Dot Matrix 4 in 1 Display Module (MAX7219)

Description

MAX7219 4-in-1 Display Dot Matrix Module is an integrated serial input/output common-cathode display driver, it connects the microprocessor 7-segment digital LED display with 8 digits, you can also connect a bar graph display or 64 independent LED. Thereon including a B-type BCD encoder chip, multi-channel scanning loop segment word driver, but also a static RAM 8 x 8 for storing each data. Only one external register is used to set the segment current of each LED.

Specifications

• Dimensions: 57mm x 67mm (4 in 1 Module).
• Dimension: 32mm x 32mm x 1.5 mm (Single Module).
• A single module can drive an 8 x 8 dot matrix common cathode.
• Operating voltage: 5V.
• Fixing screws with 64 holes with a diameter 3mm.
• Module with input and output interfaces.
• Support for cascading multiple modules.

How to use

• The left side of the module to the input port, the right to an output port.
• When the control of a single module, simply input port connected to CPU.
• When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on.

Connections

• VCC: 5V.
• GND: GND.
• DIN: P2.2.
• CS: P2.1.
• CLK: P2.0.