AT88CK109STK3 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT88CK109STK3' PDF : 38 Pages View PDF
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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