Answers Database
LogiCORE PCI32 4000/Spartan: Should i/o's be set to TTL or CMOS for the 4KXLT or Spartan device?
Record #1229
Product Family: Software
Product Line: LogiCore
Product Part: PCI Initiatior
Problem Title:
LogiCORE PCI32 4000/Spartan: Should i/o's be set to TTL or CMOS for the 4KXLT or Spartan
device?
Problem Description:
Urgency: Standard
General Description:
Should i/o's be set to TTL or CMOS for the PCI core?
Solution 1:
We recommend use of the TTL levels on the input and output
for 5V PCI.
The PCI specs says:
The 5V environment [what we currently support] is based on
absolute switching voltages in order to be compatible with
TTL switching levels.
End of Record #1229 - Last Modified: 10/01/99 14:19 | 
