AT91SAM7S64C-AU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT91SAM7S64C-AU

AT91SAM ARM-based Flash MCU

Atmel Corporation 

26. Debug Unit (DBGU)

26.1

Overview

The Debug Unit provides a single entry point from the processor for access to all the debug capabilities of Atmel’s

ARM-based systems.

The Debug Unit features a two-pin UART that can be used for several debug and trace purposes and offers an

ideal medium for in-situ programming solutions and debug monitor communications. Moreover, the association

with two peripheral data controller channels permits packet handling for these tasks with processor time reduced to

a minimum.

The Debug Unit also makes the Debug Communication Channel (DCC) signals provided by the In-circuit Emulator

of the ARM processor visible to the software. These signals indicate the status of the DCC read and write registers

and generate an interrupt to the ARM processor, making possible the handling of the DCC under interrupt control.

Chip Identifier registers permit recognition of the device and its revision. These registers inform as to the sizes and

types of the on-chip memories, as well as the set of embedded peripherals.

Finally, the Debug Unit features a Force NTRST capability that enables the software to decide whether to prevent

access to the system via the In-circuit Emulator. This permits protection of the code, stored in ROM.

SAM7S Series [DATASHEET]

6175M–ATARM–26-Oct-12

215

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