Microcomputer with embedded flash memory having on-chip programm

Details Microcomputer with embedded flash memory having on-chip programm Microcomputer with embedded flash memory having on-chip programm

1998-07-07

1999-10-26

An, Meng-Ai T.

Electrical computers and digital processing systems: processing

Processing architecture

Microprocessor or multichip or multimodule processor having...

712 32, 711101, 711103, 710 14, 710 36, 710 65, 714 42, 713 1, 713 2, G06F 906

Patent

active

059745282

ABSTRACT:
A microcomputer with embedded flash memory is provided, which has an on-chip programming capability that allows new data to be reprogrammed by the microcomputer itself into the embedded flash memory, without having to use external reprogramming tools. Moreover, a method is provided for programming data into the embedded flash memory of the microcomputer. The microcomputer includes a microprocessor unit, an embedded flash memory unit, a register set, and a bus multiplexer. The embedded flash memory unit is partitioned into a loader block for storing a loader program and a user block for storing at least one user application program. The new data that are to be programmed into the user block of the embedded flash memory unit are first transferred to and stored in the register set. In the embedded flash memory unit, only one of the loader block and the user block can be in active operation, which is controlled by the microprocessor unit. The microcomputer allows an on-chip programming process that allows the developer to update or change the old program data stored in the user block of the embedded flash memory unit more easily and cost-effectively, and without having to use external reprogramming tools.

REFERENCES:
patent: 5504903 (1996-04-01), Chen et al.
patent: 5678082 (1997-10-01), Miyazawa et al.
patent: 5818755 (1998-10-01), Koyanagi et al.
patent: 5841996 (1998-11-01), Nolan et al.
patent: 5848026 (1998-12-01), Ramamurthy et al.
patent: 5894549 (1999-04-01), Cheng

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