Tips: as shown in the picture, the electronic components have been welded, and the pin and matrix are welded and assembled by themselves!
The MAX7219 is an integrated serial I/o common cathode display driver that connects a microprocessor to an 8-digit 7-segment digital LED display, or to a bar chart display or 64 individual leds. its
It includes an on-chip b-bcd encoder, a multiplex scan loop, a segment word drive, and an 8 by 8 static RAM to store each piece of data. Only one external register is used to set the segment current of each LED.
A convenient four - wire serial interface can be connected to the general microprocessor. Each data can be addressed without overwriting all of the display when updated. MAX7219 also allows the user to select encoding or no encoding for each piece of data.
The entire device includes A 150 A low-power off mode, analog and digital brightness control, A scan limit register that allows the user to display 1-8 bits of data, and A detection mode that makes all leds glow.
Only need 3 IO ports to drive 1 lattice! Lattice display without flicker! Support cascading!
Module parameters:
1. A single module can drive an 8*8 total negative lattice
2. Working voltage of the module: 5V
3. Module size: 3.2cm long X 3.2cm wide X 1.3cm high
4. 4 fixed screw holes with a diameter of 3mm
5. Module with input/output interface, supporting multiple modules cascade
Wiring instructions:
1. The left side of the module is the input port and the right side is the output port.
2. When controlling a single module, only the input port needs to be connected to the CPU
3. When multiple modules are cascaded, the input end of the first module is connected to the CPU, the output end is connected to the input end of the second module, the output end of the second module is connected to the input end of the third module, and so on...
Take 51 MCU as an example:
The VCC - 5 v
GND to GND
DIN - P2.0
CS - P2.1
The CLK - P2.2
