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AT91RM9200-CJ-002 Datasheet(PDF) 59 Page - ATMEL Corporation

Part # AT91RM9200-CJ-002
Description  ARM920T-based Microcontroller
Download  701 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT91RM9200-CJ-002 Datasheet(HTML) 59 Page - ATMEL Corporation

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59
1768I–ATARM–09-Jul-09
AT91RM9200
12. Debug and Test Features (DBG Test)
12.1
Overview
The AT91RM9200 features a number of complementary debug and test capabilities. A common
JTAG/ICE (In-Circuit Emulator) port is used for standard debugging functions such as download-
ing code and single-stepping through programs. An ETM (Embedded Trace Macrocell) provides
more sophisticated debug features such as address and data comparators, half-rate clock
mode, counters, sequencer and FIFO. 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 inter-
nal COMMTX and COMMRX signals that trace the activity of the Debug Communication
Channel.
A set of dedicated debug and test input/output pins give direct access to these capabilities from
a PC-based test environment.
Features of Debug and Test Features are:
• Integrated Embedded In-Circuit-Emulator
• Debug Unit
–Two-pin UART
– Debug Communication Channel
– Chip ID Register
• Embedded Trace Macrocell: ETM9 Rev2a
– Medium Level Implementation
– Half-rate Clock Mode
– Four Pairs of Address Comparators
– Two Data Comparators
– Eight Memory Map Decoder Inputs
–Two Counters
– One Sequencer
– One 18-byte FIFO
• IEEE1149.1 JTAG Boundary Scan on all Digital Pins


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