OPT9221: How to trigger VD_IN?

Jongho Lee

Part Number: OPT9221
Other Parts Discussed in Thread: OPT8241

Hi,

I'm trying to use OPT 9221+OPT8241 in the slave mode to activate each frame independently.

For that, I need to trigger it with a pulse through VD_IN, but I don't know how to do this (I'm not familiar with hardware things). I know this is very basic question, but could you point me to any good examples or explanations for this please?

Thanks

over 6 years ago

0 Suramya Gupta over 6 years ago

TI__Expert 3975 points

Hi Jongho,

You need a signal generator - connect it to the EXT_VD_IN pin and give pulses at intervals based on your requirement.

Suramya

0 Jongho Lee over 6 years ago in reply to Suramya Gupta

Prodigy 190 points

Thanks for your reply.

I can't find the EXT_VD_IN pin on the OPT8241-CDK-EVM. Do I need to use debug connector J2?

Thanks

0 Suramya Gupta over 6 years ago in reply to Jongho Lee

TI__Expert 3975 points

Hi Jongho,

Yes, you need to use the J2 connector for EXT_VD_IN.

Suramya

0 Jongho Lee over 6 years ago in reply to Suramya Gupta

Prodigy 190 points

Thanks for you reply, Suramya.

I'm new in this field, so let me ask you very basic questions.

I'm trying to send a pulse via Arduino, so I think I need to connect Arduino to OPT8241-CDK-EVM through the J2 connector.

Q1: Is this correct? or Do I need more than these?

So I searched the J2 connector on the web to see how it looks like, but couldn't find the correct one.

Q2: What is the exact name of the J2 connector? Can I purchase it from Texas Instruments?

Thanks,

Sensors

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OPT9221: How to trigger VD_IN?