Spring11.FinalExam.keys.pdf - Department of Electrical and...

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Department of Electrical and Computer Engineering University of Alabama in Huntsville CPE 323 Introduction to Embedded Computer Systems Final Exam Solutions Instructor: Dr. Aleksandar Milenkovic Date: May 16, 2011 Place: EB 207 Time: 3:00 PM 5:00 PM Note: Work should be performed systematically and neatly. This exam is closed books and closed neighbor(s). Allowable items include exam, pencils, straight edge, calculator, and materials distributed by the instructor. Best wishes. Question Points Score 1 20 2 20 3 20 4 20 5 20 Sum 100 Please print in capitals: Last name:____________________________ First name: ___________________________
1. (20 points) MSP430 System Architecture/Miscellaneous Answer the questions or circle the correct answers when appropriate. A. (5 points) The MSP430F20xx device has an address space of 64 KB (the basic MSP430 architecture). Fill in the table below if we know the following. The first 16 bytes of the address space (starting at the address 0x0000) is reserved for special function registers (IE1, IE2, IFG1, IFG2, etc.), the next 240 bytes is reserved for 8-bit peripheral devices, and the next 256 bytes is reserved for 16-bit peripheral devices. The RAM memory of 512 bytes starts at the address 0x1000. At the top of the address space is 2 KB of flash memory reserved for code and interrupt vector table.
B. (2 points) The interrupt vector table is located in the flash memory at the very top of the first 64KB of address space. The interrupt vector table has 32 entries. Fill in the table below. What Start Address End Address
C. (2 points) The MSP430 main flash memory is partitioned into segments. A segment has 512 bytes and may be erased in a single step. How many segments does a 2 KB main flash memory have?
D. (1 points) (True | False ) The content of the flash memory is lost after the device is shut down. E. (1 points) (True | False ) The content of the RAM memory is lost when a system goes into a low-power mode.
F. (3 points) Consider a 10-bit analog-to-digital converter ADC10 that is configured with internal reference voltages such that V R- =0 V and V R+ =1.5 V. What is a digital value we can expect at the output for the input voltage Vin = 0.763 V? What is the error due to this conversion?
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