| 摘要 |
<p>PURPOSE:To easily change the program code and data in a ROM. CONSTITUTION:A flash EEPROM 2 where the program code, the data code, etc., are stored is provided, and this EEPROM is divided into a program code storage area 4, a data code storage area 5, and a bootstrap storage area 6, and change data from an external RAM 8 is written in areas 4 and 5 by the program stored in the bootstrap storage area 6. Thus, data is easily changed with a one-chip microcomputer 7 packaged on a substrate.</p> |
