ADS7128: ADS7128IRTER at data byte we are receiving NACK

Anusha M U

Prodigy 115 points

Part Number: ADS7128

Tool/software:

Hi,

We are able to receive ACK for the slave and address and Register address, when the data byte we are receiving NACK.

Clock Frequency is set to 400Khz and pull up value is 3.3kohm

Could you please help us how to proceed further?

10 months ago

0 Joel Meraz 10 months ago

TI__Mastermind 21350 points

Hi Anusha,

Are you able to send a logic capture showing the issue you are describing? Is this during a register write or read?

Regards,
Joel

0 Anusha M U 10 months ago in reply to Joel Meraz

Prodigy 115 points

when the master trying read the sensor data

0 Joel Meraz 10 months ago in reply to Anusha M U

TI__Mastermind 21350 points

Hi Anusha,

Is the device not acknowledging after the 7-bit address is sent, or is the controller not acknowledging after the device takes control of the bus and sends data?

Please send the logic analyzer or oscilloscope capture to help clarify.

Regards,
Joel

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ADS7128: ADS7128IRTER at data byte we are receiving NACK