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DRV8308 compatible EEPROMs

Max J
Prodigy 10 points
Other Parts Discussed in Thread: DRV8308

Which EEPROMs are compatible to the DRV8308? Is it only the 93C46B or are the 93C56B and 93C66B (they have more address bits as they are 2k and 4k) also compatible? Does only this EEPROM-family work or is it sufficient for an EEPROM to be microwire-compatible with a 16-bit-word?

Only few information is provided by the datasheet: "The serial EEPROM should be a microwire-compatible, 16-bit-word device, such as the 93C46B" is what I have found.

And is it possible to get detailed information of the communication between the DRV8308 and the EEPROM? Maybe similar to Figure 23/24 from the datasheet.

 

  • 0
    TI__Guru** 114905 points
    Hi Max,

    We will investigate this and get back to you in the next few days.
  • 0 in reply to Rick Duncan
    TI__Guru** 114905 points
    Hi Max,

    There are a few conditions that the EEPROM should meet:
    1) The EEPROM accepts the read command as 9 bits; beginning with 3'b110 followed by 6 address bits. Larger EEPROM use more bits for the address.
    2) The EEPROM is set to 16 bit organization
    3) Assuming the EEPROM is powered by VREG, it must be rated for 5VDC.

    If the above are met, the microwire EEPROM should work.

    The timing diagram for the DRV8308 read of the EEPROM data meets the recommended EEPROM timing. The 9 bit command is followed by 12 sets of 16 clocks to read the data for registers 0 through B.