Descripción
The MAX7219 are compact, serial input/out- put common-cathode display drivers that interface microprocessors (μPs) to 7-segment numeric LED dis- plays of up to 8 digits, bar-graph displays, or 64 indi- vidual LEDs.
Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the seg- ment current for all LEDs
