please help for the ethernet project

hi all...i'm doing project called single board computer.here i should use transceiver for communication between pc and pic18f microcontroller. my question is for communication between pic18f and pc i have to use ethernet system, is there any ethernet transceiver or any other method for this communication please help me...waiting for your reply.
thank you.

Hi,
There are plenty readymade ones: try **broken link removed** or **broken link removed** or their variants depending on your bandwidth requirements you can choose one.

Good luck

You can use a PIC18F97J60, which has a built-in ethernet interface, an external ethernet controller, e.g. ENC28J60, or a Wiznet controller (e.g. W5100) with hardware TCP/IP stack.

FvM said:

You can use a PIC18F97J60, which has a built-in ethernet interface, an external ethernet controller, e.g. ENC28J60, or a Wiznet controller (e.g. W5100) with hardware TCP/IP stack.

Click to expand...

i have idea in my mind is it possible to directly connect rj45 to pic controller?? please help its urgent.
thank you.

PIC18F97J60 family is the only single chip solution available from Microchip, PIC18 with built-in ethernet MAC and PHY.

FvM said:

PIC18F97J60 family is the only single chip solution available from Microchip, PIC18 with built-in ethernet MAC and PHY.

Click to expand...

that means external phy transceiver is not required.right!

lokesh88 said:

that means external phy transceiver is not required.right!

Click to expand...

Right, you need only rj45 connector with magnetic (magjack) and a few resistors and capacitors.

don diego said:

Right, you need only rj45 connector with magnetic (magjack) and a few resistors and capacitors.

Click to expand...

ok thank you very much. please help me some more...instead of using pluse transformer for isolation can i use opto coupler!!

It may be possible but why to complicate it? Using of pulse transformer is recommended by Microchip and it is standard in network devices.

can i use ADUM1400BRW TRANSFORMER for isolation or can any one suggest other part no..

The PHY to twisted pair ethernet media interface is an analog interface that can't be connected through optocouplers or digital isolators

transformerless ethernet connections can be made with capacitive isolation by using some of the latest (and external) ethernet PHY's.......
but as FVM said ethernet connections are analog....you cant use general galvanic isolators instead of transformer......

please mention any pulse transformer part no which is suitable for ethernet application.

Just enter "ethernet transformer 1:1 ct" at google.

FvM said:

Just enter "ethernet transformer 1:1 ct" at google.

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can i use H1042 transformer.

Yes, it's one of many 1:1 center tapped 10/100 MBit transformers.

You can also use Xport. Easy to use for Network Ethernet connectivity.

Best Regards,
Siong Boon
NO SIGNATURE LINKS ALLOWED

siongboon said:

You can also use Xport. Easy to use for Network Ethernet connectivity.

Best Regards,
Siong Boon
NO SIGNATURE LINKS ALLOWED

Click to expand...

thank for reply... xport is a new word to me...i googled it and came to it is inside rj45 and that will take your serial data stream and convert it to Ethernet packets. i want to know more about it can suggest any particular web site or reference schematic.

Hi lokesh88,

I assume you know something about USART or RS232.
When we design these USART communication, normally we use TTL serial communication.
To communicate with the computer system, we use MAX232 IC to convert the USART to RS232 format.

You can refer to this site for more about serial communication.
**broken link removed**

Xport is something like a MAX232 IC.
The Xport will convert USART serial information to Ethernet protocol.
It can be TCP/IP or UDP. These are the 2 fundamental protocol use in the Ethernet.

You can refer to the following Xport datasheet pg 7.
https://www.pic-control.com/product/pic-011_XPort_IG.pdf
You will see the same serial in & out pin. This is similar to a MAX232 IC.
So as you can see, Xport is simply a replacement.

The important approach is to understand USART, followed by RS232, RS485; They are easier to understand.
Ethernet's protocol is very much similar to usart. Ethernet is definitely more complex than usart.
There are much more data exchanged with many improved efficiency.
What you shouldn't forget is that the data are fundamentally still in serial format.
To me, USART, RS232, RS485, Ethernet are simply call "Serial Communication".
There are software/tools for RS232, so are there for Ethernet.

Which is the reason why I spent time to delicate a webpage just for Serial Communication.

I nearly got myself ban because the moderator thinks that I was spamming the forum today.
Most of my website page title has quite a unique name from the thread's topic.

Once you understand the fundamental, the rest will be easy to understand.
I also wrote another fundamental concept base on the title switch.
It was interesting in those days of exploring electronics concept.
Although I were a graduate in electronics course, but there were still a lot of things that I did not know.
The transistor alone took me 8-9years to understand.
I understand the concept better, when I study the history of technology evolution.
This is the reason why I spend time to write the webpage, and also provide a reference in the forum.

There are so many interesting to learn.
With so many passionate & experience technical expert here,
this forum is simply a great place to learn.

Best Regards,
Siong Boon

I think, it's misleading to say XPORT is like a MAX232 chip. It's an ethernet enabled microcontroller with an application specific firmware, providing different protocols on the ethernet side. It may be a convenient option, if you don't want to be bothered with ethernet protocol details. Technically, it does the same as a PIC variant with built-in ethernet interface can do.