MC68HC908RF2 Datasheet, PDF (103/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Advance Information — MC68HC908RF2
Section 7. Break Module (BRK)
7.1 Contents
7.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7.4.1 Flag Protection During Break Interrupts . . . . . . . . . . . . . . . 105
7.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .105
7.4.3 TIM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . 106
7.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .106
7.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
7.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
7.6 Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.6.1 Break Status and Control Register . . . . . . . . . . . . . . . . . . .107
7.6.2 Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 108
7.2 Introduction
The break module can generate a break interrupt that stops normal
program flow at a defined address to enter a background program.
7.3 Features
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
MC68HC908RF2 — Rev. 1
MOTOROLA
Break Module (BRK)
Advance Information
103