ماژول صفحه نمایش دات ماتریس MAX7219

MAX7219 is an integrated serial input / output common-cathode display driver , which is connected to the microprocessor . 8 digit 7 -segment digital LED display. Which includes an on-chip B -type BCD encoder, multi-scan circuit, segment word drive, but also a 8 * 8 static RAM used to store each data. Only one external register is used to set the segment current for each LED
A convenient four-wire serial interface can be connected to all common microprocessors. Each data can be addressed at the time of updating without having to rewrite all the displays. The MAX7219 also allows the user to select or not code for each data.
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 bits of data, and a test mode for all LEDs to emit light.
It requires only 3 IO ports to drive 1 dot matrix! Dot matrix display without flicker! Support cascade!
Module parameters:
• A single module can drive an 8 * 8
· Module operating voltage: 5V
* Module size: Length 3.2 cm X Width 3.2 cm X Height 1.5 cm
· With 4 fixed screw holes, 3mm diameter, can be fixed with M3 copper pillars
· Module with input and output interface, support multiple modules cascade
Wiring instructions:
The left side of the module is the input port and the right side is the output port.
When controlling a single module, you only need to connect the input port to the CPU
When multiple modules are cascaded, the input of the first module is connected to the CPU, and the output is terminated at the input of the second module. The output of the second module is connected to the input of the third module.