MC68HC908LJ12 Datasheet, PDF (382/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

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.
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor
Break Module (BRK)
Technical Data
383