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which case slave not give the acknowledgement in the i2c protocol

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samikshya samal

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my program shows the out put in i2c simulator but when hard ware test same program not give the out put.
8051 microcontroller ,assembly language ,at24co4 eeprom used in this program.
 

You can expect the first ACK after the DEV_SEL sequence (unless the EEPROM is busy with finishing a write command internally).

Getting no ACK means
- wrong DEV_SEL code respectively address pin strap
- incorrect I2C waveform
 

I2C not give ACK signal if
1. Wrong Device ID
2. Wrong SW sequence
3. In some case Pull Up Resistor also affect.
 

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