參數(shù)資料
型號: MC68HC08GP8AMFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 93/126頁
文件大小: 4243K
代理商: MC68HC08GP8AMFB
MC68HC08GP8A
Data Sheet
MOTOROLA
Computer Operating Properly (COP)
69
Data Sheet — MC68HC08GP8A
Section 5. Computer Operating Properly (COP)
5.1 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 mask
option register.
5.2 Functional Description
Figure 5-1 shows the structure of the COP module.
Figure 5-1. COP Block Diagram
COPCTL WRITE
CGMXCLK
RESET VECTOR FETCH
RESET CIRCUIT
RESET STATUS REGISTER
INTERNAL RESET SOURCES
12-BIT COP PRESCALER
CLE
AR
AL
L
STAGES
6-BIT COP COUNTER
COP DISABLE
RESET
COPCTL WRITE
CLEAR
COP MODULE
COPEN (FROM SIM)
COP COUNTER
COP CLOCK
COP
T
IMEOUT
STOP INSTRUCTION
(FROM MOR1)
COP RATE SEL
(FROM MOR1)
CLEAR
STAGE
S
5–
12
F
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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