MAX7219 dot matrix module 8-dot matrix 8-in -1 display module single chip microcomputer control drive LED module -78370

   

     MAX7219 is an integrated serial input/output common-cathode display driver. It connects a microprocessor and an 8-digit 7-segment digital LED display. It can also be connected to a bar graph display or 64 independent LEDs. A single module can Drive an 8*8 common cathode dot matrix, which includes an on-chip B-type BCD encoder, multiple scan loops, segment word drivers, and an 8*8 static RAM to store each data. There is only one external register for setting the segment current of each LED, and 32 fixing screw holes with a 3mm diameter.
A convenient four-wire serial interface can be connected to all general-purpose microprocessors. Each data can be addressed without rewriting all the displays when updating. MAX7219 also allows users to select encoding or not encoding for each data.
The entire device includes a 150μA low-power shutdown mode, analog and digital brightness control, a scan limit register allowing users to display 1-8 bits of data, and a detection mode to make all LEDs glow. Only 3 IO ports can drive 1 dot matrix! No flicker during dot matrix display! The module has input and output interfaces and supports cascading!

Parameter:
Working voltage: 5V
Specification size: 26.5cmX3.2cmX1.3cm (length × width × height)

Pin definition, interface description:
Input port on the left, output port on the right

Instructions for use:
When controlling a single module, you only need to connect the input port to the CPU
When multiple modules are cascaded, the input terminal of the first module is connected to the CPU, the output terminal is connected to the input terminal of the second module, the output terminal of the second module is connected to the input terminal of the third module, and so on...
Take 51 single chip microcomputer as an example:
VCC → 5V
GND → GND
DIN → P2.2
CS → P2.1
CLK → P2.0