AR# 11508

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dup to soln 993

描述

Keywords: Virtex-II, JTAG, TAP, reset, PROG, program, pin

Urgency: Standard

General Description:
In Virtex and Virtex-E devices, the Program pin resets the TAP controller. Does this happen with Virtex-II devices?

解决方案

No, the Program pin does not reset or hold in reset the TAP controller for Virtex-II devices. JTAG is available even when the program pin is held Low.

To bring the TAP state back to Test Logic Reset, simply hold TMS high for five TCK cycles.

However, some instructions, such as "Program" and "Verify", are not available when the Program pin is held Low.
AR# 11508
日期 09/30/2008
状态 Archive
Type 综合文章
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