TLC5957: Reading/Writing FC register with daisy-chained TLC5957 LED controllers

rob philip

Part Number: TLC5957

I'm using the TLC5957 chip, with 40 of them daisy-chained together. I've managed to derive how to push LED brightnesses to all the chips, but I'm still puzzled regarding writing and reading FC registers. When I send a "read FC" command, does it read the first one in the chain, the last one, or ? What about Write FC? First, last, all of them?

over 4 years ago

0 Charles-Chen over 4 years ago

TI__Genius 11836 points

Hi rob,

For write FC, you need to send command to each chip in the daisy chain. The message you send first corresponds to the last chip since they are using the same LAT signal.

0 rob philip over 4 years ago in reply to Charles-Chen

Prodigy 50 points

I will give that a try.

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TLC5957: Reading/Writing FC register with daisy-chained TLC5957 LED controllers