EE 476: Homework 5

Due At the start of your 5th lab.

1. For the simple DAC circuit shown in Lab 5, each port output pin can be at Vcc=5 volts or at zero volts. Solutions using any computer program will be graded as a zero.
   1. Show that if the port output is 0x80 that the voltage going to the oscilloscope equals 2.5 volts.
   2. Show that if the port output is 0x40 that the voltage going to the oscilloscope equals 1.25 volts.
2. Simply storing pairs of byte-length DAC values for the (x,y) position of points will limit you to less than 500 points in 1k of memory. Describe a compression scheme which will allow your Lab 5 program to record and display more than 1000 points.