Timing & Control

Posted by iimtu on June 11th, 2018

The timing for all registers in the basic computer is controlled by a master clock generator. The clock pulses are applied to all flip-flops and registers in the system, including the flip-flops and registers in the control unit and the clock pulses do not change the state of a register unless the register is enabled by a control signal (Load). The control signals are generated in the control unit and provide control inputs for the multiplexers in the common bus, control inputs in processor registers, and micro operations for the accumulator. There are two major types of control organization hardwired control and micro programmed control. In the hardwired organization, the control logic is implemented with gates, flip-flops, decoders, and other digital circuits. In the micro programmed organization, the control information is stored in a control memory (if the design is modified, the micro program in control memory has to be updated).

The college of computer science and applications of IIMT University, Meerut which is rated as Best universities in Meerutas its curriculum is designed to give good understanding of computer architecture and organization. A memory read or writes cycle will be initiated with the rising edge of a timing signal, a memory read or writes cycle initiated by a timing signal will be completed by the time the next clock goes through its positive edge. The clock transition will then be used to load the memory word into a register. The memory cycle time is usually longer than the processor clock cycle. At time T0: AR←PC, Transfers the content of PC into AR if timing signal T0 is active, T0 is active during an entire clock cycle interval, During this time, the content of PC is placed onto the bus (with S2S1S0=010) and the LD (load) input of AR is enabled. The actual transfer does not occur until the end of the clock cycle when the clock goes through a positive transition, same positive clock transition increments the sequence counter SC from 0000 to 0001. The college of computer science and applications of IIMT University, Meerut which is rated as Best universities in Meerut is having proper infrastructure to taught students regarding different operations happening inside computer.