參數(shù)資料
型號(hào): 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): 21/156頁
文件大小: 1107K
代理商: MC68HC08LT8CFGE
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
117
Chapter 12
Computer Operating Properly (COP)
12.1 Introduction
The computer operating properly (COP) module contains a free-running counter that generates a reset if
allowed to overflow. The COP module helps software recover from runaway code. Prevent a COP reset
by clearing the COP counter periodically. The COP module can be disabled through the COPD bit in the
CONFIG1 register.
12.2 Functional Description
Figure 12-1 shows the structure of the COP module.
Figure 12-1. COP Block Diagram
COPCTL WRITE
CGMXCLK
RESET VECTOR FETCH
SIM RESET CIRCUIT
RESET STATUS REGISTER
INTERNAL RESET SOURCES(1)
SIM
C
LEAR
ST
AGES
5–
12
12-BIT SIM COUNTER
CL
EAR
ALL
STA
G
ES
COPD (FROM CONFIG1)
RESET
COPCTL WRITE
CLEAR
COP MODULE
COPEN (FROM SIM)
COP COUNTER
COP CLOCK
COP
TIME
OUT
COP RATE SEL
(COPRS FROM CONFIG1)
6-BIT COP COUNTER
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