Atmel MCU Evaluation Kit AT32UC3L-EK AT32UC3L-EK 数据表

 

32150B-AVR-03/12 

This chapter presents the hardware blocks of the Atmel AT32UC3L-EK hardware 
design. Each hardware block is described with: 

•  An overview of the hardware block 
•  A location in the schematics document 
• AT32UC3L-specific 

information (when relevant) 

•  All possible hardware configurations of the block and available test points 

The power supply block of the AT32UC3L-EK is in charge of distributing power to all 
components of the board. 

Figure 3-1. AT32UC3L-EK power supply logical view. 

The AT32UC3L-EK can be powered from three different sources: the USB mini AB 
plug (5V input), an external power supply connected to the J2 header (DC 5V ±10%), 
and a 1.2V NiMh battery (in the J3 socket on the bottom side of the board). 

These inputs go through an external 3.3V switch mode regulator, which in turn 
supplies the rest of the board with a 3.3V voltage. 

The power indicator LED, D4, labeled POWER, indicates if the 3.3V from the external 
regulator is present. 

The pushbutton labeled SW2 is there to activate the use of the battery when one is 
installed in the J3 socket. 

The Atmel AT32UC3L064 firmware may read the battery current voltage with an 
ADCIFB channel.