#1	The MAX7219 is compact serial inputoutput commoncathode display drivers that interface microprocessors Ps to 7segment numeric LED displays of up to 8 digits bargraph displays or 64 individual LEDs
#2	Included onchip are a BCD codeB decoder multiplex scan circuitry segment and digit drivers and an 8x8 static RAM that stores each digit
#3	Only one external resistor is required to set the segment current for all LEDs A convenient 3wire serial interface connects to all common Ps Individual digits may be addressed and updated without rewriting the entire display
#4	The MAX7219 also allow the user to select code B decoding or nodecode for each digit
#5	The devices include a 150A lowpower shutdown mode analog and digital brightness control a scan limit register that allows the user to display from 1 to 8 digits and a test mode that forces all LEDs on