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These pins sink current from the display common cathode. Pins (2, 3, 5,6,7,8, 10, and 11): These are Digit Pins which are common o/p pins for all the segments of digits 0 to 7.Pin1 (DIN): DIN is the serial data i/p pin and this IC includes a 16-bit shift register where on each low to high CLK signal transition, the data can be loaded into this kind of register.This IC includes 24 pins where each pin and its functionality are discussed below.

The pin configuration of MAX7219 display driver IC is shown below. This LED display driver IC comprises a 150μA low-power blackout mode, control of analog & digital brightness, a scan limit register that permits the operator to exhibit from 1- 8 digits & a test mode that strengthens all LEDs to activate. The pins D0 to D7 contain data that is to be passed and D8 to D11 pins contain the address of the register.MAX7219 IC allows the operator to choose code-B decoding. Data is sent out at the serial output pin on the falling edge of CLK. Then this data is passed to either the digit or control registers on the rising edge of LOAD/CS. On the rising edge of a clock input, this data is shifted into the 16-bit shift register integrated inside this chip. How to use MAX7219?Ī 16-bit data is sent at serial DIN input. One of the biggest advantages of using this IC is you can address Individual digits without rewriting the entire display. 16×2 LCD Module – Liquid Crystal Displayĭue to its compact structure and four-wire serial interface, it can be connected to all common microprocessors (µPs), 7-segment LED displays, bar-graph displays, or 64 individual LEDs.The maximum current for each segment pin is 100mA and for each DIGIT ground pin is 500mA.MAX7219 works well in a temperature range of 0☌ to +70☌.The data is displayed on segments with a delay time of 2.2ms.It provides a feature of digital and analog brightness intensity control and a 150♚ shutdown mode in which the current of all segments is pulled to ground.

Normally, the voltage supply of +5V is used.