The following table shows which I/O attributes apply to which I/O standards for Axcelerator devices. Not all I/O attributes are applicable for all I/O standards. Also, some attributes are preset and cannot be changed. Therefore, use the table below to determine which I/O attributes you can modify per I/O standard for your device.
|
I/O Standard |
Output Drive |
Slew |
Resistor Pull |
In_delay (input only) |
Output Load |
Use |
|
LVTTL |
X |
X |
X |
X |
X |
X |
|
LVCMOS 2.5 |
|
|
X |
X |
X |
X |
|
LVCMOS 1.8 |
|
|
X |
X |
X |
X |
|
LVCMOS 1.5 |
|
|
X |
X |
X |
X |
|
PCI |
|
|
|
X |
|
X |
|
PCIX |
|
|
|
X |
|
X |
|
GTL+ 3.3 |
|
|
|
|
|
X |
|
GTL+ 2.5 |
|
|
|
|
|
X |
|
HSTL Class I |
|
|
|
|
|
X |
|
SSTL2 Class I and II |
|
|
|
|
|
X |
|
SSTL3 Class I and II |
|
|
|
|
|
X |
|
LVDS |
|
|
|
|
|
X |
|
LVPECL |
|
|
|
|
|
X |