Electronic apparatus including a memory device and method of reprogramming the memory device
US6092190A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1997 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Jan 30, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00403
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of reprogramming memory storing program instruction code for controlling operation of a microprocessor in which new data can be written to the memory by the microprocessor only in a write cycle and stored data can be read from the memory by the microprocessor only in a read cycle, the memory preventing the read cycle and said write cycle occurring at the same time is disclosed. The memory has first and second sectors for storing code, the first sector storing boot code for controlling operation of the microprocessor. The disclosed method includes the steps of erasing code stored in said second sector, writing new code including the boot code to the second sector, erasing the first sector, writing new boot code in the first sector preceded by an instruction to jump to said second sector and then rendering the jump instruction ineffective so that the next boot of the microprocessor will cause the microprocessor to be controlled by the new boot code in the first sector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.