It is an RGB LED dot matrix driver compatible with Arduino. It pairs the M54564 with a single DM163 constant current driver.
By using the DM163 it gets three 8+6 bit channels for hardware PWM control of the LEDs - This makes the ATmega328 much less busy.
Specifications
• support for 8-bit colors with 6-bit correction for each color in each dot
• 16 MHz PWM support
• dedicated GPIO and ADC interface
• hardware UART and IIC communication with easy cascading
• 24 constant current channels with 100 mA each
• 8 super-source driver channels with 500 mA each