Datasheet

MC68HC908LJ12 — Rev. 2.1 Technical Data
Freescale Semiconductor Break Module (BRK) 383
Technical Data — MC68HC908LJ12
Section 22. Break Module (BRK)
22.1 Contents
22.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .383
22.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .384
22.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .384
22.4.1 Flag Protection During Break Interrupts. . . . . . . . . . . . . . .386
22.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .386
22.4.3 TIM1 and TIM2 During Break Interrupts. . . . . . . . . . . . . . .386
22.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .386
22.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
22.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
22.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .387
22.6 Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .387
22.6.1 Break Status and Control Register. . . . . . . . . . . . . . . . . . .387
22.6.2 Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . .388
22.6.3 SIM Break Status Register. . . . . . . . . . . . . . . . . . . . . . . . .388
22.6.4 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . .390
22.2 Introduction
This section describes the break module. The break module can
generate a break interrupt that stops normal program flow at a defined
address to enter a background program.