XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 148

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

System Integration Module (SIM)
9.2 Introduction
Technical Data
148
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. A block
diagram of the SIM is shown in
the SIM input/output (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
– 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
SIM Reset Status Register. . . . . . . . . . . . . . . . . . . . . . . . 167
SIM Break Flag Control Register . . . . . . . . . . . . . . . . . . 168
System Integration Module (SIM)
Figure
9-1.
Figure 9-2
MC68HC908AZ60A — Rev 2.0
is a summary of
MOTOROLA