Answers Database
 
 
 CPLD: XC9500/XL: What is the polarity for the tri-state enable for CPLDs? 
 
 Record #3194
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Problem Title: 
CPLD: XC9500/XL: What is the polarity for the tri-state enable for CPLDs?  
 
 
Problem Description: 
Urgency: Standard 
 
General Description: 
What is the polarity of the enable for the 9500/XL? 
 
 
Solution 1: 
 
The polarity of the buffer is based upon which component is 
used, either an OBUFT or OBUFE. 
 
OBUFT - tri-state buffer with active low output enable 
OBUFE - tri-state buffer with active high output enable 
 
 
 
 
 End of Record #3194 - Last Modified: 12/17/99 14:44  |