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Question for connecting DAC101C081 with MSP430F5172

Other Parts Discussed in Thread: DAC101C081

Hello,

I recently met a problem. I tried to connect the DAC101C081 (6 pins, I2C) as slave mode with MSP430 (master mode). I connected ADR0 of DAC to GND and Va to 5V. However, when I tried to transmit the data from MSP to DAC, even if I set the slave address as 0x0Dh as datasheet, I could not receive the ACK from DAC. Could anyone provide the suggestion?

Thanks,

Yu

  • Hello,

    The address when communicating with the DAC101C081 the address byte consists of 7 bits for the address and 1 bit for read or write. 

    With ADR0 grounded the address is 000 1101.

    To write to the part you need to add a 0 to the end and so you send 0001 1010 (0x1A) for the address byte.  See Figure 26 in the datasheet.

    To read from the part you need to add a 1 to the end and so you send 0001 1011 (0x1B) for the address byte.  See Figure 27 in the datasheet.

    Mike