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MC68HC08AZ16 Datasheet, PDF (73/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit | |||
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System Integration Module (SIM)
Introduction
This section describes the system integration module, which supports up
to 24 external and/or internal interrupts. Together with the CPU, the SIM
controls all MCU activities. A block diagram of the SIM is shown in
Figure 1. Table 1 is a summary of the SIM I/O registers. The SIM is a
system state controller that coordinates CPU and exception timing. 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 COP
timeout
⢠Interrupt control:
â Acknowledge timing
â Arbitration control timing
â Vector address generation
⢠CPU enable/disable timing
⢠Modular architecture expandable to 128 interrupt sources
MC68HC08AZ32
72
System Integration Module (SIM)
2--sim
MOTOROLA
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