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參數(shù)資料
| 型號： | M308B8FCGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 18/70頁 |
| 文件大小： | 1150K |
| 代理商： | M308B8FCGP |
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25
XMEGA D4 [DATASHEET]
8135P–AVR–01/2014
12.
WDT – Watchdog Timer
12.1 Features
Issues a device reset if the timer is not reset before its timeout period
Asynchronous operation from dedicated oscillator
1kHz output of the 32kHz ultra low power oscillator
11 selectable timeout periods, from 8ms to 8s
Two operation modes:
Normal mode
Window mode
Configuration lock to prevent unwanted changes
12.2 Overview
The watchdog timer (WDT) is a system function for monitoring correct program operation. It makes it possible to recover
from error situations such as runaway or deadlocked code. The WDT is a timer, configured to a predefined timeout
period, and is constantly running when enabled. If the WDT is not reset within the timeout period, it will issue a
microcontroller reset. The WDT is reset by executing the WDR (watchdog timer reset) instruction from the application
code.
The window mode makes it possible to define a time slot or window inside the total timeout period during which WDT
must be reset. If the WDT is reset outside this window, either too early or too late, a system reset will be issued.
Compared to the normal mode, this can also catch situations where a code error causes constant WDR execution.
The WDT will run in active mode and all sleep modes, if enabled. It is asynchronous, runs from a CPU-independent clock
source, and will continue to operate to issue a system reset even if the main clocks fail.
The configuration change protection mechanism ensures that the WDT settings cannot be changed by accident. For
increased safety, a fuse for locking the WDT settings is also available.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M308B8FGGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
| M308B8SGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU M16C FAMILY / M32C/80 SERIES |
| M308B8SGP#U5 | 功能描述:MCU ROMLESS 32K RAM 144-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M32C/80/8B 產(chǎn)品培訓模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標準包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M309 | 功能描述:折皺器 CRIMP TOOL HIGH POWER RoHS:否 制造商:Hirose Connector 類型: 描述/功能:Cable and Shield Crimper |
| M-309 | 制造商:Daniels Manufacturing Corporation (DMC) 功能描述:CRIMPER |
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