Patent · US Active

Embedded memory protection

US8065512B2 · kind B2 · utility

2Cited by

7References

29Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Ata Khan · Sunnyvale, US
Greg Goodhue · San Jose, US
Pankaj Shrivastava · Tega Cay, US
Bas Van Der Veer · Fiddletown, US
Rick Varney · Campbell, US
Prithvi Nagaraj · Sunnyvale, US

Key dates

Filing date	Aug 22, 2006
Grant date	Nov 22, 2011
Priority date	—
Expiry date	Jul 20, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG06F12/1433
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

One embodiment of the present application includes a microcontroller (30) that has an embedded memory (46), a programmable processor (32), and a test interface (34). The memory (46) is accessible through the test interface (34). In response to resetting this microcontroller (30), a counter is started and the test interface (34) is initially set to a disabled state while an initiation program is executed. The test interface (34) is changed to an enabled state—such that access to the embedded memory (46) is permitted through it—when the counter reaches a predefined value unless the microcontroller (30) executes programming code before the predefined value is reached to provide the disabled state during subsequent microcontroller (30) operation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.