Re: my Spartan-4 wishlist

On 5 Mrz., 05:45, rickman <gnu...@xxxxxxxxx> wrote:
On Mar 3, 4:42 pm, Antti <Antti.Luk...@xxxxxxxxxxxxxx> wrote:



On 3 Mrz., 22:16, DJ Delorie <d...@xxxxxxxxxxx> wrote:

Antti <Antti.Luk...@xxxxxxxxxxxxxx> writes:
2) devices packages like Spartan-3E (including QN132 !) or better
(microBGA 6x6 mm?)

I keep wondering if there's a market for a few "unbalanced" devices,
like something with a ton of gates but in a tqfp-64 package. Or BGA
packages that only use the two outer rows for signals, for simpler
board routing.

Likewise, I'd like to see the occasional MCU with a ton of ram and a
little flash, rather than the other way as it usually is. Every once
in a while I need a smart buffer chip :-(

oh yes, TQFP48 0.5mm pitch FPGA running from single voltage!
defenetly, but hey thats wish for new Lattice device ;)

BTW, Actel QFN132 3 row QFN 0.5mm pitch CAN be used on
2 layer PCB or even single layer.

Antti

I have not looked very hard at the 132 pin QFN package. But at 0.5 mm
pin pitch, how exactly do you route signals from the middle row out?
I guess the pins are actually 1.5 mm pitch on each row for 0.5 mm
considering all three rows? One of the problems I have using 0.65 mm
pitch QFPs is that I can't route between the pins. That is a real
PITA. I sometimes think I would be better off with a wider pitch
part, but I'm not sure I can fit them on the board... :^(

its 0.5mm pitch.
middle row pins can not be used on 2 layer PCB
only outer and inner row. my application did not
need much IO so that was sufficient

Antti
.

Relevant Pages

  • Re: my Spartan-4 wishlist
    ... how exactly do you route signals from the middle row out? ... I guess the pins are actually 1.5 mm pitch on each row for 0.5 mm ... middle row pins can not be used on 2 layer PCB ...
    (comp.arch.fpga)
  • Re: my Spartan-4 wishlist
    ... how exactly do you route signals from the middle row out? ... I guess the pins are actually 1.5 mm pitch on each row for 0.5 mm ... middle row pins can not be used on 2 layer PCB ...
    (comp.arch.fpga)
  • Re: my Spartan-4 wishlist
    ... TQFP48 0.5mm pitch FPGA running from single voltage! ... I have not looked very hard at the 132 pin QFN package. ... how exactly do you route signals from the middle row out? ...
    (comp.arch.fpga)
  • Re: this is getting crazy
    ... FPGAs, told him which pins were unassigned i/os, which ram pins he ... connectors to make the layout as easy as possible. ... physical flow of signals on the board. ... signal flow than a smaller package. ...
    (sci.electronics.design)
  • Re: Are Simms still available???
    ... It can use combo of 1 meg and/or 4 meg simms ... Single Inline Pin Package and were only seen on the early 30 pin type ... they were actually SIMM's with pins soldered to the ... DIP chips used in the 64 for DRAM? ...
    (comp.sys.cbm)