I have just designed a prototype Arm 9 based board that uses a Davicom DM9161 ethernet chip operating in RM11 mode, basically it require...

I have just designed a prototype Arm 9 based board that uses a Davicom DM9161 ethernet chip operating in RM11 mode, basically it require a external 50MHz oscillator that feeds it and the MAC in the processor. The board has just failed EMC emissions at 50MHz and 100MHz which are due to the ethernet, disconnectioning but still running the 50MHz ethernet oscillator made it pass. We have the opti...

Hi Folks, I'm an engineering student trying to get started with my senior project. Basically, I want to communicate with a bunch of devices...

Hi Folks, I'm an engineering student trying to get started with my senior project. Basically, I want to communicate with a bunch of devices (and the Internet) using Ethernet. I did some research and found a few micro-controllers with built-in Ethernet capabilities. However, these require separate programmers that are quite costly. So I'm thinking of using a regular PIC chip that I can program u...

Hi, I was wondering on anyone's experiences with the new low end (i.e. 8 bit) microcontrollers with integrated ethernet. All I can think of...

Hi, I was wondering on anyone's experiences with the new low end (i.e. 8 bit) microcontrollers with integrated ethernet. All I can think of are the following: 1. eZ80 Acclaim from Zilog. 2. DS80C400 (an 8051 core) with integrated ethernet. I need to accomplish connectivity of embedded industrial devices to a LAN, but would like to eliminate the need for extra nic chips outside the micro...

Hi All, I want some guidence for encoding schemes used in ethernet I know that for gigabit ethernet mostly the 8b10b encoding scheme...

Hi All, I want some guidence for encoding schemes used in ethernet I know that for gigabit ethernet mostly the 8b10b encoding scheme is used and also I have heard about 64b/66b scheme. which one is actually used....? If I need to send my data on ethernet which one I should use and while receiving any data, is there any method for detecting that the receiving data is coded in which ...

Hi, I am testing an ethernet device on a development board, I programmed a ping echo program based on the ethernet driver, not using any...

Hi, I am testing an ethernet device on a development board, I programmed a ping echo program based on the ethernet driver, not using any IP protocol stack, but I have a hard time using the program to echo the ping from my Windows 2000 PC. From some network traffic tool I can see the ethernet frame coming to the PC and I believe the ethernet header and ICMP header are correct, but Windows ...

i have to build a weather station. the data from the sensors is to be transmitted via ethernet and IP protocols.. i couldnt really reach a...

i have to build a weather station. the data from the sensors is to be transmitted via ethernet and IP protocols.. i couldnt really reach a decision on which of these develpoment tools should i use.. or which one is better..? 1. FPGA 2. PIC18F + EN28J60+eeprom ( all from microchip) 3. microntroller with built in ethernet controller OPTION1: its a college project, so FPGA's are readily ...

I want to design a system with dual ethernet port using at91rm9200,which Ethernet chip should i choose?How to control the Ethernet chip...

I want to design a system with dual ethernet port using at91rm9200,which Ethernet chip should i choose?How to control the Ethernet chip using at91rm9200? It need work at 100Mbits/s

I need to add ethernet connectivity to my Z8encore. so I'm looking for a reliable ethernet controller chip. If anyone know about one with free...

I need to add ethernet connectivity to my Z8encore. so I'm looking for a reliable ethernet controller chip. If anyone know about one with free software tenplates, examples ect. it will be great help fore me. The CMX company http://www.cmx.com/zilog/ offer something but i think it is expensive. thanks Frank

I've searched the web and I've only found two chips that can interface with 2 ethernet ports. They are: AX88742 AX88783 On the...

I've searched the web and I've only found two chips that can interface with 2 ethernet ports. They are: AX88742 AX88783 On the manufacturer's website, they describe the 42 variant as: 32-bit PCI 2-Port 10/100M Fast Ethernet Controller And the 83 variant as: Non-PCI 8/16/32-bit 2-Port 10/100M Fast Ethernet Controller Could someone please explain to me what this...

Hi all, I am a newbie in this, so please bear with me... I was asked to estimate various options of embedding Ethernet into our future board...

Hi all, I am a newbie in this, so please bear with me... I was asked to estimate various options of embedding Ethernet into our future board level products. Here is the list of some of the requirements: a) efficient interface to either a C64x or TigerSHARC DSP b) minimum of 100BaseT, potentially 1000BaseT c) dual Ethernet capability desirable d) protocol running on external processor; e...

