Atmel MCU Evaluation Kit AT32UC3L-EK AT32UC3L-EK Data Sheet

 

32150B-AVR-03/12 

•  Two LEDs, D12 and D13, [with the default firmware (except the USB DFU boot 

loader) these LEDs are blinking, depending on the activity over the USB] 

•  The USB MODE pushbutton on the PCB. With the default pre-loaded firmware, 

this button is used at power up to choose between the virtual com port firmware or 
the HID QTouch Debug firmware (see Section 

, 

The Atmel AT32UC3B256 can be programmed: 

•  Through the JTAG interface J13 header (see 

 for the location of the J13 header) 

•  Through the USB DFU boot loader running on the Atmel AT32UC3B, accessible 

upon power up when the J12 header is closed 

IMPORTANT 

Programming the Atmel AT32UC3B1256 will overwrite the default firmware. 

The AT32UC3B1256 can be programmed and debugged through the JTAG interface 
J13 header. 

The AT32UC3B1256 is connected to the Atmel AT32UC3L064’s USART3 TX and RX 
pins. 

Figure 3-17. Atmel AT32UC3L-EK top view USB interface location.