PCF85063ATLSLASH1 datasheet(30/55 Pages) NXP

30 / 55 page

NXP Semiconductors

PCF85063A

Tiny Real-Time Clock/calendar with alarm function and I2C-bus

mbc602

START

condition

clock pulse for

acknowledgement

not acknowledge

acknowledge

data output

by transmitter

data output

by receiver

SCL

from controller

Figure 21. Acknowledgement on the I2C-bus

8.5 I2C-bus protocol

8.5.1 Addressing

One I2C-bus slave address (1010 001) is reserved for the PCF85063A. The entire I2C-bus slave address byte is

shown in Table 38.

Slave address

Bit

MSB

LSB

R/W

Table 38. I2C slave address byte

After a START condition, the I2C slave address has to be sent to the PCF85063A device.

The R/W bit defines the direction of the following single or multiple byte data transfer (R/W = 0 for writing, R/W

= 1 for reading). For the format and the timing of the START condition (S), the STOP condition (P) and the

acknowledge bit (A) refer to the I2C-bus characteristics (see [8]). In the write mode, a data transfer is terminated

by sending either the STOP condition or the START condition of the next data transfer.

8.5.2 Clock and calendar READ or WRITE cycles

The I2C-bus configuration for the different PCF85063A READ and WRITE cycles is shown in Figure 22 and

Figure 23. The register address is a 5-bit value that defines which register is to be accessed next. The upper 3

bits of the register address are not used.

A P/S

acknowledge

from PCF85063A

acknowledge

from PCF85063A

acknowledge

from PCF85063A

slave address

write bit

00h to 11h

0 to n

data bytes

aaa-004435

START/

STOP

Figure 22. Master transmits to slave receiver (WRITE mode)

PCF85063A

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 7.1 — 8 November 2023

30 / 55

PCF85063ATL/1 数据表(PDF) 30 Page - NXP Semiconductors

PCF85063ATL/1 数据表(HTML) 30 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

数据表下载

链接网址

PCF85063ATL/1 数据表(PDF) 30 Page - NXP Semiconductors

PCF85063ATL/1 数据表(HTML) 30 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

数据表 下载

链接网址

数据表下载