| 摘要 |
PURPOSE:To use the same package in common by forming a package having a program testing terminal and the 1st and 2nd operation switching means in the package itself and operating the package as a piggyback type and evaluator type. CONSTITUTION:In the 1st operation as the piggyback type, a rewritable EPROM 11 is connected to the program testing terminal 12 of the package 10. In the 2nd operation as the evaluator type, a testing means such as a tool 8 is connected to the terminal 12. Both the operations are automatically switched by a multiplex selecting circuit which is a switching means. Consequently, the signal line can be sharply multiplexed, a piggyback type chip and an evaluator type chip can be used as the same device and these chips can be stored in the same package. |
