參數(shù)資料
型號: MC68HC08LT8CFGE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, ROHS COMPLIANT, MS-026BCB, LQFP-44
文件頁數(shù): 86/156頁
文件大?。?/td> 1107K
代理商: MC68HC08LT8CFGE
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
35
Chapter 4
System Integration Module (SIM)
4.1 Introduction
This section describes the system integration module (SIM). Together with the CPU, the SIM controls all
MCU activities. 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 COP timeout
Interrupt control:
Acknowledge timing
Arbitration control timing
Vector address generation
CPU enable/disable timing
Modular architecture expandable to 128 interrupt sources
Table 4-1. Signal Name Conventions
Signal Name
Description
CGMXCLK
Oscillator clock from oscillator module
IAB
Internal address bus
IDB
Internal data bus
PORRST
Signal from the power-on reset module to the SIM
IRST
Internal reset signal
R/W
Read/write signal
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