Contents; Introduction; Section 22. Break Module (Brk) - Motorola MC68HC908AB32 Technical Data Manual

Technical Data — MC68HC908AB32

22.1 Contents

22.2 Introduction

MC68HC908AB32 Rev. 1.0
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MOTOROLA

Section 22. Break Module (BRK)

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
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.
Break Module (BRK)
Technical Data
365