MAX7219, digital display module, the control module

Working voltage: 4.5V ~ 5.5V
Operating temperature: -40 ℃ ~ 80 ℃
Number of segments: 8 bits 8 segments 0.56 inches
IC: MAX7219EWG
Interface: 3-wire interface

1,3 line control interface
2, no real-time refresh, you need to change the data can be changed
3, support cascade, and do not take up more microcontroller IO
4, based on 51 single-chip driver and routines
5, to provide library files and routines
6, the program supports cascading, the use of very convenient