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Introduction
ARM DDI 0337I Copyright © 2005-2008, 2010 ARM Limited. All rights reserved. 1-5
ID072410 Non-Confidential
1.4 Configurable options
You can configure your Cortex-M3 implementation to include the following optional
components:
Note
You can only configure trace functionality in the following combinations:
no trace functionality
ITM and DWT
ITM, DWT, and ETM
ITM, DWT, ETM, and HTM.
You can configure the debug features provided in the DWT independently.
Table 1-1 Optional implementation components
Component Description
MPU See Chapter 5 Memory Protection Unit
FPB Flash Patch and Breakpoint Unit. See Chapter 7
Debug
DWT See Chapter 8 Data Watchpoint and Trace Unit
ITM See Chapter 9 Instrumentation Trace Macrocell Unit
ETM See Chapter 10 Embedded Trace Macrocell
AHB-AP
Advanced High-performance Bus Access Port. See
Chapter 7 Debug
HTM interface See AHB Trace Macrocell interface on page 2-6
TPIU See Chapter 11 Trace Port Interface Unit
WIC
Wake-up Interrupt Controller. See Low power modes
on page 6-3
Debug Port See Debug Port AHB-AP interface on page 2-6
Constant AHB control See Bus interfaces on page 2-4
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