Fusion and ProASIC3E I/O standards compatibility matrix

The following table displays all of the I/O standards available for Fusion and ProASIC3E devices. Not all I/O standards are compatible with each other. Two I/O standards are compatible if they have identical VCCI values and if both of them need a VREF and their VREF values are identical.

Use the table below to determine which I/O standards are compatible with which for your device.

I/O Standard

LVTTL

LVCMOS 3.3

LVCMOS 2.5

LVCMOS 2.5/

5.0

 

LVCMOS 1.8

LVCMOS  1.5

PCI,

PCIX

GTL+ 3.3

GTL+

2.5

GTL

3.3

GTL

2.5

HSTL

Class

I  

HSTL

Class

II

SSTL2

Class

I and II

SSTL3

Class

I and II

LVDS

LVPECL

LVTTL

X

X

 

 

 

 

X

X

 

X

 

 

 

 

X

 

X

LVCMOS 3.3

X

X

 

 

 

 

X

X

 

X

 

 

 

 

X

 

X

LVCMOS 2.5

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

LVCMOS 2.5/5.0

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

LVCMOS 1.8

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

LVCMOS 1.5

 

 

 

 

 

X

 

 

 

 

 

X

X

 

 

 

 

PCI, PCIX

X

X

 

 

 

 

X

 

 

X

 

 

 

 

X

 

X

GTL+ 3.3

X

X

 

 

 

 

 

X

 

X

 

 

 

 

X

 

X

GTL+ 2.5

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

GTL 3.3

X

X

 

 

 

 

X

X

 

X

 

 

 

 

X

 

X

GTL 2.5

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

HSTL

Class I

 

 

 

 

 

X

 

 

 

 

 

X

 

 

 

 

 

HSTL

Class II

 

 

 

 

 

X

 

 

 

 

 

 

X

 

 

 

 

SSTL2 Class I and II

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

SSTL3 Class I and II

X

X

 

 

 

 

X

X

 

 

X

 

 

 

X

 

X

LVDS

 

 

X

X

 

 

 

 

X

 

X

 

 

X

 

X

 

LVPECL

X

X

 

 

 

 

X

X

 

X

 

 

 

 

X

 

X