发明名称 |
PERIPHERAL CIRCUIT FOR MICRO-CPU |
摘要 |
<p>PURPOSE:To add and change application without redeveloping a custom LSI circuit by providing the custom LSI circuit with an access program to an aerial address space and a data steal terminal. CONSTITUTION:A program part in the custom LSI 1 in which programs are fixedly written is provided with an access program to an aerial address space and a bus buffer part in the custom LSI 1 is provided with a data steel terminal. The custom LSI 1 is also provided with a decoding address bus terminal and an I/O controlling terminal. An address decoding part 2 identifies its access by an address signal and a rea/write signal outputted from the custom LSI 1. Ports 7, 8 to be additional function parts can be constituted as additional parts to existing addresses by previously accessing aerial addresses by the program stored in the custom LSI 1 to read out inputs.</p> |
申请公布号 |
JPH086917(A) |
申请公布日期 |
1996.01.12 |
申请号 |
JP19940158134 |
申请日期 |
1994.06.16 |
申请人 |
TOYO COMMUN EQUIP CO LTD |
发明人 |
YOKOHAMA HIROKI;YASUMURO TAMIO |
分类号 |
G06F15/78;G06F9/06;(IPC1-7):G06F15/78 |
主分类号 |
G06F15/78 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|