topic Re: PCF2131 I2C Slave Address in Other NXP Products

PCF2131 I2C Slave Address

krisg — Wed, 01 Sep 2021 21:27:52 GMT

What is the PCF2131 RTC I2C slave address. I couldn't find it in the datasheet.

Also can confirm that the PCF2129/PCF2127 slave I2C address is 0xa2?

Thanks

reyes — Mon, 06 Sep 2021 23:12:03 GMT

Hi,

PCF2131:

The appropriate I2C-bus slave address is 1010011. The entire I 2C-bus slave address byte is shown in Table 87 of the datasheet: https://www.nxp.com/docs/en/data-sheet/PCF2131DS.pdf

PCF2129:

The appropriate I2C-bus slave address is 1010001. The entire I2C-bus slave address byte is shown in Table 77 of the datasheet: https://www.nxp.com/docs/en/data-sheet/PCF2129.pdf

PCF2127:

The appropriate I2C-bus slave address is 1010001. The entire I2C-bus slave address byte is shown in Table 88 of the datasheet: https://www.nxp.com/docs/en/data-sheet/PCF2127.pdf

Regards,

Jose

rubensjunior — Thu, 11 Jan 2024 12:35:59 GMT

Considering the LSB, PCF 2131 would have address A6 and PCF2127 and PCF2129 would have address A2.