UNIT-IV MICROCONTROLLERS 8051
TWO MARKS
1. What is mean by microcontroller?
A device which contains the microprocessor with integrated peripherals like memory, serial ports, parallel ports, timer/counter, interrupt controller, data acquisition interfaces like ADC, DAC is called microcontroller.
2. Explain DJNZ instruction of Intel 8051 microcontroller?
a) DJNZ Rn, rel
Decrement the content of the register Rn and jump if not zero. b) DJNZ direct, rel
Decrement the content of direct 8- bit address and jump if not zero.
3. State the function of RS and RS bits in the flag register of Intel 8051 microcontroller?
RS1, RS- Register bank select bits RS, RS- Bank Bank 0 Bank 1 Bank 2 Bank 3
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