User manual

Atmel AVR32924: UC3-L0 XPLAINED Hardware User’s Guide [APPLICATION NOTE]

32156C−AVR−06/2013

Table 3-2. UC3-L0 Xplained I/O Expansion Header – J1.

Pin J1 UC3 pin Shared with onboard functionality

1 TWI SDA PA21 Header J4, board controller

2 TWI SCL PB05 Header J4, board controller

3 UART RX PB11 Header J4

4 UART TX PB10 Header J4

5 SPI CS2 PA08 -

6 SPI MOSI PB03 Header J4, DataFlash

7 SPI MISO PB02 Header J4, DataFlash

8 SPI SCK PB01 Header J4, DataFlash

9 GND - -

10 VCC_P3V3 - -

Table 3-3. UC3-L0 Xplained I/O Expansion Header – J2.

Pin J2 UC3 pin Shared with onboard functionality

1 ADC0

(1)

PA14 RC filter output

2 ADC1

(2)

PA15 QMatrix slider X0

3 ADC2

(1)

PA16 Shorted to GND

4 ADC4

(1)

PA18 NTC

5 ADC7 PB07 -

6 ADC8

(2)

PB08 QMatrix slider X3

7 ADC6 PB06 -

8 ADC5

(2)

PA19 QMatrix slider X1

9 GND - -

10 VCC_ANA_P3V3 - -

Notes:

1. ADC channels can be disconnected from onboard functions by cutting the available cut-straps on the

bottom side of the board.

ADC channels are shared with the QMatrix slider. Remove resistors on the lines to separate the sensors

from the ADC.