參數資料
型號： MC68HC705E5P
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝： PLASTIC, DIP-28
文件頁數： 113/148頁
文件大?。?/td> 3554K
代理商： MC68HC705E5P
MC68HC705E5 — Rev. 1.0
General Release Specification
Computer Operating Properly (COP) Watchdog
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Release Specification — MC68HC705E5
Section 10. Computer Operating Properly (COP)
Watchdog
10.1 Contents
10.2 Introduction
The COP watchdog system is a mask-programmable feature which will
generate a system reset if not serviced within the specified COP timeout
period. The COP counter chain is derived from an output of the CPI
circuit. This input signal is divided to give the COP reset rate selected by
the first write to the system control and status register (SCSR) located at
address $13.
A COP reset is done by writing a logic 0 to bit zero of address $1FF0.
This will reset the COP counter chain and begin the timeout countdown
again. The COP counter chain is also cleared when the MCU is in reset
or stop mode.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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PDF描述
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