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16-bit Constant Current LED Driver with Error Detection

Version:A.001

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DM137

Serial Data Interface

The serial-in data (DAI) will be clocked into 16 bit shift register synchronized on the rising

edge of the clock (CLK). The data ‘1’ represents the corresponding current output ‘ON’, while the

data ‘0’ stands for ‘OFF’. The data will be transferred into the 16 bit latch synchronized on the rising

edge of the strobe signal (LAT); otherwise, the data will be latched. The latch pulse should be sent

after the falling edge of the last clock within a frame data.

The trigger timing of the serial-out data (DAO) can be selected by the SDO pin. When SDO is

set to ‘H’, the data will be shifted out on synchronization to the falling edge of the clock (CLK). And

when SDO is set to ‘L’, the data will be shifted out on synchronization to the rising edge of the

clock.