RUNTIME REPROGRAMMING OF A PROCESSOR CODE SPACE MEMORY AREA
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United States of America Patent
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Issued Date -
Jan 19, 2012
app pub date -
Jul 16, 2010
filing date -
Jul 16, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a first embodiment of the present invention, a method for allowing a microprocessor to access a flash memory is provided, the method comprising: fetching code instructions and data from the flash memory via a unidirectional code bus coupled to a flash controller, which is coupled to a databus interface, which is coupled to the flash memory; executing the code instructions in a manner that is substantially similar to that as used for a read only memory (ROM) coupled to the microprocessor; and writing data to the flash memory via a bidirectional databus separate from the unidirectional code bus, wherein the bidirectional databus is coupled to the databus interface and to a scratch memory, wherein the writing comprises using write flash procedures located in the ROM, the write flash procedures comprising instructions for reading and using parameter values stored in the scratch memory and for erasing memory locations and writing data to memory locations in the flash memory.
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