3 - 1. In following diagram, explain how ODC register...

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

View Full Document Right Arrow Icon
1. In following diagram, explain how ODC register works. (10 points) RD ODC enable us to read the value of odc. When the odc is 0, the open drain is close. Then the mux will choose the input from port 0 and odc register will not make any effect. When odc is 1, the open drain is enabled. When DATA BUS is 0, after the “not” the “and” gate will be 1 and the tri-state buffer in IO cell will let the 0 out. When the data bus is not 0, the and gate will be 0 and no signal will be sent out in IO port. In other word, the voltage of IO port is
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 06/24/2011.

Page1 / 2

3 - 1. In following diagram, explain how ODC register...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online