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Unformatted text preview: EE2361 Spring 2007 Midterm Exam 2 Write your name and ID number here: 1 (/20) 2 (/20) 3 (/30) 4 (/15) 5 (/15) total (/100) 1 Problem 1: (Short answers) (20 points) A What is the entry point address for the high-priority interrupt service routine in the PIC18F452? B Whats the difference between a device status register and a device control register? C I want to represent the number e (approximately 2.71828182845904523536, the base for natural logarithms) using a signed 16 bit fixed point rep- resentation (capable of representing both positive and negative real numbers). Whats the smallest number of bits to the left of the binary point I can have? D I wish to use a 16-bit fixed-point representation to represent the num- bers between 0 and 1. What is the smallest worst-case error we could have in such a representation? (Note: each representation will have a worst-case error. I want you to figure out what the best representation is, to minimize this worst-case error.) E Whats the difference between the RETFIE and RETURN instruc- tions? (Ive only given you the summary sheet, so you have to answer this in your own words.) 2 Problem 2:...
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This note was uploaded on 04/07/2008 for the course EE 2361 taught by Professor Staff during the Spring '08 term at Minnesota.
- Spring '08