MC68HC908LJ24 Datasheet, PDF (427/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Data Sheet – MC68HC908LJ24
Section 23. Break Module (BRK)
23.1 Contents
23.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427
23.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428
23.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .428
23.4.1 Flag Protection During Break Interrupts . . . . . . . . . . . . . . . 430
23.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .430
23.4.3 TIM1 and TIM2 During Break Interrupts. . . . . . . . . . . . . . . 430
23.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . 430
23.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430
23.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .430
23.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .431
23.6 Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431
23.6.1 Break Status and Control Register. . . . . . . . . . . . . . . . . . . 431
23.6.2 Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 432
23.6.3 SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 432
23.6.4 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . 434
23.2 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.
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Break Module (BRK)
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Data Sheet
427