connecting issue MPC5748G with SJA1105QEL

[SungBong]

Hi. 

I have a question about our system.

Host Processor is MPC5748G, Ethernet Switch is SJA1105QEL.

I am trying to connect from PC to MPC5748G using SJA1105QEL as below.

Do you think this system is possible or not?

In the manual, I referred MPC5748G connected with SJA1105QEL internally.

Must i connect MPC5748G with SJA1105QEL internally?

best regards.

thank you.

[bpe]

MPC5748G and SJA1105Q are separate devices, so any connection between them is external. If what was actually meant is, if a direct connection, i.e. no PHYs in between, is required, the answer is no, it is not required.  A workable connection can either be through complete Ethernet network interfaces on the both sides, or by (R)MII interfaces wired to each other directly. Note however, that in the case of a  direct connection, the interface modes must match, i.e. you can't connect an  MII to an RGMII.

Best Regards,
Platon

[SungBong]

Thank you for your reply.

what i meant internal connect is direct connect 

I understand MPC5748G can connect to SJA1105QEL directly with same interface(xMII).

but in the case of our system diagram above i uploaded (MPC5748G uses PHY with RJ45), is it possible to communicate to PC?

or it is not possible because interface is different?

best regards.

[bpe]

Yes, it is possible. The difference at the MAC/PHY interface level is abstracted by the PHYs when they are present in the transmission path.

Best Regards,
Platon

[SungBong]

In addition, this system operate correctly (except SJA1105QEL).

i tested ping from PC to MPC5748G.

[SungBong]

but our system doesn't work.

I tested ping from PC to MPC5748G, but it was failed.

I got the configuration tool for SJA1105.

i used the simplePQRS.py file to configure some options.

So i changed few options like below to operate correctly.

i changed HOST_PORT to 0 because MPC5748G connect to Port0 at SJA1105QEL.

i changed xMII_MODE[0] to RGMII because MPC5748G uses PHY.

i changed MACADDR to 0x223344556677 because MPC5748G has MAC ADDR as 0x223344556677

i changed speed to SPEED_1GBPS because RGMII speed is 1Gbps.

do i need any thing else to change?

thank you for your help.