WRITE CIRCUIT FOR AN ERASABLE PROGRAMMABLE READ ONLY MEMORY DEVICE OF A MICRO COMPUTER

摘要

The write circuit comprises a circuit responsive to an external clock signal WCLK and machine clock signals for supplying a clock signal CLK to a program counter of the microcomputer so as to successively increment an address produced in the program counter. The external clock signal WCLK has a frequency lower than those of the machine clock signal. The clock signal CLK has different frequencies during normal and write-in operation modes so that the address produced in the program counter is successively incremented in synchronism with the machine clock signals during the normal operation mode and is successively incremented in synchronism with the external clock signal WCLK during the write operation mode.