Post by thread:[PIC]: AN731 released Internet connectivity etc...

Hi all, Microchip have released a new app note for Internet connectivity, this time using the Seiko S7600A TCP/IP chip and the Silicon Labs modem chipset. I've been working on both of these over the last six months and have dev kits for both. Before anyone gets too excited, there seems to be some issues with their app note. The info on their complete setup is VERY thin. If you haven't got the Silicon labs evaluation board the details they talk about will mean nothing to you. There is also an error in some of the hacks they do to the board. I'm also concerned that they are trying to run the PIC16F877 at 10 MHz with 3V. All the (preliminary) datasheets suggest that nothing below 4.0V is guaranteed to run at all. I planned to use tiny voltage level-shifting buffers in my design, running the PIC at 5.0 V and the Seiko chip at 3 V. That way it is guaranteed to work. If anyone is interested, I'll upload my version later when it is up and running. That way you'll see a proper circuit diagram, nicely commented code, PCB etc. I've been waiting for this app note for a while, but you know what they say, "if you want something done properly..." Dave -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

How to i get info on your 2 kits? AN731 - can't find on Microchip web site? Thanks Murray ----- Original Message ----- From: David Thompson <spam_OUTranma21TakeThisOuTEISA.NET.AU> To: <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> Sent: Thursday, July 06, 2000 7:46 AM Subject: [PIC]: AN731 released Internet connectivity etc... > Hi all, > > Microchip have released a new app note for Internet connectivity, this time > using the Seiko S7600A TCP/IP chip and the Silicon Labs modem chipset. I've > been working on both of these over the last six months and have dev kits for > both. > > Before anyone gets too excited, there seems to be some issues with their app > note. The info on their complete setup is VERY thin. If you haven't got the > Silicon labs evaluation board the details they talk about will mean nothing > to you. There is also an error in some of the hacks they do to the board. > > I'm also concerned that they are trying to run the PIC16F877 at 10 MHz with > 3V. All the (preliminary) datasheets suggest that nothing below 4.0V is > guaranteed to run at all. I planned to use tiny voltage level-shifting > buffers in my design, running the PIC at 5.0 V and the Seiko chip at 3 V. > That way it is guaranteed to work. > > If anyone is interested, I'll upload my version later when it is up and > running. That way you'll see a proper circuit diagram, nicely commented > code, PCB etc. > > I've been waiting for this app note for a while, but you know what they say, > "if you want something done properly..." > > Dave > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

part 1 2376 bytes content-type:text/plain; (decoded 7bit) Ooops, no I meant I own development kits, I'm not making them. Sorry for the confusion. You should be able to find the app note at the link I've attached below. Dave {Original Message removed} part 2 156 bytes content-type:application/octet-stream; (decode) part 3 142 bytes -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> Hi all, > > Microchip have released a new app note for Internet connectivity, this > time using the Seiko S7600A TCP/IP chip and the Silicon Labs modem > chipset. I've been working on both of these over the last six months > and have dev kits for both. > SNIP > > If anyone is interested, I'll upload my version later when it is up > and running. That way you'll see a proper circuit diagram, nicely > commented code, PCB etc. > > I've been waiting for this app note for a while, but you know what > they say, "if you want something done properly..." > > Dave > Have you compared using this chip to the Crystal CS8900A? -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu>

On Sat, 8 Jul 2000, Mike DeMetz wrote: > > Hi all, > > > > Microchip have released a new app note for Internet connectivity, this > > time using the Seiko S7600A TCP/IP chip and the Silicon Labs modem > > chipset. I've been working on both of these over the last six months > > and have dev kits for both. > > > SNIP > > > > If anyone is interested, I'll upload my version later when it is up > > and running. That way you'll see a proper circuit diagram, nicely > > commented code, PCB etc. > > > > I've been waiting for this app note for a while, but you know what > > they say, "if you want something done properly..." > > > > Dave > > > Have you compared using this chip to the Crystal CS8900A? I've looked at both and here are a couple of observations: 1) They cost about the same. 2) The S7600 implements TCP and UDP (and PPP), the 8900 doesn't 3) The S7600 has an RS232 interface, the 8900 has a 10-baseT interface. If you want a 10baseT interface then the 8900 is a better choice. If you need a TCP stack then the S7600 is a better choice. Many people have commented again and again that implementing a TCP stack with a pic is an arduous task - if even a possible one. I just talked to a Crystal FAE the other day and he hinted on something new that combines the functionality of the 8900 and an ARM core. It's certainly a notch above the PIC and an 8900 combo (in performance and price [actually I'm guessing on price, but I'm fairly sure I'm correct]), but it sounds attractive. Scott -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu>