• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 102 subscribers
  • Views 118 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TDA4VL-Q1: MCU_QSPI1_CS0 Connect with external 1v8 directly

Biao Li
Expert 5510 points
Part Number: TDA4VL-Q1

Tool/software:

Hi Expert,

customer wants to achieve some function with connect the 1V8 to MCU_QSPI1_CS0 pin directly (without pull up resistor). they can confirm there will not have current before the IO be powered. but I have some concern for the run time input current. when the CS pin is low is there have risk in your view? or we have some diode inside can prevent this input current? and because of the PCB have been fixed so they can't add pull up resistor again.

BR,

Biao 

  • +1
    TI__Mastermind 47440 points

    If the MCU_QSPI1_CS0 pin is connected directly to 1V8 power supply, customer need to ensure the pin does NOT drive low.  As long as the pin stays high or tri-stated, this should not be a problem.  If pin drives low, it could damage the IO cell.