Accelerator for mounting and interfacing a second CPU onto a motherboard
US5687358A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Feb 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an accelerator working in place of a CPU on a motherboard to speed up the processing. The accelerator can realize the high-speed processing even when a clock on the accelerator is not an integral multiple of a clock on the CPU. When a clock frequency of a clock signal CLK on the motherboard is equal to 20 MHz and a maximum frequency of a CPU (3) on an accelerator (100) is equal to 33 MHz, for example, the CPU (3) does not work properly by a doubled clock signal. In such a case, a clock multiplication circuit (3a) multiplies the clock signal CLK by 1.5 times to generate a clock signal CLK15. There are three different patterns in the relationship between the timing of access of the CPU 3 and the timing of access of the motherboard. The accelerator of the invention determines the appropriate timing in each case and allows the access of the CPU 3 to be synchronous with the access of the motherboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.