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AR# 1356

Configuration 4000/5000 - Can TDI, TCK, TMS and TDO be connected to a user signal and BSCAN?

Description

The TAP pins of the XC4000e/ex/xl/XC5200 can be used for user I/O. Some users, because of limited pin resources, may want to use the TAP pins connected to a user signal and the BSCAN component. Is this possible?

解决方案

If Boundary Scan is not enabled (the BSCAN macro is not instantiated), then TDI, TCK, and TMS can be used as I/O pins and TDO can be a 3-stateable output available after configuration. The TAP pins cannot be used for both a user I/O and connected to the BSCAN component at the same time.

AR# 1356
创建日期 08/21/2007
Last Updated 12/15/2012
状态 Active
Type 综合文章