Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[PIC] Nasty PIC Ethernet hack (two boards communiaction), will my idea work out?

Status
Not open for further replies.
A

Alloy

Advanced Member level 4
Joined
Apr 3, 2016
Messages
116
Helped
0
Reputation
0
Reaction score
0
Trophy points
16
Activity points
1,003
Hello guys.
I have an idea for a hacky solution for my PIC server project. Can you tell me if it will work out?
I want to do a PIC18F67J60 + H1102NL + RJ45 connector server.

BUT I have PIC18 soldered on TQFP breakout board and can't make a TQFP board myself.
So...


This is the MCU I will use:

The MCU will be soldered on such board:


There will be also a RJ45 jack + H1102NL transformer PCB, schematic:

The RJ45 jack + H1102NL transformer PCB layout:


MCU board will be connected to the RJ45 board by short wires.
And my question is...
1. Will this work? Are such connections acceptable?
2. Can anyone check the schematic of RJ45 board, is this correct for PIC18F67J60 ?
3. What is the best value for that inductor on RJ45 board?
 

I don't see any ethernet drivers. Do you planing to connect it directly to pins? Don't say yes, please.
 

Easyrider83 said:
I don't see any ethernet drivers. Do you planing to connect it directly to pins? Don't say yes, please.
Click to expand...

Yes yes yes, exacly! That's what's so briliant about it! PIC18F67J60 is the one of the two PIC18F MCUs with embedded Ethernet controller. You can confirm this by looking at datasheet.

Microchip said:
Feature rich PIC18 Microcontroller with an integrated 10Mbps Ethernet communications peripheral. This single-chip solution is ideal for applications requiring remote control and monitoring. Target applications include Idustrial Automation, Building Automation, Home control, Security and Instrumentation.
Click to expand...
 

I must admit that this is the first MCU I've seen that has both the MAC and PHY on board.
However, comparing your schematic with Figure 19-2 of the data sheet, you seem to be missing the pull-down resistors on your connector labelled J1. Also while there are 'optional' components that are in the figure but not on your schematic, I would recommend that you include them as EMI reduction can be important.
Finally, you can get 49.9 ohm 1% resistors so why not use them - I see you have 51ohm resistors specified.
Susan
 

I used the board that you showed that you will solder the MCU to. The problem is to fit the 0.1uF ceramic capacitors to within 5mm of the pins. I managed to do it but it was very difficult to do.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top