User manual

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)
PA 10 M CDA 2 E T X 2
1- Boot SD Card Slot (DAT2),
2- ETHERNET DM9161A MII Interface (disconnected
by default, see R120)
PA 11 M CDA 3 E T X 3
1- Boot SD Card Slot (DAT3),
2- ETHERNET DM9161A MII Interface (disconnected
by default, see R119)
PA12 ETX0 ETHERNET DM9161A RMII Interface (PA12..PA19)
PA13 ETX1
PA 14 E R X0
PA 15 E R X1
PA16 ETXEN
PA 17 E R XDV
PA 18 E R XER
PA19 ETXCK
PA20 EMDC ETHERNET DM9161A MII/RMII Interface (PA20..PA21)
PA 21 E M DI O
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