Spark Electronics MAX7219 LED dot matrix module

The MAX7219 is an integrated serial input / output common-cathode display driverit is connected to a microprocessor with 8-digit 7-segment digital LED display can also be connected to the bar graph display or 64 separate LED. On B BCD encoder including an on-chipmulti-channel scanning loop word drivebut also an 8 x 8 static RAM is used to store each data. Only one external register is used to set the current of each LED segment. (B.2)