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2005-07-09 by varuzhandanielyan
Does anybody succeeded with design of two layer PCB with LPC2138 or similar chip? There was an opinion on this forum, that at least 4 layers are necessary. But such an approach is highly decreasing the advantage of the low cost of the LPC2000 series. Varuzhan
2005-07-09 by Digital Systems, Partner
I am working with single layed board @24MHz on LPC2132. NO prob;em Vimal Amin
2005-07-09 by valdef78
--- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@x> wrote: > Does anybody succeeded with design of two layer PCB > with LPC2138 or similar chip? > There was an opinion on this forum, that at least 4 > layers are necessary. > But such an approach is highly decreasing the advantage > of the low cost of the LPC2000 series. > > Varuzhan why not ?? here is a two layer example : http://www.geocities.com/leon_heller/lpc2104.html as for any high speed mcu, you should be careful at the way you route your board, but I don't see why it couldn't be possible with LPC..
2005-07-09 by sudip nag
Hi Varuzhan,
I have tested LPC2138 both in single layer and double layer PCB. In double layer I had run it at 55.296MHz cclk. It was absolutely reliable. 4 layer and above PCBs are recommended for highly sophisticated designs. Its always preferable to use multilayer PCBs, but compromise between high performance and low cost is always there.
Sudip
varuzhandanielyan <dan@...> wrote:
Does anybody succeeded with design of two layer PCB
with LPC2138 or similar chip?
There was an opinion on this forum, that at least 4
layers are necessary.
But such an approach is highly decreasing the advantage
of the low cost of the LPC2000 series.
Varuzhan
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[Non-text portions of this message have been removed]2005-07-09 by Leon Heller
----- Original Message -----
From: "varuzhandanielyan" <dan@...> To: <lpc2000@yahoogroups.com> Sent: Saturday, July 09, 2005 4:48 AM Subject: [lpc2000] Two layer PCB and LPC2000 > Does anybody succeeded with design of two layer PCB > with LPC2138 or similar chip? > There was an opinion on this forum, that at least 4 > layers are necessary. > But such an approach is highly decreasing the advantage > of the low cost of the LPC2000 series. With careful layout two layers are OK, as with most microcontrollers. It will be difficult to meet EMC requirements with two layers, however, and four layers are probably mandatory for a product that is to be sold in Europe. Leon -- Leon Heller, G1HSM leon.heller@... http://www.geocities.com/leon_heller -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.11/44 - Release Date: 08/07/2005 --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]
2005-07-09 by Boris Králik
I am working with fourth layer board. More spaces for ground and power supplies. BorisK --- varuzhandanielyan <dan@...> wrote: > Does anybody succeeded with design of two layer PCB > with LPC2138 or similar chip? > There was an opinion on this forum, that at least 4 > layers are necessary. > But such an approach is highly decreasing the > advantage > of the low cost of the LPC2000 series. > > Varuzhan > > > > Regards / S pozdravom Boris Kralik http://www.geocities.com/kralikbo/ ------------------------------------------------- ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com
2005-07-09 by Gus
All our boards are 2 layers!!! www.ghielectronics.com --- In lpc2000@yahoogroups.com, "valdef78" <valdef@s...> wrote: > --- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@x> wrote: > > Does anybody succeeded with design of two layer PCB > > with LPC2138 or similar chip? > > There was an opinion on this forum, that at least 4 > > layers are necessary. > > But such an approach is highly decreasing the advantage > > of the low cost of the LPC2000 series. > > > > Varuzhan > > why not ?? > > here is a two layer example : > http://www.geocities.com/leon_heller/lpc2104.html > > as for any high speed mcu, you should be careful at the way you route > your board, but I don't see why it couldn't be possible with LPC..
2005-07-09 by tonalbuilder2002
> But such an approach <4 layer> highly decreasing the advantage > of the low cost of the LPC2000 series. Almost any board can be laid out with just 2 layers if you have enough room. But keep in my mind that is it possible to make a 4 layer board a lot smaller than the same board as a 2 layer, since you don't have to leave room for power traces. Also, it usually takes less time to lay out a 4 layer board which may affect economies on small runs. Keep down the cost of 4 layer boards by "panelizing" them. Place a matrix of small boards on the most economical large board size your supplier offers, then cut them apart with a band saw. Most layout software packages have a panelizing feature or macro. Place long XY traces on the panelized board to guide the cuts, then smooth the cut edges with sandpaper. Bill T. http://www.kupercontrols.com
2005-07-10 by Charles Manning
On Saturday 09 July 2005 15:48, varuzhandanielyan wrote: > Does anybody succeeded with design of two layer PCB > with LPC2138 or similar chip? > There was an opinion on this forum, that at least 4 > layers are necessary. > But such an approach is highly decreasing the advantage > of the low cost of the LPC2000 series. If you are using a system where your memory bus is going out of the chip to access other chips, then a 4 layer board is a good idea. With single-chip systems all the real fast stuff is happening inside the chip and there is no real need for a 4 layer board.
2005-07-11 by Jack Yu
All our boards are 2 layers andwith gsm/cdma module. JackYu 2005/7/11 --------------------------------- Sell on Yahoo! Auctions - No fees. Bid on great items. [Non-text portions of this message have been removed]
2005-07-11 by Grzegorz
Our design - smart card reader, based on LPC2104/6, failed with 2- layer pcb. High voltage spikes (although with proper ESD guarding/decoupling on socket/MCU side) sometimes generated processor exceptions. 4-layer pcb completely solve this problem. Similar design (also on '2106), operated inside high electromagneic field (RFID reader), is comercially produced on 2-layer pcb, with no afford. So, question - 2 or more layers for LPC, strongly depends of target application. My 'home made' LPC starter kit was single layer pcb and worked perfectly ... Grzegorz --- In lpc2000@yahoogroups.com, Jack Yu <jack_pku@y...> wrote:
> > All our boards are 2 layers andwith gsm/cdma module. > > > > JackYu > > 2005/7/11 > > > > --------------------------------- > Sell on Yahoo! Auctions - No fees. Bid on great items. > > [Non-text portions of this message have been removed]