ARM A9 Adapter board

Once you are accessing the pins what do you mean to do with them - things like DDRAM interfaces won't work with dangly wires !

These people make the sort of thing you want (I haven't checked for details)

Ironwood Electronics Adapter Technologies

or else you can make your own.  You might do better to choose  aprocessor where there is a dev board already available - playing with 624 pin BGAs is not cheap or easy.

MK

Thank you Michael for your valuable reply.........actually what we are planning is to make a microcomputer with ARM A9 as it's brain, so i cannot use a development board. We have to start from the mere processor itself, so i think the only option available for us is to go for adapter board so that the tricky part of soldering is being taken care of.

Again, thanks for the information that we cannot interface DDRAM using mere wires (i am not an expertise in such things), so i think it would be better for me to ask the help of Ironwood Electronics as you recommended.

If you can't handle the soldering of the BGA then keep away from the chip !

There are loads of ways to get an ARM 9 processor into a system without soldering the BGA - look at processor modules or one of the many ready made boards like RaspberryPi, BeagleBone etc.

Which ARM9 part are you looking at and why do you  want make your own board ?

MK

The problem with buying development boards like Pi or BeagleBone is that they are available only with inbuilt USB ports, LAN interfaces etc. We are doing a project on how to build a microcomputer using one of ARM processors, so we are not supposed to buy a microcomputer....but has to make it instead......and we are confused about whether to start from BGA or not. Hope you can help us sir .

No sir, the level of experience that we already  have is as much as designing a PCB housing a micro controller for an embedded system. And for that we have used the software Proteus 8.1 Professional.

No sir, the level of experience that we already  have is as much as designing a PCB housing a micro controller for an embedded system. And for that we have used the software Proteus 8.1 Professional.