PCF2131 is sending Acknowledgment

PK_1114 — Thu, 02 Feb 2023 10:51:14 GMT

Hai,

I am Working with the PCF2131is interfaced with the LPC54608 FC-7,

while Configuring the RTC it is going to slave not ACK state in I2C Bus Communication

Thank You,

B Pavan Kumar

Re: PCF2131 is sending Acknowledgment

TomasVaverka — Thu, 02 Feb 2023 11:46:34 GMT

Hi,

First of all, please double check that the IFS pin is connected to VDD:

Then please make sure that the 7-bit slave address (1010011) is placed in the upper 7 bits of the byte and the write/read bit is in the LSB. This means 0xA6 for a write and 0xA7 for a read. Best is to check it using a logic analyzer or an oscilloscope.

Best regards,

Tomas

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PCF2131 is sending Acknowledgment

Re: PCF2131 is sending Acknowledgment