MC68HC08AZ32A Datasheet, PDF (149/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 10. Break Module
10.1 Contents
10.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
10.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
10.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
10.4.1 Flag Protection During Break Interrupts . . . . . . . . . . . .151
10.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . 152
10.4.3 TIM and PIT During Break Interrupts . . . . . . . . . . . . . . . 152
10.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . 152
10.5 Break Module Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
10.5.1 Break Status and Control Register (BRKSCR) . . . . . . . 153
10.5.2 Break Address Registers (BRKH and BRKL) . . . . . . . . 154
10.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
10.6.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
10.6.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
10.2 Introduction
This section describes the break module. The break module can
generate a break interrupt which stops normal program flow at a defined
address in order to begin execution of a background program.
10.3 Features
Features of the break module include the following:
• Accessible I/O registers during the break interrupt
• CPU-generated break Interrupts
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Break Module
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Technical Data
149