Atmel Evaluation Kit AT91SAM9G20-EK AT91SAM9G20-EK Data Sheet
Product codes
AT91SAM9G20-EK
Board Description
AT91SAM9G20-EK Evaluation Board User Guide
3-7
6413C–ATARM–18-Feb-09
3.14
PIO Usage
Table 3-1. I/O Peripheral Controller A
I/O Line
Peripheral A
Peripheral B
Comments
Function
PA0
SPI0_MISO
MCDB0
SPI DataFlash, SPI/MCI SD/MMC/DataFlash Slot
PA1
SPI0_MOSI
MCCDB
(PA0..PA5)
PA2
SPI0_SPCK
PA3
SPI0_NPCS0
MCDB3
PA4
RTS2
MCDB2
PA5
CTS2
MCDB1
PA6
MCDA0
Boot SD Card Slot (DAT0)
PA7
MCCDA
Boot SD Card Slot (CMD)
PA8
MCCK
MCI SD/MMC/DataFlash Slot (CLK)
PA9
MCDA1
Boot SD Card Slot (DAT1)
PA10
MCDA2
ETX2
1- Boot SD Card Slot (DAT2),
2- ETHERNET DM9161A MII Interface (disconnected
by default, see R120)
by default, see R120)
PA11
MCDA3
ETX3
1- Boot SD Card Slot (DAT3),
2- ETHERNET DM9161A MII Interface (disconnected
by default, see R119)
by default, see R119)
PA12
ETX0
ETHERNET DM9161A RMII Interface (PA12..PA19)
PA13
ETX1
PA14
ERX0
PA15
ERX1
PA16
ETXEN
PA17
ERXDV
PA18
ERXER
PA19
ETXCK
PA20
EMDC
ETHERNET DM9161A MII/RMII Interface (PA20..PA21)
PA21
EMDIO
PA22
ADTRG
ETXER
ETHERNET DM9161A MII Interface
PA23
TWD
ETX2
SERIAL EEPROM (SDA), WM8731 audio DAC
PA24
TWCK
ETX3
SERIAL EEPROM (SCL), WM8731 audio DAC
PA25
TCLK0
ERX2
ETHERNET DM9161A MII Interface (PA25..PA29)
PA26
TIOA0
ERX3
High-Drive
PA27
TIOA1
ERXCK
High-Drive
PA28
TIOA2
ECRS
High-Drive
PA29
SCK1
ECOL
PA30
SCK2
RXD4
(BP3) User's interface Push Button
PA31
SCK0
TXD4
(BP4) User's interface Push Button