Jawaharlal Nehru Technological University Anantapur 2010-1st Sem B.Tech Code :R7410505 2 IV .ester(R07)Regular s, ember/ember EMBEDDED SYSTEMS - Question Paper

Code :R7410505 2
IV B.Tech.I Semester(R07)Regular Examinations, November/December 2010
EMBEDDED SYSTEMS
(Computer Science & Engineering, info Technology, Computer Science & Systems
Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
? ? ? ? ?
1. (a) discuss about embedded processor for a complex system.
(b) discuss the importance of the subsequent processors in embedded systems.
i. Digital signal processor
ii. ASSP
2. (a) discuss about TCON and TMOD function registers relevant to counters and timers of
the 8051 microcontroller.
(b) Draw and discuss the timer/counter logic in which the resulting timer clock is gated to
the timer circuit.
3. discuss the subsequent terms, relevant to programming the 8051 microcontroller.
(a) Lines of code
(b) tags
(c) Instructions
(d) Comments
4. (a) discuss with suitable example, how to perform unsigned multiplication using relevant
mnemonics.
(b) Write an assembly language program to multiply the unsigned number in register R3 by
the unsigned number on port two and put the outcome in external RAM locations 10h (MSB)
and 11h (LSB). Place comments on every line of code.
5. With the aid of neat diagram the design approach for serial data communication with 8051
microcontroller based embedded system. Write down the necessary program.
6. elaborate the states of a task? discuss which is the entity controlling (scheduling) the transi-
tions form 1 state to a different in a task?
7. (a) discuss the hard real-time scheduling considerations.
(b) discuss the tools availability in different RTOS.
8. (a) discuss about the data transfer on the I2C bus with suitable timing diagrams.
(b) discuss the speci¯cations of I2C bus protocol

Earning:   Approval pending.