MAX7219 Digital Tube Display Module control module

Saving your microcontroller resources without open timer scan freeing the microcontroller to do more things! Only you need to update the display data, a data transfer!

• MAX7219 digital display control module
• MAX7219 is an integrated serial input / output common-cathode display driver, which connects the microprocessor 7-segment digital LED display with 8 digits, you can connect a bar graph display or 64 independent LED. On which includes a B-type BCD encoder chip, multi-channel scanning loop, segment word driver, but also an 8 x 8 static RAM for storing each data. Only one external register is used to set the segment current for each LED.
• A convenient four-wire serial interface can connect all the general-purpose microprocessor. Each data can be addressed in the update does not need to rewrite all of the display. MAX7219 also allows users to select each data coding or non-coding.
• The entire device contains a 150μA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to display 1-8 bit data, there is a LED light all the detection mode.
• Only three IO ports to drive eight digital tube! Digital flicker-free display! Support cascade!
• PCB plate fixed to the four corners of copper studs, which can effectively prevent a short circuit accident occurs!
• Digital tube 0.36 inches four one common cathode LED
• This module is compatible with 5V / 3.3V microcontroller (51 / AVR / STM32 .......)
• Wiring instructions (in program provides an example, you can access any IO ports, you can modify the port defined in the program):
• VCC → 5V
• GND → GND
• DIN → P00
• CS → P01
• CLK → P02

NOTES:

• VCC and GND Do not reversed, it would burn chip
• 51 MCU P0 port need pull-up resistor, if your device does not have pull-up resistor can be connected to other ports data lines