Can anyone help please? I want to run some 10/100 Ethernet with a rack between 8 or so boards including 1 switch device. The output from the...

Can anyone help please? I want to run some 10/100 Ethernet with a rack between 8 or so boards including 1 switch device. The output from the Ethernet devices on each of the boards is basically an MDI i.e. after the PHYs. I don't want to include magnetics due to the space requirements and no need to run any distance. It's possible to connect PHYs together but how exactly is it done. Can ...

Hello, I have a reference board that I am trying to bring up an ethernet device. I am wondering if the memory mapped io register layout...

Hello, I have a reference board that I am trying to bring up an ethernet device. I am wondering if the memory mapped io register layout for ethernet is standard? If so, what is the name of the document(s) I need for this register map? Because my question deals on wether or not mmio for ethernet is standardized, the specific chip shouldn't matter. Thanks for your time. Cheers, Pe...

I've been thinking about what kind of project I'd like to do for college next year, and I was thinking I'd go with something like a small...

I've been thinking about what kind of project I'd like to do for college next year, and I was thinking I'd go with something like a small Ethernet device. Maybe something like a "Network Mapper" which could be plugged into an Ethernet switch and would print out on an LCD screen all the IP addresses that are being used on the network. In order to do this, the only functionality I'd really ...

Hello All. I have two distant locations connected with 3-wire cable - "+", "-" and "common". Voltage 24V DC can occasionally appear between "+"...

Hello All. I have two distant locations connected with 3-wire cable - "+", "-" and "common". Voltage 24V DC can occasionally appear between "+" or "-" and "common". I have to install Ethernet communication through this cable. Modification of special Netgear "Ethernet over Power line" switch solves the problem but I have to disassemble the switch, cut and reconnect some wires. It's too di...

I'm looking for cheap (less than 5 ? at 100pieces) microcontrollers with ethernet. So far I found only the PIC18F66J60. Are there any...

I'm looking for cheap (less than 5 ? at 100pieces) microcontrollers with ethernet. So far I found only the PIC18F66J60. Are there any alternatives? Philipp

I am working on new design on the STR9 that requires Ethernet. I have very little knowledge of Ethernet, as on previous applications we...

I am working on new design on the STR9 that requires Ethernet. I have very little knowledge of Ethernet, as on previous applications we have transmitted data (in a variety of protocol formats such as Modbus, DNP3.0) serially using RS485. We are now wanting to do this over Ethernet, and there seems to be several TCP/IP stacks available. As I only require to send and receive data I was wo...

I've got a need to connect 6 ethernet devices in an embedded app. A switch isn't needed at all due to the particulars of the app. Are there...

I've got a need to connect 6 ethernet devices in an embedded app. A switch isn't needed at all due to the particulars of the app. Are there any "naked" ethernet hubs that are well suited to mounting in an enclosure? Alternativelly, is it so easy to create a hub that it could be easily laid down on the corner of a PCB? -- Alex Pavloff - remove BLAH to email Software Engineer, ESA T...

Hi All, I am very new to the Ethernet area. I am trying to design and Implement an Ethernet switch or Multiplexer. so say if I am...

Hi All, I am very new to the Ethernet area. I am trying to design and Implement an Ethernet switch or Multiplexer. so say if I am bridging between two 1-gbps channels with one 2-gbps channel. when I think of designing a TDM switch between the 2 channels of 1 gbps my basic design will contain a MAC and a FIFO right...? I was thinking that if the incoming data frame is long so that ...

Hi experts, We have to design a special device....to implement a special protocol on top of ethernet. Rabbit 4k devices look like a good...

Hi experts, We have to design a special device....to implement a special protocol on top of ethernet. Rabbit 4k devices look like a good choice, but it comes with TCP/IP stack built in. How easy it is in Rabbit 4K to get rid of the the TCP/IP stack from OS and take charge of packets arriving over ethernet. I am aware of NE2000 compatibility. Please let me know whether it will be helpf...

Hi, I have a ATMega128 and I want to connect it to internet. I want to use ENC28j60 as ethernet controller( MAC&PHY ethernet) because it...

Hi, I have a ATMega128 and I want to connect it to internet. I want to use ENC28j60 as ethernet controller( MAC&PHY ethernet) because it has SPI. I have bought a evaluation board (AT90EIT1) from Atmel and it is really a webserver and is contained ATMega103 and CS8900(an Ethernet controller)... Modular TCP/IP source code for AVR family is on CD of this evaluation board . But its ether...