DS90UB927Q-Q1: work mode select and pin question

yang yanliang

Hi, Ti team,

1.MAPSEL/LFMODE/BKWD/REPEAT can through the way of software registers configuration, hardware and not pull/pulldown resistor reserved?

2.Can unused pins be floating? eg;I2S

3. Is there a "CMLOUT" pin for test eye diagram available?

+1 Hamzeh Jaradat over 5 years ago

Hello Yang,

1) LFMode in reg 0x04, MAPSEL in reg 0x13, BKWD Mode in reg 0x04, Repeater Mode can't be overriden using register.

2) Yes, please refer to datasheet. It is stated that these pins have internal pull down.

3) Serializers do not have CMLOUT. This function is available only on DES.

0 yang yanliang over 5 years ago in reply to Hamzeh Jaradat

Hi, Jaradat,

Serializer how to test eye diagram function?

0 Hamzeh Jaradat over 5 years ago in reply to yang yanliang

You may unplug the cable and measure eye diagram directly at the connector, or on the AC-Coupling capacitors.

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