INTRODUCTION TO MICROPEOCESSOR
MODEL OF MICROPROCESSOR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1, 3 and 4
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2, 3 and 4
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1, 2 and 3
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1, 2 and 4
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Detailed explanation-1: -There are 6 general purpose registers in 8085 processor, i.e. B, C, D, E, H & L. Each register can hold 8-bit data. These registers can work in pair to hold 16-bit data and their pairing combination is like B-C, D-E & H-L.
Detailed explanation-2: -Stack Pointer: The 8085 microprocessor’s stack pointer is a 16-bit register that holds the address of the memory at the top of the stack. In a PUSH operation, the stack pointer’s value is decreased by 2. In POP operation, it will increase by two. Accumulator: There are 8 flip-flops in the register’s 8 bits.
Detailed explanation-3: -The flag register of 8085 microprocessor consists of 5 flags. The flag register is connected to ALU. When an operation is performed by ALU the result is transferred on data bus and status of result will be stored in flip flops. The different flags and their positions in flag register are shown in following fig.
Detailed explanation-4: -The 8085 has six general-purpose registers to store 8-bit data; these are identified as B, C, D, E, H and L as shown in the figure. They can be combined as register pairs-BC, DE, and HL-to perform some 16-bit operations.