mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 134

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
9.2 Introduction
Technical Data
9.8
9.8.1
9.8.2
9.8.3
This section describes the system integration module (SIM), which
supports up to 32 external and/or internal interrupts. 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
a summary of the SIM input/output (I/O) registers.
The SIM is responsible for:
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Bus clock generation and control for CPU and peripherals:
– Stop/wait/reset/break entry and recovery
– Internal clock control
Master reset control, including power-on reset (POR) and
computer operating properly (COP) timeout
Interrupt control:
– Acknowledge timing
– Arbitration control timing
– Vector address generation
CPU enable/disable timing
Modular architecture expandable to 128 interrupt sources
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 151
SIM Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . 153
SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . 154
System Integration Module (SIM)
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Figure
MC68HC908AS60 — Rev. 1.0
9-1.
Figure 9-2
is