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TM4C123BE6PM: Tiva™︎ TM4C123BE6PM Support PMbus and Smbus protocol ?

Dilesh Sahu
Prodigy 40 points
Part Number: TM4C123BE6PM

Tool/software:

TivaTm TM4C123BE6PM Support PMbus and Smbus protocol  as master device. if supports then can this device handle 4 pmbus slave?

  • 0
    TI__Guru**** 190616 points

    Hi,

      There are four I2C modules on the TM4C123 MCU. I'm not familiar with PMbus specifically. The I2C specification only describes the physical layer, timing, and flow control of a 2-wire bus. The I2C specification does not describe the format of messages (such as the SMBus or PMbus protocols) and does not describe the content of the messages.  As noted, the SMBus interface and PMbus are based on the I2C protocol; however, some differences exist. These differences must be handled through software in order to make sure the SMBus/PMbus protocol, including timing specifications, is met.

  • 0
    Prodigy 40 points

    is it possible for a TM4C123 to handle four slave devices

  • 0 in reply to Dilesh Sahu
    Prodigy 40 points

    is it possible for a TM4C123 to handle four slave devices to single I2C bus

  • 0 in reply to Dilesh Sahu
    TI__Guru**** 190616 points

    Hi,

      The I2C bus supports up to 127 devices on single master using the 7-bit address. But to work correctly it also requires proper termination (pull up resistors) and topology. Pull up resistors depend on operating voltage, speed, number of devices and how long bus cable is. I don't see any problem handling four slaves.