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DS90UB953-Q1: Does synchronous clock mode ignore CLKIN PIN input??

Part Number: DS90UB953-Q1

Hello Team,

I got simple question from customer.

Current customer board has OSC for async clock mode.

They want to change it to sync mode by register for test purpose. but this board still has OSC to input clock to CLKIN pin.

I understand even OSC supply CLK to CLKIN pin, its clock would be blocked when configure synchronous by Mode_SEL or register(0x03)

My understanding is correct??

Thank you.

  • Hello Harry,

    I would expect this should be okay and the device would just block the CLKIN, but we have never validated this kind of situation. We normally test Non-Synch with Oscillator, or Synch without Oscillator. But never keep oscillator connected while in Synchronous mode.