PCF85263ATT datasheet(7/100 Pages) NXP

Part #	PCF85263ATT

Description	Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus

PDF	100 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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7 / 100 page

PCF85263A

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Product data sheet

Rev. 4.1 — 27 November 2015

7 of 100

NXP Semiconductors

PCF85263A

Tiny RTC with alarm, battery switch-over, and I2C-bus

Functional description

The PCF85263A contains 8-bit registers for time information, for timestamp information

and registers for system configuration. Included is an auto-incrementing register address,

an on-chip 32.768 kHz oscillator with integrated capacitors, a frequency divider which

provides the source clock for the Real-Time Clock (RTC) and calender, and an I2C-bus

interface with a maximum data rate of 400 kbit/s.

The built-in address register will increment automatically after each read or write of a data

byte. After register 2Fh, the auto-incrementing will wrap around to address 00h (see

Figure 6).

All registers (see Table 5 on page 9, Table 6 on page 11, and Table 7 on page 13) are

designed as addressable 8-bit parallel registers although not all bits are implemented.

Figure 7 gives an overview of the address map.

Fig 6.

Address register incrementing

Fig 7.

PCF85263ATT Datasheet(PDF) 7 Page - NXP Semiconductors