AR# 52183

ISE / 7 Series - ODELAY component functional delay modeling

描述

In ISE simulation for 7 series ODELAY component, tap delay in FIXED mode is not correctly shown.

解决方案

In 7 series Devices, the ODELAY component has a number of parts to the delay that are modeled in functional simulation.

The first part of the delay is the insertion delay which is a fixed delay of the ODELAY component.

This delay is fixed regardless of the tap setting. The delay of this portion is 600ps in the 7 series devices.

The second part of the delay is a per-tap delay which models the total delay through the component in FIXED mode.

This delay is a linear function of the TAP setting multiplied by the per-tap-delay.

Note: In the ISE software up to and including 14.3 the ODELAY per-tap delay component is not modeled correctly, and only the insertion delay is seen.

This issue is fixed in the 14.4 release.

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AR# 52183
日期	07/29/2014
状态	Active
Type	综合文章
器件	Artix-7 Kintex-7 Virtex-7
Tools	ISE Design Suite - 14.1 ISE Design Suite - 14.2 ISE Design Suite - 14.3

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