12-Channels Pre-programmable Constant Current LED Driver

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DM621

Serial Shift-In Luminance Data (Shift Register Architecture)

Figure 6. Serial Shift-In Luminance Data Structure

This serial shift (shift register) architecture follows a FIFO (first-in first-out) format.

The MSB (Most Significant Bit) data is the first data bit that shift into the driver.

The LSB (Least Significant Bit) data is the last bit in the data sequence.

And the PWM [1:0] command determines the data rate of each channel.