MC68HC908MR8 Datasheet, PDF (329/372 Pages) Motorola, Inc – Microcontrollers

Technical Data — MC68HC908MR8
Section 20. Break (BRK)
20.1 Contents
20.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .329
20.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .330
20.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .330
20.4.1 Flag Protection During Break Interrupts . . . . . . . . . . . .330
20.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . .332
20.4.3 TIM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . .332
20.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . .332
20.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333
20.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333
20.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333
20.6 Break Module Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . .333
20.6.1 Break Status and Control Register. . . . . . . . . . . . . . . . .333
20.6.2 Break Address Registers. . . . . . . . . . . . . . . . . . . . . . . . .334
20.6.3 SIM Break Status Register. . . . . . . . . . . . . . . . . . . . . . . .336
20.6.4 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . .337
20.2 Introduction
This section describes the break (BRK) module. The break module can
generate a break interrupt that stops normal program flow at a defined
address to enter a background program.
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
Break (BRK)
Technical Data
329