參數(shù)資料
型號: ATTINY84A-CCU
廠商: Atmel
文件頁數(shù): 28/135頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 8K FLASH 15UFBGA
標準包裝: 490
系列: AVR® ATtiny
核心處理器: AVR
芯體尺寸: 8-位
速度: 20MHz
連通性: USI
外圍設備: 欠壓檢測/復位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 12
程序存儲器容量: 8KB(4K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 8x10b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 15-UFBGA
包裝: 托盤
123
32015G–AVR32–09/09
AT32AP7001
13.5
Functional Description
13.5.1
Watchdog Timer
The WDT is enabled by writing the EN bit in the CTRL register. This also enables the clock for
the prescaler. The PSEL bitfield in the same register selects the watchdog timeout period:
T
WDT = 2
(PSEL+1) * 30.518
μs
To avoid accidental disabling of the watchdog, the CTRL register must be written twice, first with
the KEY field set to 0x55, then 0xAA without changing the other bitfields. Failure to do so will
cause the write operation to be ignored, and CTRL does not change value.
The CLR register must be written with any value with regular intervals shorter than the watchdog
timeout period. Otherwise, the device will receive a soft reset, and the code will start executing
from the boot vector.
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ATTINY84A-MFR 制造商:Atmel Corporation 功能描述:16MHZ,4X4WQFN,HIGH GRADE +125C,GREEN,T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU 8BIT 8KB FLASH 20QFN 制造商:Atmel Corporation 功能描述:AVR, 8K FLASH 2K SRAM, 1KB EEPROM - 16MHz,4x4WQFN,High Grade +125C,Green,T&R
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