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DS110DF111 - Loopback setting in SMBus mode

Kawai
Guru 19785 points


Hi, please let me confirm how to use loopback function.

In SMBus mode, loopback setting is controled using register 0x07[1:0].

Is register 0x07 [1:0] only can be used in the following setting ?

Register 0x07 [1:0] = 0x0 : INA to OUTA, INB to OUTB
Register 0x07 [1:0] = 0x3 : INA to OUTB, INB to OUTA

What happens when this is set to 0x1 or 0x2 ?

  • 0
    TI__Intellectual 1985 points

    Hello Kawai,

    In SMBus mode, the loopacks are controlled as follows:

    • Register 0x07[1] enables/disables loopback for Channel A input to Channel B output
    • Register 0x07[0] enables/disables loopback for Channel B input to Channel A output

    Therefore you can have four unique scenarios:

    • Register 0x07[1:0]=0x0: Neither loopback is enabled
    • Register 0x07[1:0]=0x1: Loopback for Channel B input to Channel A output is enabled
    • Register 0x07[1:0]=0x2: Loopback for Channel A input to Channel B output is enabled
    • Register 0x07[1:0]=0x3: Both loopbacks are enabled

    Best regards,

    Casey