Quiz 1 Computer interface (shift register)

what type of shift register is the 74HC595

8-bit

74HC595 is commonly used to

expand outputs pins

which pin on the 74HC595 is responsible for serial data input

pin 14

what is the purpose of the latch pin

output data to the parallel pins

what does the SH_CP (shift register clock input) pin do

shift data through the shift register

how many bits of data can the 74HC595

8

which command is used in Arduino to shift data to the 74HC595 shift register

shiftOut ()

in Arduino code what does LSBFIRST stand for

least significant bit first

what will happen if the latch pin is not pulsed after shifting data to the 74HC595

the output will not be updated

how many pins are required to control the 74HC595 from an Arduino

3

which pin on the 74HC595 serves as the master reset pin (MR)

pin 10

how are multiple LEDs controlled using a 74HC595 shift register in the provided programs

by shifting data into the register and updating all the LEDs at once

in program 1 what mods causes the LEDs to light from MSB to LSB

change LSBFIRST to MSBFIRST

which function is used to update the state of the LEDs in the Arduino programs

updateShiftRegister()

what is the purpose of the photocell in prg3

to measure the intensity of light and control how many LEDs light up

in prg3 how is the number of LEDs lit proportional to the light detected by the photocell

by dividing the light reading value to determine how many LEDs should light up

in prg4 what is being controlled by the 74HC595 shift register

7-seg display

how is the countdown from 9 to 0 displayed on the 7-seg display in prg4

using a binary array that holds the segment data for each number

which of the following is a benefit of using the 74HC595 shift register in Arduino projects

reduces the number of required microcontroller pins

In Program 5, how is the 74HC595 used to control a 4-digit 7-segment display?

By rapidly shifting out the binary pattern for each digit