mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 157
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mcf5407
Manufacturer Part Number
mcf5407
Description
Mcf5407 Coldfire Integrated Microprocessor User
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MCF5407.pdf
(546 pages)
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Chapter 5
Debug Support
This chapter describes the Revision C enhanced hardware debug support in the MCF5407.
This revision of the ColdFire debug architecture encompasses the two earlier revisions.
5.1 Overview
The debug module is shown in Figure 5-1.
Debug support is divided into three areas:
• Real-time trace support—The ability to determine the dynamic execution path
• Background debug mode (BDM)—Provides low-level debugging in the ColdFire
• Real-time debug support—BDM requires the processor to be halted, which many
through an application is fundamental for debugging. The ColdFire solution
implements an 8-bit parallel output bus that reports processor execution status and
data to an external emulator system. See Section 5.3, “Real-Time Trace Support.”
processor complex. In BDM, the processor complex is halted and a variety of
commands can be sent to the processor to access memory and registers. The external
emulator uses a three-pin, serial, full-duplex channel. See Section 5.5, “Background
Debug Mode (BDM),” and Section 5.4, “Programming Model.”
real-time embedded applications cannot do. Debug interrupts let real-time systems
execute a unique service routine that can quickly save the contents of key registers
and variables and return the system to normal operation. The emulator can access
saved data because the hardware supports concurrent operation of the processor and
BDM-initiated commands. See Section 5.6, “Real-Time Debug Support.”
Control
BKPT
Figure 5-1. Processor/Debug Module Interface
ColdFire CPU Core
Debug Module
PSTDDATA[7:0]
Trace Port
PSTCLK
Chapter 5. Debug Support
Communication Port
DSCLK, DSI, DSO
High-speed
local bus
5-1
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