Microcontroller and embedded systems
Previous year question paper with solutions for Microcontroller and embedded systems
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- When is it required to use the control signals WR andRD ?
- What is the function of RST and TDX signals?
- What do you understand by Embedded Systems?
- Enlist some salient features of 8051.
- What are the two conditions under which program of codes are fetched from external, rather than internal memory?
- How many ways an 8051 can be interrupted?
- Explain the difference between MOVX and MOV instruction.
- How RETI and RET instructions differ?
- What is the function of SMOD bit in 8051?
- Write a sequence of instructions to set the AC flag.
- Discuss the function of these instructions : i) CJNE ii) ACALL iii) LCALL iv) MOVX
- Give the difference between microprocessors and micro controller.
- Give the structure of TMOD register.
- What is the concept of software partitioning?
- List the various interrupts of 8051 microcontroller.
- Discuss the RS 232 interface.
- What is bit addressability feature? List various bit addressable registers of 8051.
- Give specifications of ARM processors.
- Write down the applications of embedded systems.
- What are the data types and assembler directives of 8051?
- What do you mean by data types and directives in 8051 ?
- What is the function of PSW register?
- What are the contents of program counter register upon RESET of 8051?
- What is the significance of SBUF register?
- Write an 8051 assembly program to add two 8 bit numbers.
- What is the time period of the machine cycle of an 11.0592 MHz 8051 system?
- Differentiate between SJMP and LJMP instructions.
- What is the function of ALE and EA /VPP pins of 8051?
- What is the significance of TCON register?
- For the following instructions, state which bit of the which SFR will be affected : i. CLR 87H ii. CLR 92H