On Wed, Feb 19, 2014 at 10:10 AM, Luc Verhaegen <l...@skynet.be> wrote: > On Wed, Feb 19, 2014 at 09:11:52AM -0500, jonsm...@gmail.com wrote: >> On Wed, Feb 19, 2014 at 7:13 AM, Luc Verhaegen <l...@skynet.be> wrote: >> > On Tue, Feb 18, 2014 at 03:35:13PM -0500, jonsm...@gmail.com wrote: >> >> On Tue, Feb 18, 2014 at 3:09 PM, Andre Renaud <an...@bluewatersys.com> >> >> wrote: >> >> > Hi, >> >> > Does anyone know of a reliable supplier who sells the AllWinner A20 >> >> > chips? I was hoping to find them on digikey, mouser or avnet, but it >> >> > appears that they're a little bit hard to find. I see that Olimex will >> >> > sell them in low volumes, but I was hoping for a better known supplier >> >> > (and higher quantities). >> >> >> >> Allwinner is talking with the big distributors currently but AFAIK no >> >> deal has been reached yet. >> >> >> >> Many people have designed their own board locally using a few chips >> >> from Olimex. Then when you want to make a larger quantity have them >> >> assembled in Shenzhen. The Allwinner chips are plentiful in Shenzhen. >> >> >> >> Instead of buying chips you might want to consider standard Q88 tablet >> >> PCBAs. A20 tablet PCBAs can be bought in the $20-30 range in Shenzhen. >> >> An easy way to get a hold of them is to buy Q88 tablets and >> >> disassemble them. These PCBA are made by many companies and the price >> >> is highly competitive. It is also possible to buy STB PCBAs. >> >> >> >> Another option is to have a Chinese design house make one for you. For >> >> about $5000 they will design whatever you want and provide about ten >> >> prototype boards. These designs are easy to put into production since >> >> they will use local components. Around $40/board for medium volume but >> >> this depends on what you put on the board. >> >> >> >> Reusing Q88 PCBAs is by far the easiest solution. You can mount one in >> >> a case and then use an internal USB cable to talk to your specialized >> >> hardware if needed. >> > >> > Isn't Q88 an A13 based board? >> >> Q88 is just the design dimensions. Most Q88 format boards are A13 but >> some are A10, A20 and A23. > > Oh, i see, this is new info to me.
There are some other standard formats. One is a thick L shaped, and other is L-shaped with a thin neck. They have Qxx names too but I don't know what they are. There is one group of companies making PCBAs in these standard formats. The location of the LCD/CSI/etc connectors are also standardized. Another group assembles tablets designed around these standard PBCAs. This model lets the PBCA vendors sell to multiple customers and the assembler to have multiple suppliers. I don't think there are any written specs for this, it just seems to have evolved that way. Of course nothing stops you from doing complete custom either. > > Maybe this should be documented on our wiki, as we have plenty of Q88 > lookalike devices in at least our A13 tablets. > > Luc Verhaegen. > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. -- Jon Smirl jonsm...@gmail.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
