MAX7219 is a kind of integrated serial input/output common cathode display drive, it connects the microprocessor with eight digit seven segment digital LED display, also can connect the line graph display or 64 independent leds.
It includes a piece of type B BCD coder, multiplexing scanning circuit, drive period of word, but also a 8 * 8 static RAM is used to store each data. Only an external registers used to set the period of current of each LED. A convenient four wire serial interface can join all general microprocessor.
Each data can be addressed in the update does not need to rewrite all the display. MAX7219 also allows users to each data selection code or code.
The device contains A 150 mu A low-power shutdown mode, analog and digital brightness control, A scan limit register allows the user to display 1-8 bits of data, there is also A let all LED detection mode. You just need to three IO mouth drive 1 lattice! Dot matrix display flicker-free! Support cascading!
A single module can drive an 8 * 8, a total of Yin lattice
The module working voltage: 5 v
The module size: 12.8 cm X 12.8 cm X 1.3 cm wide
64 fixed screw holes, aperture 3 mm
1 * MAX7219 lattice module
1 * 5Pin Line
1 * row Pin
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.