Introduction To The Etm; Figure 5-1 Etm Block Diagram - Motorola DragonBall MC9328MX1 Reference Manual

Chapter 5
Embedded Trace Macrocell (ETM)
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The MC9328MX1 is equipped with an ARM9 Embedded Trace Macrocell (ETM9) module for real time
debugging which is a great help to a system designer because the MC9328MX1 is a highly integrated
processor, a very limited number of pins are available for debug purposes. ETM signals in MC9328MX1
are multiplexed with other function pins. This chapter contains a brief summary of the ETM features, for
details of ETM operation, please refer to the ETM9 Technical Reference Manual Rev.2a (ARM Limited:
2001, order number DDI0157E).

5.1 Introduction to the ETM

The ETM provides instruction and data trace for the ARM9™ family of microprocessors. This document
describes the interface between an ARM Thumb® family processor and the ETM. For details of the
interface between an ARM7™ processor and ETM7, refer to the ETM7 Technical Reference Manual
Rev.1 (ARM Limited: 2001, order number DDI0158D). The block diagram of the ETM is shown in
Figure 5-1.
Figure 5-1. ETM Block Diagram
MOTOROLA Embedded Trace Macrocell (ETM) 5-1