On Mon, 11 Mar 2002 02:06:56 -0500 rm <[EMAIL PROTECTED]> wrote: > On Mon, Mar 11, 2002 at 05:08:15PM +1100, Erik de Castro Lopo wrote: > > On Mon, 11 Mar 2002 00:58:17 -0500 > > rm <[EMAIL PROTECTED]> wrote: > > > > > On Mon, Mar 11, 2002 at 03:08:39PM +1100, Erik de Castro Lopo wrote: > > > > Hi People, > > > > A good example of this is the PLX iop480 > > > > (see link [1] below), a 32 bit PPC core which can connect directly > > > > to the PCI bus. Connected to this processor are however many serial > > > > UARTs are required for the Midi I/Os. > > > > > > just out of curiosity, have you seen an example layout with the pqfp > > > part done in 4 layers or less? they don't specify in the HDK > > > datasheet. > > > > The PQFP is a surface mount device so there are no layers. I also > > think it is a standard package but I'm not sure where to get the > > footprint. I've been away from hardware design for almost two > > years :-) > > noononno, :D > i meant a pcb that has 4 or fewer layers and uses the pqfp part.
Whoops :-). I haven't looked at the layout of the RDK but it is a PCI design and from memory the PCI spec recommends a six layer board when both 3.5 and 5 volts are required as the the case here. Erik -- +-----------------------------------------------------------+ Erik de Castro Lopo [EMAIL PROTECTED] (Yes it's valid) +-----------------------------------------------------------+ "Anyone who says you can have a lot of widely dispersed people hack away on a complicated piece of code and avoid total anarchy has never managed a software project." - Andy Tanenbaum in 1992 on comp.os.minix
