Semiconductor integrated circuit and single chip microcomputer

摘要

PPROBLEM TO BE SOLVED: To execute the writing of both a program storage nonvolatile memory and a data storage nonvolatile memory which are different in write data sizes and write modes by a common nonvolatile control unit. PSOLUTION: A single chip microcomputer 1 is provided with a main CPU 2, program storage nonvolatile memories 5 and 6, a data storage nonvolatile memory 9 and a nonvolatile control unit 8. Data size information (H'80, H'40) and write mode information (H'E8, H'E9) are supplied from the main CPU 2 to the nonvolatile control unit 8 in storing a program whose write data size is large and in storing data whose write data size is small. In response to this information, the nonvolatile control unit 8 executes writing in the program storage nonvolatile memories 5 and 6 and the data storage nonvolatile memory 9 different in data sizes, and writing different in modes. PCOPYRIGHT: (C)2008,JPO&INPIT