MCF8329A: I2C address CONFIG

Ignacio Hellín Mercadal

Part Number: MCF8329A

Tool/software:

Hello,

I have a medical device using two motors, each motor attached to one MCF8329 on same I2C BUS. I have change the DEVICE_CONFIG1 to 0x00200002, but the MCF8329 still accepts command on the I2C bus with the default factory target address 0x01, is it required to do anything else? any advice on how to connect both chips to same I2C bus?

Thank you very much,

Ignacio

8 months ago

+1 Joshua Horlander Cruz 8 months ago

TI__Mastermind 20470 points

Hi Ignacio,

The I2C address is set at power up and cannot be updated while the device is active. To set a MCF8329A's I2C address to a different value other than 1, please write the desired I2C address to the I2C_SLAVE_ADDR bit field and then preform an EEPROM write command. After writing to the EEPROM, power cycle the device and the I2C address should be updated to the new one.

Below is a power point covering the latest recommended EEPROM write procedure recommendations.

MCx EEPROM Write Procedure Recommendations.pdf

Regards,

Joshua

0 Ignacio Hellín Mercadal 8 months ago in reply to Joshua Horlander Cruz

Prodigy 20 points

Hello Joshua,

Thank you very much for the help, we have managed to swap the I2C address.

Best regards,

Ignacio

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MCF8329A: I2C address CONFIG