MBR0520L 查看數據表（PDF） - Atmel Corporation

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MBR0520L

AVR®-based AT88CK109BSTK3 CryptoAuthentication Starter Kit

Atmel Corporation 

AT88SCK109STK3

Figure 3. AT88Microbase Components (back side)

AT88SC108

CryptoCompanion

AT90USB1287

AVR

Main board

Supply Voltage

*see section 3.2.1

16MHz

Crystal

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

R1

R2

Main Board

Supply Voltage

3.3V

5.0V ( USB )

Comments

Default Setting

5.0 ( USB )

3.3V

Regulator

3.3V

CryptoCompanion

R1

0

R2

* Default

VCC

Main board

Supply Voltage

The CryptoCompanion supply voltage is always 3.3V, regardless of R1and R2 configuration.

3-6

8699A—CRYPTO—10/09

AT88CK109STK3 User Guide

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