11/20/2022 0 Comments Serial shift register![]() ![]() These three pins are clock, data and latch pins.Īs we mentioned earlier, shift register takes one-bit data serially on every positive edge transition of clock signal and shift register holds this data. All three pins will be used as a digital output pin. ![]() To interface 74HC595 with PIC16F877A microcontroller, we will use three GPIO pins. In this example, we will control 8 LEDs with a 74HC595 shift register and PIC16F877A microcontroller. After transferring 8-bit data to the internal shift register, we send latch signal from Pic microcontroller to transfer data to storage register(output register)įor further information on 74HC595 serial shift register, check this link: First, we will send 8-bit data serially and a clock signal from microcontroller on DS and ST_CP ( clock) pins. Therefore, we will apply data, clock and latch signal from PIC16F877A microcontroller. ![]()
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