2. PortuxG20 Connector Description

2.1. Pin-header X1

Pin-header X1 has 96 contacts in 2.54 mm (0,1 inch) grid pitch. It can be used to assemble DIN 41612 standard (IEC/EN 60603-2) connectors. The grid is organized in three rows (row a, b and c) with 32 contacts each. The pin assignment of this connector is described in Appendix D, PortuxG20 Pin Assignment.

In the default state no connector is assembled at all on the PortuxG20 to allow flexible use of the pins for the customer. The AT91SAM9G20's USARTs are organized in four ten-way connectors which can be assembled alternatively. They are named IF0, IF1, IF4 and IF5 and correspond to the AT91SAM9G20's USART0, 1,4 and 5 respectively. Samples for both connectors are contained in the Starterkit.

All levels of USARTs on X1 are low-level TTL (3.3V). In the following pin assignments, pins driven by the hardware IP of the AT91SAM9G20 are coloured. If further signals are needed they must be programmed individually by the user.

2.1.1. IF Default Assignment

PinAssignment
1 VCC
2 -DSR
3 RI
4 RXD
5 TXD
6 -DTR
7 -RTS
8 -CTS
9 -DCD
10 GND

Table 5.1. IF Pin Assignment


2.1.2. IF0 Pin Assignment

PinAssignmentX1-Pin Processor Pin
1 VCC B28 VCC
2 -DSR A28 PB22/DSR0/ISI_D2
3 RI B29 PB25/RI0/ISI_D5
4 RXD A29 PB05/RXD0
5 TXD B30 PB04/TXD0
6 -DTR A30 PB24/DTR0/ISI_D4
7 -RTS B31 PB26/RTS0/ISI_D6
8 -CTS A31 PB27/CTS0/ISI_D7
9 -DCD B32 PB23/DCD0/ISI_D3
10 GND A32 GND

Table 5.2. IF0 Pin Assignment


2.1.3. IF1 Pin Assignment

PinAssignmentX1-Pin Processor Pin
1 VCC B20 VCC
2 -DSR A20 PB17/TF0/TCLK4
3 RI B21 PB16/TK0/TCLK3
4 RXD A21 PB07/RXD1/TCLK2
5 TXD B22 PB06/TXD1/TCLK1
6 -DTR A22 PB19/RD0/TIOB5
7 -RTS B23 PB06/RTS1/ISI_PCK
8 -CTS A23PB29/CTS1/ISI_VSYNC
9 -DCD B24 PB18/TD0/TIOB4
10 GND A24 GND

Table 5.3. IF1 Pin Assignment


2.1.4. IF4 Pin Assignment

PinAssignmentX1-Pin Processor Pin
1 VCC B9 VCC
2 -DSR A9 PB21/RF0/ISI_D1
3 RI B10 PB20/RK0/ISI_D0
4 RXD A10 PA30/SCK2/RXD4
5 TXD B11 PA31/SCK0/TXD4
6 -DTR A11 PA03/SPI0_NPCS0/MCDB3
7 -RTS B12 PA02/SPI0_SPCK
8 -CTS A12 PA01/SPI0_MOSI/MCCDB
9 -DCD B13 PA00/SPI0_MISO/MCDB0
10 GND A13 GND

Table 5.4. IF4 Pin Assignment


2.1.5. IF5 Pin Assignment

PinAssignmentX1-Pin Processor Pin
1 VCC B1 VCC
2 -DSR A1 PB31/PCK1/ISI_MCK
3 RI B2 PB30/PCK0/ISI_HYSNC
4 RXD A2 PB13/RXD5/ISI_D11
5 TXD B3 PB12/TXD5/ISI_D10
6 -DTR A3 PB03/SPI1_NPCS0/TIOA5
7 -RTS B4 PB02/SPI1_SPCK/TIOA4
8 -CTS A4 PB01/SPI1_MOSI/TIOB3
9 -DCD B5 PB00/SPI1_MISO/TIOA3
10 GND A5 GND

Table 5.5. IF Pin Assignment


2.2. X2 RJ45 Jack

RJ45 jack for 10/100 MBit/s ethernet.

2.3. X3 DC 5V

Mini spring-clamp connection for 5V regulated DC-IN.

[Warning]Warning

Do not connect voltages above the specified 5V to the board. Overvoltage can result in damages beyond repair.

2.4. Pin-header X4

Pin-header X4 is an alternative assembling for the DSUB serial connector X6. Levels are RS232.

PinAssignment Processor Pin
1 -DCD PA22/ADTRG/ETXFR
2 DRXD PB14/DRXD
3 RXD PB09/RXD2
4 -RTS PA04/RTS2/MCDB2
5 TXD PB08/TXD2
6 -CTS PA05/CTS2/MCDB1
7 DTXD PB15/DTXD
8 -RI PA25/TCLK0/ERX2
9 GND GND
10 VNC VCC

Table 5.6. X4 Pin Assignment


2.5. X5 Micro SD-Card Slot

Four wire Micro SD-Card slot.

2.6. Pin-header X6

Pin-header X6 is a DSUB-connector in RS232 levels. It corresponds to USART2 of the AT91SAM9G20. On the original signals DSR and DTR is the AT91SAM9G20's debug serial port (DBGU). An adapter is needed (DBGU-Adapter) to connect to the DBGU. The adapter is part of the Starterkit contents. Schematics to build one can be found in Appendix E, Schematics DBGU Adaptor. With Jumper 6 (not assembled by default) RI can be powered by VCC 3.3V.

PinAssignment Processor Pin
1 -DCD PA22/ADTRG/ETXFR
2 RXD PB09/RXD2
3 TXD PB08/TXD2
4 DTXD PB15/DTXD
5 GND GND
6 DRXD PB14/DRXD
7 -RTS PA04/RTS2/MCDB2
8 -CTS PA05/CTS2/MCDB1
9 -RI PA25/TCLK0/ERX2
10 SERGND
11 SERGND

Table 5.7. X6 Pin Assignment


2.7. X7 USB Device Port

Full speed USB device port.

2.8. Pin-header X8 JTAG

16-way connector in 2.54 mm pitch grid. It allows access to the JTAG-Unit of the AT91SAM9G20. J16, J15 and J13 are not assembled.

2.9. X9 Dual USB Host Ports

Two full speed USB host ports.

2.10. A1 Battery Holder

Battery holder for CR 2032 battery for RTC backup.

2.11. GND1 and GND2

GND test pins

2.12. LEDs

LED Role Assignment
LED1ETH Speed Status
LED2 LED redBPC05/A24/SPI1_NPCS1
LED3 LED greenBPC04/A23/SPI1_NPCS2
LED4 LED yellow BPC10/A25/CTS3

Table 5.8. LED


2.13. Jumper

Jumper Role AssignmentDefault
J2 NRST Low NRST Unset
J3 Disable NCS3PC14/NCS3/IRQ2 Unset
J4 WKUP Low WKUP Unset
J10 BMS Low BMS Unset
J11 Power over USBD Set
J17 SHDN Low SHDN Unset
SW1 GPIO SwitchBPC06/TIOB2/CFCE1 Unset

Table 5.9. Jumper