mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 94

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
8.2 Introduction
Technical Data
94
8.7
8.7.1
8.7.2
8.8
8.8.1
8.8.2
8.8.3
This section describes the system integration module (SIM), which
supports up to 8 external and/or internal interrupts. Together with the
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
I/O registers. 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
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
SIM Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Break Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Reset Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Break Flag Control Register . . . . . . . . . . . . . . . . . . . . . . .116
System Integration Module (SIM)
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Figure
8-1.
Figure 8-2
is a summary of the SIM
Freescale Semiconductor