AT91SAM7S64C-AU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT91SAM7S64C-AU

AT91SAM ARM-based Flash MCU

Atmel Corporation 

• EXT - shows the use of the extension identifier register

• NVPTYP and NVPSIZ - identifies the type of embedded non-volatile memory and its size

• ARCH - identifies the set of embedded peripheral

• SRAMSIZ - indicates the size of the embedded SRAM

• EPROC - indicates the embedded ARM processor

• VERSION - gives the revision of the silicon

The second register is device-dependent and reads 0 if the bit EXT is 0.

26.4.8 ICE Access Prevention

The Debug Unit allows blockage of access to the system through the ARM processor's ICE interface. This feature

is implemented via the register Force NTRST (DBGU_FNR), that allows assertion of the NTRST signal of the ICE

Interface. Writing the bit FNTRST (Force NTRST) to 1 in this register prevents any activity on the TAP controller.

On standard devices, the FNTRST bit resets to 0 and thus does not prevent ICE access.

This feature is especially useful on custom ROM devices for customers who do not want their on-chip code to be

visible.

SAM7S Series [DATASHEET]

6175M–ATARM–26-Oct-12

223

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