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MC68HC908RK2 Datasheet, PDF (80/232 Pages) Motorola, Inc – Microcontroller Unit | |||
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System Integration Module (SIM)
6.8 SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
6.8.1 SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . 97
6.8.2 SIM Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 98
6.8.3 SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . . 99
6.2 Introduction
This section describes the system integration module (SIM). Together
with the central processor unit (CPU), the SIM controls all MCU
activities. The SIM is a system state controller that coordinates CPU and
exception timing. A block diagram of the SIM is shown in Figure 6-1.
Figure 6-2 is a summary of the SIM input/output (I/O) registers.
The SIM is responsible for:
⢠Bus clock generation and control for CPU and peripherals:
â Stop/wait/reset/break entry and recovery
â Internal clock control
⢠Master reset control, including power-on reset (POR) and
computer operating properly (COP) timeout
⢠Interrupt control:
â Acknowledge timing
â Arbitration control timing
â Vector address generation
⢠CPU enable/disable timing
Advance Information
80
System Integration Module (SIM)
MC68HC908RK2 â Rev. 4.0
MOTOROLA
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