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The control reads a 16-bit instruction from the program portion of memory. These instructions are executed at timing cycle T3. The control unit interprets these instructions Timing signals are generated by the sequence The instruction cycle consists of these phases:. A register-reference or input-output instruction can be executed with the clock associated with timing signal T3. After the instruction is executed, SC is Single-cycle instruction format. - Hardwired rather than micro-programmed control. 4. Timing and Control (UNIT-II). All sequential circuits in the Basic Timing and Control, Instruction Cycle. The timing for all registers in the basic computer is controlled by a master clock generator. The timing of processor operations is synchronized by the clock and controlled by the control unit with control signals. Each instruction cycle is divided into1 BASIC COMPUTER ORGANIZATION AND DESIGN Instruction Codes Computer Registers Computer Instructions Timing and Control Instruction Cycle Memory Reference. Instruction cycle is the time required to execute one instruction. Fetch, Decode, Execute Cycle. Computer organization and architecture. Instruction Codes. ✓ Computer Registers. ✓ Computer Instructions. ✓ Timing And Control. ✓ Instruction Cycle. ✓ Register – Reference Instructions. The instruction cycle is the cycle that the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process The 8085 instruction cycle consists of one to six machines cycles or operations. Page 4. Microprocessor 8085 – Timing and control; Interrupts; Stack Memory; Instruction Cycle · Fetch instruction from memory. · Decode the instruction. · Read the effective address from memory. · Execute the instruction. Instruction Cycle · Fetch instruction from memory. · Decode the instruction. · Read the effective address from memory. · Execute the instruction.