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CFPRM/D

ColdFire® Microprocessor

Freescale Semiconductor 

Freescale Semiconductor, Inc.

MCF5206e Overview

1.1.11.4 Interrupt Controller

The interrupt controller provides user-programmable control of 3 or 7 external interrupt to any one of 7

interrupt levels and 4 priority levels. The 3 external interrupt signals can be configured as either fixed

interrupt levels 1, 4, and 7, or as a 7-level encoded interrupt. The external interrupts can also be programmed

to any one of the four priority levels within the respective interrupt levels.

1.1.11.5 System Protection

The MCF5206e processor contains a 16-bit software watchdog timer with an 8-bit prescaler. The

programmable software watchdog timer provides either a level 7 interrupt or a hardware reset on timeout.

The MCF5206e processor also contains a reset status register that indicates the cause of the last reset.

1.1.11.6 JTAG

To help with system diagnostics and testing during manufacture, the MCF5206e processor includes

dedicated user-accessible test logic that complies with the IEEE 1149.1 standard for boundary scan

testability, often referred to as Joint Test Action Group, or JTAG. For more information, refer to the IEEE

1149.1 standard.

1.1.12 System Debug Interface

The ColdFire interface supports real-time trace and background debug mode. A 4-pin background debug

mode (BDM) interface provides system debug. The BDM is a superset of the BDM interface provided on

Motorola’s 683xxx family of parts.

In real-time trace, 4 status lines provide information on processor activity in real time (PST pins). A 4-bit

wide debug data bus (DDATA) displays operand data, which helps track the machine’s dynamic execution

path as the change-of-flow instructions execute. These signals are multiplexed with the 8-bit parallel port

for application development which does not use real-time trace.

1.1.13 System Diagrams

This section includes system and pinout diagrams. Figure 2 shows the system of the MCF5206e device.

MOTOROLA

MCF5206e Integrated ColdFire® Microprocessor Product Brief

7

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Go to: www.freescale.com

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