mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 88

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
7.2 Introduction
Data Sheet
88
7.7.1
7.7.2
7.8
7.8.1
7.8.2
7.8.3
This section describes the system integration module, which supports up
to 16 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
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:
– 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
7-1.
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
SIM Break Status Register (SBSR) . . . . . . . . . . . . . . . . . . 108
SIM Reset Status Register (SRSR) . . . . . . . . . . . . . . . . . . 109
SIM Break Flag Control Register (SBFCR) . . . . . . . . . . . . 110
System Integration Module (SIM)
Table 7-1
shows a summary of the SIM I/O registers. The
MC68HC908BD48
Freescale Semiconductor
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Rev. 2.1