MICROPROCESSOR AND MICROCONTROLLER

ICT

ARCHITECTURE OF 8085

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What unit / device is used to decode the instructions?
A
Decoder
B
Timer
C
Clock
D
Control logic unit
Explanation: 

Detailed explanation-1: -The CPU’s control unit decodes the program instruction once it is loaded into the instruction register (IR). A Decode Phase is the second phase of the instruction cycle. The instruction is decoded by the CPU’s control unit based on the operation code (OPCODE), determined by three bits (bit 12, 13, 14).

Detailed explanation-2: -6.4. Instruction fetch unit fetches an instruction belonging to the current thread using the program counter; 2. Instruction decode unit decodes the instruction and fetches register operands using the register set identifier; 3.

Detailed explanation-3: -An address decoder is a commonly used component in microelectronics that is used to select memory cells in randomly addressable memory devices. Such a memory cell consists of a fixed number of memory elements or bits. The address decoder is connected to an address bus and reads the address created there.

There is 1 question to complete.