semiconductors, PCF8564ACX9/B/1,02 Datasheet - Page 5

• Manufacturer Part Number: PCF8564ACX9/B/1,02
• Description: IC RTC/CALENDAR
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF8564ACX9/B/1,02

• 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: 568-6424-2; PCF8564ACX9/B/1,02

NXP Semiconductors
8. Functional description
PCF8564A
Product data sheet
8.1 CLKOUT output
The PCF8564A contains sixteen 8-bit registers with an auto-incrementing address
register, an on-chip 32.768 kHz oscillator with integrated capacitors, a frequency divider
which provides the source clock for the RTC, a programmable clock output, a timer, a
voltage low detector, and a 400 kHz I
All sixteen registers (see
although not all bits are implemented. The first two registers (memory address 00h and
01h) are used as control and/or status registers. The addresses 02h through 08h are used
as counters for the clock function (seconds up to years counters). Address locations 09h
through 0Ch contain alarm registers which define the conditions for an alarm. Address
0Dh controls the CLKOUT output frequency. 0Eh and 0Fh are the timer control and timer
registers, respectively.
The seconds, minutes, hours, days, weekdays, months, years, as well as the minute
alarm, hour alarm, day alarm, and weekday alarm registers are all coded in BCD format.
A programmable square wave is available at the CLKOUT pin. Frequencies of
32.768 kHz, 1.024 kHz, 32 Hz and 1 Hz can be generated for use as a system clock,
microcontroller clock, input to a charge pump, or for calibration of the oscillator. CLKOUT
is a CMOS push-pull output, and if disabled it becomes logic 0.
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 30 September 2010
Table
4) are designed as addressable 8-bit parallel registers
2
C-bus interface.
Real time clock and calendar
PCF8564A
© NXP B.V. 2010. All rights reserved.
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