Are there any problems if the SCK waveform is dulled that cascaded LED drivers are used?

This may cause trouble.

If the rising and falling edges of the SCK signal waveform are dulled as a countermeasure against electromagnetic waves and noise, the setup hold time between SIN and SCK cannot be secured, and data transfer may not be performed normally. Observe the setup hold time between SIN and SCK defined in the operating conditions of the detail specification.

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