Connect ENC28J60 module to V500 V2+ Expansion Header


WARNING :

  • All pins are 3.3V only. Do NOT connect 5V signals without proper level shifting.
  • Documented pinout is for GOLD2.9 and upwards only. Do NOT use it on earlier cores.
  • Apollo Team isn't be responsible for any damage made to your card.

All-in-one Pinout Sheet


1) Get an ENC28J60 module (make sure it's 3.3V !) from eBay

2) Get some Dupont wires (Male-to-Female) from eBay

3) Connect your module to Expansion Header with below pin-out

Expansion Connector ENCJ2860 Module
8 (MISO) So
1 (MOSI) Si
3 (nCS1) CS
6 (CLK) SCK
5 (IRQ) INT
7 (GND) GND
2 (+3.3V) VCC

4) Download and install latest SAGA drivers (>=1.3)

5) Enjoy the cheapest Amiga Ethernet device ever !


Connector Pin SPI Function UART Function Remarks
1 MOSI TXD
2 +3.3V +3.3V
3 nCS1 (SDNet) CTS FPGA internal Pullup 50k
4 nCS2 (USB, etc.) GPO1 FPGA internal Pullup 50k
5 IRQ RTS FPGA internal Pullup 50k
6 CLK GPO2
7 GND GND
8 MISO RX FPGA internal Pullup 50k

A set of test programs is available for newly made cables. Please make sure that the TCP/IP stack is inactive/offline before conducting the test. The SDNet distribution contains drivers, documentation and the test programs. In case of the V500v2 Expansion port described in this article, the test program is named v2expethtest. Please make sure that a LAN cable is connected from the module to an active Ethernet port (Switch,Router,…).

Open a CLI/Shell window, go with “CD” to the directory where v2expethtest is located (“bin” subdirectory of the SDNet distribution) and call v2expethtest without further arguments.

The tool will first verify that communication to the module is possible via SPI and then test available speeds. Please note that the speed index 0 is expected to fail. That is normal. Depending on the installed Core speed you may or may not be able to run speed index 1 successfully (speed 1 should work on Core x11, may fail on Core x12 and above).

After the memory transfer test, the tool will send out valid DHCP requests. You should see at least one of the LEDs blink periodically. Typical home networks do have a DHCP server running. In that case it should answer the requests.

The tool quits automatically after about 1 minute and prints out a conclusion to the performed tests.

The SANA-II driver for the ENC28J60 chip connected to the V500V2+ expansion port is named v2expeth.device. Please copy this file to the directory Devs:Networks. Create Devs:Networks if it didn't exist. Please consult the manual of your chosen TCP/IP stack how to add an Ethernet interface.

From version 1.94 on, v2expeth.device supports interrupt driven receive timing. On Core Gold 2.10 or later, you can enable the interrupt driven mode by the following CLI command sequence

makedir ENVARC:sana2
echo "TIMER=0 INTERRUPT PRI=6" >ENVARC:sana2/v2expeth.config

Less commonly used configuration options are outlined in the README file that comes with the SDNet distribution.

The full distribution of SDNet and V2Expeth can be downloaded here: SDNet-1.95.lha. In that archive you find the mentioned tools. Source code included.

  • expansionport.txt
  • Last modified: 2018/09/29 11:50
  • by bax