Smart Electronics MAX7219 led dot matrix module 4 in 1 display module single chip microcomputer control drive module with 5p wire
Smart Electronics MAX7219 led dot matrix module 4 in 1 display module single chip microcomputer control drive module with 5p wire
MAX7219 is an integrated serial input/output common-cathode display driver, which connects a microprocessor and an 8-digit 7-segment digital LED display, and can also be connected to a bar graph display or 64 independent LEDs. It includes an on-chip B-type BCD encoder, multiple scan loops, segment word drivers, and an 8*8 static RAM to store each data. Only one external register is used to set the segment current of each LED.
Overview
MAX7219 is an integrated serial input/output common-cathode display driver, which connects a microprocessor
and an 8-digit 7-segment digital LED display, and can also be connected to a bar graph display or 64 independent
LEDs. It includes an on-chip B-type BCD encoder, multiple scan loops, segment word drivers, and an 8*8 static
RAM to store each 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 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.
Module parameters:
1. A single module can drive an 8*8 common cathode matrix
Wiring instructions:
1. The left side of the module is the input port, and the right side is the output port.
3. 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
Shipping list:
1. MAX7219 dot matrix module four in one (finished product, with dot matrix, tested) 2.20CM Dupont Line 5P
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