{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Step7 - ECEL 304 ECE Laboratory IV Winter 06-07 Dr...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECEL 304 ECE Laboratory IV Winter 06-07 Dr. Fontecchio Step 7 Final Changes Change ADC from free-running to clocked mode How do we control the ADC? Goals: During READ mode, when we are reading data from RAM onto the data bus, we do not want the ADC putting new data on the bus. We need the ADC outputs to be in tristate mode, also called high impedance or “Z” mode. During WRITE mode, when we are writing data to RAM from the data bus, the ADC must generate new data on every clock pulse. Unfortunately, we can not disable the DAC, so the digital data on the data bus appears as an analog output from the DAC. Accomplishing these Goals Information on the control of the ADC0804 can be pulled from its datasheet. What we will do is modify the self-clocking circuit (Fig. 17 on the ADC datasheet) to be triggered by our on-board clock and control circuit instead of the INTR pin. Assume ADC pin CS = 0, the ADC chip is always enabled.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern