AT25DF021-SSH ATMEL [ATMEL Corporation], AT25DF021-SSH Datasheet - Page 6

• Manufacturer Part Number: AT25DF021-SSH
• Description: One mechanical button switch Three LEDs Four expansion headers
• Manufacturer: ATMEL [ATMEL Corporation]

4.2 I/O expansion headers
6
AVR32924
There are four available I/O expansion headers on the kit. Because of the low pin
count on the device, the I/O expansion header pins are shared with onboard
functionality. If “clean” expansion ports are needed, cut-straps are available on some
of the ADC inputs. Otherwise, it is only needed to remove a series resistor to remove
onboard functionality.
Table 4-2. UC3 I/O expansion header – J1.
Table 4-3. UC3 I/O expansion header – J2.
Pin
1
2
3
4
5
6
7
8
9
10
Pin
1
2
3
4
5
6
7
8
9
10
Notes:
J1
TWI SDA
TWI SCL
UART RX
UART TX
SPI CS1
SPI MOSI
SPI MISO
SPI SCK
GND
VCC_P3V3
J2
ADC0
ADC1
ADC2
ADC4
ADC7
ADC8
ADC6
ADC5
GND
VCC_ANA_P3V3
1. ADC channels can be disconnected from onboard functions by cutting the
2. ADC channels are shared with the Atmel QMatrix slider. Remove resistors on the
available cut-straps on the bottom side of the board.
lines to separate the sensors from the ADC.
(1)
(2)
(1)
(1)
(2)
(2)
Table 4-2
UC3 pin
PA21
PB05
PB11
PB10
PA08
PB03
PB02
PB01
-
-
UC3 pin
PA14
PA15
PA16
PA18
PB07
PB08
PB06
PB19
-
-
show what is shared on the respective header pins.
Shared with onboard functionality
Header J4, board controller
Header J4, board controller
Header J4
Header J4
-
Header J4, DataFlash
Header J4, DataFlash
Header J4, DataFlash
-
-
Shared with onboard functionality
RC filter output
QMatrix slider X0
Shorted to GND
NTC
-
QMatrix slider X3
-
QMatrix slider X1
-
-
®
32156A-AVR-01/11