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SMT-0540-S-R 数据表(PDF) 8 Page - ATMEL Corporation

部件名 SMT-0540-S-R
功能描述  AT90USB1287 (AVR) 64 QFN device (2.7V < VCC < 5.5V)
PDF  38 Pages
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制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

SMT-0540-S-R 数据表(HTML) 8 Page - ATMEL Corporation

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AT88SCK109STK3
3-6
AT88CK109STK3 User Guide
8699A—CRYPTO—10/09
Figure 3.
AT88Microbase Components (back side)
3.2
Power Supply
3.2.1
USB powered
The on-board power supply circuitry allows two possible configurations for the main supply voltage.
Mounted Resistor
Main Board
Supply Voltage
Comments
R1
3.3V
R2
5.0V ( USB )
Default Setting
The CryptoCompanion supply voltage is always 3.3V, regardless of R1and R2 configuration.
5.0 ( USB )
3.3V
Regulator
CryptoCompanion
0
VCC
R2
R1
Main board
Supply Voltage
* Default
3.3V
16MHz
Crystal
AT88SC108
CryptoCompanion
AT90USB1287
AVR
Main board
Supply Voltage
*see section 3.2.1



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