To immediately and easily recognize the use/disuse and use content of a ROM correction function by on-screen display by providing a display means to display the use/disuse of the ROM correction function of a microcomputer.
Nonvolatile memory 9 comprises a ROM correction information part 9A to store a ROM address and data for ROM correction and a ROM correction function use/disuse information part 9B. In the microcomputer 8, a nonvolatile memory processing circuit 8C takes out a signal from the ROM correction function use/disuse information part 9B in the nonvolatile memory 9, and delivers it to a ROM correction function use/disuse processing circuit 8B. The processing circuit 8B is to perform the processing of a display content and display time, etc., when the use/disuse of the ROM correction function is displayed on a 7 segment display device 10, and a processed signal is outputted from a 7 segment display driving circuit 8F via a ROM correction function use/disuse display processing circuit 8D.
JPS6476497 | SEMICONDUCTOR NON-VOLATILE MEMORY DEVICE |
JPS62273697 | WORDLINE DRIVE CIRCUIT IN SEMICONDUCTOR MEMORY DEVICE |
JPH03283095 | STORAGE DEVICE |