MC68HC908GT16_07 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GT16_07 Datasheet - Page 179

• Manufacturer Part Number: MC68HC908GT16_07
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 15
System Integration Module (SIM)
15.1 Introduction
This section describes the system integration module (SIM). Together with the central processor unit
(CPU), the SIM controls all microconroller unit (MCU) activities. A block diagram of the SIM is shown in
Figure
controller that coordinates CPU and exception timing.
The SIM is responsible for:
Table 15-1
Freescale Semiconductor
•
•
•
Bus clock generation and control for CPU and peripherals:
–
–
Master reset control, including power-on reset (POR) and computer operating properly (COP)
timeout
Interrupt arbitration
15-1.
Stop/wait/reset/break entry and recovery
Internal clock control
shows the internal signal names used in this section.
Table 15-1
Signal Name
CGMXCLK
CGMOUT
PORRST
IRST
R/W
IDB
IAB
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
is a summary of the SIM input/output (I/O) registers. The SIM is a system state
Selected clock source from internal clock generator module (ICG)
Clock output from ICG module
(Bus clock = CGMOUT divided by two)
Internal address bus
Internal data bus
Signal from the power-on reset module to the SIM
Internal reset signal
Read/write signal
Table 15-1. Signal Name Conventions
Description
179