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參數(shù)資料
型號: AT90USB647-AU
廠商: Atmel
文件頁數(shù): 62/106頁
文件大小: 0K
描述: IC AVR MCU 64K 64TQFP
產(chǎn)品培訓(xùn)模塊: megaAVR Introduction
標(biāo)準(zhǔn)包裝: 450
系列: AVR®
應(yīng)用: USB 微控制器
核心處理器: AVR
程序存儲器類型: 閃存(64 kB)
控制器系列: AT90 USB
RAM 容量: 4K x 8
接口: 2 線串行,SPI 串行,USART,USB
輸入/輸出數(shù): 48
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-TQFP,64-VQFP
包裝: 托盤
供應(yīng)商設(shè)備封裝: 64-TQFP
配用: ATSTK600-RC17-ND - STK600 ROUTING CARD AVR
ATSTK525-ND - KIT STARTER FOR AT90USB
AT90USBKEY2-ND - KIT DEMO FOR AT90USB
其它名稱: AT90USB647-16AU
AT90USB647-16AU-ND
59
7593L–AVR–09/12
AT90USB64/128
voltage invokes the delay counter, which determines how long the device is kept in RESET after
V
CC rise. The RESET signal is activated again, without any delay, when VCC decreases below
the detection level.
Figure 9-2.
MCU start-up, RESET tied to V
CC.
Figure 9-3.
MCU start-up, RESET extended externally.
Note:
If VPOR or VCCRR parameter range can not be followed, an external reset is required.
9.4
External reset
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see Table 9-1 on page 58) will generate a reset, even if the clock is not
running. Shorter pulses are not guaranteed to generate a reset. When the applied signal
reaches the Reset Threshold Voltage – V
RST – on its positive edge, the delay counter starts the
MCU after the Time-out period – t
TOUT – has expired.
V
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
CC
V
POR
RESET
TIMEOUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
V
POR
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AT90USB82 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8/16K Bytes of ISP Flash and USB Controller