Routing ispLattice chips

[Den]

Hi,
I'm routing a board with some ispLattice chips on. Those chips come with
2 GND pins, and 2 VCC pins. Do I need to route the four pins, instead of
just one GND and one VCC ?

Thanks in advance,
Den

 

[colin_toogood@yahoo.com]

Take a look at the virtex 5 FPGAs from xilinx. About one pin in four is
a gnd. There are very good reasons for this

colin


Den wrote:

Hi,
I'm routing a board with some ispLattice chips on. Those chips come with
2 GND pins, and 2 VCC pins. Do I need to route the four pins, instead of
just one GND and one VCC ?

Thanks in advance,
Den

 

[Leon]

Den wrote:

Hi,
I'm routing a board with some ispLattice chips on. Those chips come with
2 GND pins, and 2 VCC pins. Do I need to route the four pins, instead of
just one GND and one VCC ?

Thanks in advance,
Den

They are both needed.

I would give each pair its own decoupling capacitor.

Leon