s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 110

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
8.2 Introduction
Technical Data
110
8.8
8.8.1
8.8.2
8.8.3
This section describes the system integration module (SIM), 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
The SIM is a system state controller that coordinates CPU and exception
timing. The SIM is responsible for:
Table 8-1
•
•
•
•
•
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 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
SIM Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 127
SIM Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . . 128
SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . . . 129
Figure
System Integration Module (SIM)
shows the internal signal names used in this section.
8-1.
Figure 8-2
is a summary of the SIM I/O registers.
MC68HC908AB32
Freescale Semiconductor
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Rev. 1.1