Electronic apparatus including a memory device and method of rep

Details Electronic apparatus including a memory device and method of rep Electronic apparatus including a memory device and method of rep

1997-01-30

2000-07-18

Auve, Glenn A.

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

713 1, 713100, G06F 906

Patent

active

060921900

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.

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