参数资料
型号: MC68HC05P9AMDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 107/158页
文件大小: 3885K
代理商: MC68HC05P9AMDW
Resets and Interrupts
52
Resets and Interrupts
COP Watchdog
Reset
A timeout of the COP watchdog generates a COP reset. The COP
watchdog is part of a software error detection system and must be
cleared periodically to start a new timeout period. To clear the COP
watchdog and prevent a COP reset, write a logic 0 to bit 0 (COPC) of the
COP register at location $1FF0.
Low-Voltage Protection
A drop in power supply voltage below the minimum operating V
DD
voltage is called a brownout condition. A brownout while the MCU is in a
non-reset state can corrupt MCU operation and necessitate a power-on
reset to resume operation.
The best protection against brownout is an undervoltage sensing circuit
that pulls the RESET pin low when it detects a low-power supply voltage.
The undervoltage sensing circuit may be made of discrete components
or an integrated circuit can be used.
For information about brownout and the COP watchdog, see the
8-mc68hc05p9a
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相关代理商/技术参数
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MC68HC05P9AMP 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AP 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AVDW 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AVP 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9DW 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT