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AR# 19339

CPLD XC9500/XL/XV CoolRunner-II XPLA3 - Is TDO an active driver or open drain?

Description

Is the TDO pin in Xilinx CPLDs open drain?

Solution

TDO is an active driver when in a shift state (SDR or SIR). TDO is tri-state during other operations.

AR# 19339
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article