STM32F107RC Ethernet minimal board

[martin159]

Posted on September 25, 2013 at 15:35

Hi, I would like to use with Ethernet. I need to build minimal board. In datasheet I found: ''Ethernet MAC interface with dedicated DMA and IEEE 1588 support''. Is possible to connect RJ45 connector directly to MCU or I must add any other electronics parts?

Is good choice to use Ethernet in MCU or is better to buy

https://www.olimex.com/Products/Modules/Ethernet/ENC28J60-H/

? How compilicated is minimal circuit with STM32 and Ethernet? Now I am using 8bit Arduino with ENC28J60 and board is very simple (

http://www.instructables.com/id/A-credit-card-sized-Ethernet-Arduino-compatable-co/?ALLSTEPS

). Thank you for help!

[Tesla DeLorean]

Posted on September 25, 2013 at 15:53

How good are your design/implementation skills?

You will need a PHY and RJ45 with suitable magnetics. See Pg 18

http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/CD00246066.pdf

If you want a lower cost implementation that supports 100 Mbps rather than just 10 Mbps, you'd go with the MAC integrated into the STM32, wouldn't you?

[martin159]

Posted on September 25, 2013 at 18:28

My design skills are not very good :(

I am trying to build temperature watchdog with internet control. I need 1 input for 1-Wire temperature sensor, 2 outputs for relay and Ethernet interface. I do not need hight speed Ethernet, 10Mbps is sufficient. What MCU you recommend to me? I found

http://cz.farnell.com/stmicroelectronics/stm32f107rct6/mcu-32bit-cortexm3-256k-flash-64lqfp/dp/1737139

and it looks good for me. What is your opinion? So I need only MCU, 25MHz crystal, RJ45 to MCU separator (for example

http://cz.farnell.com/pulse/h1012nl/module-transformer-ethernet/dp/2113972

) and +3.3V power supply. Is it all?

[David Littell]

Posted on September 26, 2013 at 01:48Instead of re-inventing the wheel, possibly:

https://www.olimex.com/Products/ARM/ST/STM32-P107/