Motorola MC68HC908AB32 - Contents; Introduction; Section 22. Break Module (BRK)

MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA Break Module (BRK) 365
Technical Data — MC68HC908AB32
Section 22. Break Module (BRK)
22.1 Contents
22.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .365
22.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .366
22.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .366
22.4.1 Flag Protection During Break Interrupts. . . . . . . . . . . . . . .368
22.4.2 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .368
22.4.3 PIT, TIMA, and TIMB During Break Interrupts . . . . . . . . . .368
22.4.4 COP During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . .368
22.5 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .368
22.5.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .368
22.5.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .369
22.6 Break Module Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .369
22.6.1 Break Status and Control Register. . . . . . . . . . . . . . . . . . .369
22.6.2 Break Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . .370
22.6.3 SIM Break Status Register. . . . . . . . . . . . . . . . . . . . . . . . .370
22.6.4 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . .372
22.2 Introduction
This section describes the break module (BRK). The break module can
generate a break interrupt that stops normal program flow at a defined
address to enter a background program.