8
Atmel AVR1923
8394B-AVR-02/12
Table 4-4.
Expansion header J3.
Pin on J3
Name on J3
XMEGA pin
Shared with onboard functionality
1
PA0 PA0 Light
(
2
PA1 PA1 Temperature
)
3
PA2 PA2 Filter
)
4
PA3 PA3 Display
reset
5
PB4 PB4 JTAG
TMS
6
PB5 PB5 JTAG
TDI
7
PB6 PB6 JTAG
TCK
8
PB7 PB7 JTAG
TDO
9 GND
- -
10 VCC_P5V0
- -
Note:
1. Can be disconnected from onboard functionality by cut-straps.
The header J4 offers digital communication interfaces such as UART and TWI but
care must be taken because some pins are also connected to on-board peripherals.
Table 4-5.
Expansion header J4.
Pin on J4
Name on J4
XMEGA pin
Shared with onboard functionality
1 SDA
PE0
-
2 SCL
PE1
-
3 RXD
PE2
-
4 TXD
PE3
-
5
SS
PD0
Display register select
(1)
6
MOSI
PD3
Serial flash MOSI
7
MISO
PD2
Display and serial flash MISO input
8
SCK
PD1
Display and serial flash clock input
9 GND
- -
10 VCC_P3V3
- -
Note:
1. Can be disconnected from onboard functionality by cut-strap (J204).
