Freescale Semiconductor, Inc.
Advance Information — MC68HC908RFRK2
Section 7. Break Module (BRK)
7.1 Contents
7.2
7.3
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
7.4
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Flag Protection During Break Interrupts. . . . . . . . . . . . . . .103
CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .103
TIM During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . .104
COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .104
7.4.1
7.4.2
7.4.3
7.4.4
7.5
7.5.1
7.5.2
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
7.6
7.6.1
7.6.2
Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Break Status and Control Register. . . . . . . . . . . . . . . . . . .105
Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . .106
7.2 Introduction
7.3 Features
The break module can generate a break interrupt that stops normal
program flow at a defined address to enter a background program.
Features of the break module (BRK) include:
•
•
•
•
Accessible input/output (I/O) registers during break interrupts
CPU-generated break interrupts
Software-generated break interrupts
COP disabling during break interrupts
MC68HC908RFRK2
MOTOROLA
Advance Information
Break Module (BRK)
101
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