METHOD AND CIRCUIT FOR LOADING TIMING OF OUTPUT DATA OF NONVOLATILE MEMORY

摘要

PURPOSE: To set a timing accurately while suppressing noise by loading a simulate signal to an output simulation circuit through a switch subjected to required control and resetting a simulate generation circuit in response to the variation of simulate signal. CONSTITUTION: Upon provision of a sync signal SYNC, a simulate signal SP is generated from the simulate signal generator 34 of delay FF and a load block signal SS makes a transition to L through a switch 35 opened by a load enable signal L before being loaded to an unblocked output simulation circuit 21. When the signal SP is inverted to 'L', output is inverted to H through a NAND gate 30 and an inverter 32 and the generator 34 is reset instantaneously through a monostable multivibrator 33. On the other hand, a signal SS is inverted to H and loading to the circuit 21 is blocked. According to the circuitry, loading of signal and blocking of loading are controlled accurately and the effect of noise due to housing is suppressed.