AT91SAM9260 datasheet(49/798 Pages) ATMEL

49 / 798 page

6221I–ATARM–17-Jul-09

AT91SAM9260

11. AT91SAM9260 Debug and Test

11.1

Description

The AT91SAM9260 features a number of complementary debug and test capabilities. A com-

mon JTAG/ICE (In-Circuit Emulator) port is used for standard debugging functions, such as

downloading code and single-stepping through programs. The Debug Unit provides a two-pin

UART that can be used to upload an application into internal SRAM. It manages the interrupt

handling of the internal COMMTX and COMMRX signals that trace the activity of the Debug

Communication Channel.

A set of dedicated debug and test input/output pins gives direct access to these capabilities from

a PC-based test environment.

11.2

Embedded Characteristics

• ARM926 Real-time In-circuit Emulator

– Two real-time Watchpoint Units

– Two Independent Registers: Debug Control Register and Debug Status Register

– Test Access Port Accessible through JTAG Protocol

– Debug Communications Channel

• Debug Unit

–Two-pin UART

– Debug Communication Channel Interrupt Handling

– Chip ID Register

• IEEE1149.1 JTAG Boundary-scan on All Digital Pins

AT91SAM9260 Datasheet(PDF) 49 Page - ATMEL Corporation