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DS80PCI402 - Register question

Kawai
Guru 19785 points
Other Parts Discussed in Thread: DS80PCI402

Hi Team,

On DS80PCI402 register, I have following recognition and question, could you please tell me about them ?

1. ADR 0x0E bit5 : IDLE_AUTO
   If set to "1", Output is ENABLE/IDLE depend on the input signal level, if it is above or under Signal Detect Threhsold.
   If set to "0", Output is based on the setting of ADR 0x0E bit4.
   * IDLE Control must be override

2. ADR 0x0E bit4 : IDLE_SEL
   In spite of input signal level, output is forced to this setting.
   *IDLE Control must be override
   *At the default setting of SMBus mode, output is always ON.

3. ADR 0x10 bit7 : Short Circuit Protection
    Which pin is protected from short circuit ?  (IN, OUT, both to GND ?)

Thanks and Best Regards,
Kawai

  • 0
    TI__Mastermind 43795 points

    Kawai,

    ADR 0x0E helps to control CH0 which is one of 8 channels on the DS80PCI402

    In order to use register 0x0E bits [5:4] requires that register ADR 0x08[4] is set = 1, if 0x08[4] = 0 the IDLE is always controlled by signal detect.

    When 0x08[4] = 1

    0x0E[5] = 1 (IDLE is based on Signal Detect)

    0x0E[5] = 0 (IDLE is based on value in 0x0E[4]

    0x0E[4] = 1 Output = IDLE

    0x0E[4] = 0 Output = Active

    When 0x08[4] = 0 the Output is only based on Signal Detect.

    Note: Registers 0x12, 0x15, 0x1C, 0x23, 0x2B, 0x32, 0x39, 0x40 are all controlled in this way.

     

    All Channels have an output short circuit protection.  The output pins are protected from short circuit or to GND.  They will still draw a large amount of current so this condition is not recommended even with the short circuit protection "on".  The inputs do not require short circuit protection, they should not be connected to any external DC voltage, they should always be AC coupled.

    - Lee 

  • 0 in reply to Lee Sledjeski
    Guru 19785 points

    Lee-san,

    I understood.

    Thank you very much for your help.

    Best Regards,

    Kawai