Nxp B.v.

Prithvi Nagaraj

Ata Khan

Craig A MacKenna

Rob Cosaro

Pankaj Shrivastava

Greg Goodhue

Rick Varney

Bas Van Der Veer

Flash-type memory access and control is facilitated (e.g., as random-access memory). According to an example embodiment, an interface communicates with and controls a flash memory circuit over a peripheral interface bus. The interface uses a FIFO buffer coupled to receive data from and store data for the flash memory circuit and to provide access to the stored data. An interface controller communicates with the flash memory circuit via the peripheral interface bus to initialize the flash memory circuit and to access data thereto, in response to requests from a processor. In some applications, the flash memory circuit is initialized by sending commands to it. The interface may be placed into a read-only mode in which data in the flash memory is accessed as part of main (computer) processor memory, using the FIFO to buffer data from the flash.

Flash memory interface

One embodiment of the present application includes a microcontroller () that has an embedded memory (), a programmable processor (), and a test interface (). The memory () is accessible through the test interface (). In response to resetting this microcontroller (), a counter is started and the test interface () is initially set to a disabled state while an initiation program is executed. The test interface () is changed to an enabled state&#x2014;such that access to the embedded memory () is permitted through it&#x2014;when the counter reaches a predefined value unless the microcontroller () executes programming code before the predefined value is reached to provide the disabled state during subsequent microcontroller () operation.

Embedded memory protection

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Sunnyvale, CA, United States of America

Prithvi Nagaraj