On-chip/off-chip memory switching using system configuration bit
US5426759A · kind A · utility
6Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1992 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Nov 9, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A processor fabricated in a semiconductor chip has on-chip program memory and access to off-chip program memory. Switching between the on-chip memory and the off-chip memory is effected in the course of program execution, without using a pin-out of the device package in which the processor is housed or encapsulated, by writing a system configuration bit stored in a memory location shared by the on-chip and off-chip memories to a "1" or a "0" according to whether the program instruction is to be executed from the on-chip memory or the off-chip memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.