MC68HC908BD48 Datasheet, PDF (263/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

Technical Data — MC68HC908BD48
Section 20. Break Module (BRK)
20.1 Contents
20.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
20.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
20.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
20.4.1 Flag Protection During Break Interrupts . . . . . . . . . . . . . . . 266
20.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . 266
20.4.3 TIM During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . 266
20.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . 266
20.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
20.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
20.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
20.6 Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
20.6.1 Break Status and Control Register. . . . . . . . . . . . . . . . . . . 267
20.6.2 Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . . 268
20.6.3 SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 268
20.6.4 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . 270
20.2 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.
MC68HC908BD48 — Rev. 1.0
MOTOROLA
Break Module (BRK)
Technical Data
263