1. Xilinx -灵活应变. 万物智能.
  2. 技术支持
  3. AR# 45721: MIG 7 Series (all designs) - System/Reference Clock pins not selectable in two bank Zynq devices

AR# 45721

MIG 7 Series (all designs) - System/Reference Clock pins not selectable in two bank Zynq devices

描述

Certain Zynq devices have onlytwo banks. When both of the banks are selected for memory pins, there will be no banks available to allocate System Control or Reference clock pins. For this reason, pins are not shown for System Control and Reference Clock. When designs are implemented without allocating pins, the design fails during Map because no pins are available for System Control and Reference Clock pins.

解决方案

Youneed to either target a smaller design such that an empty bank is available for System Control and Reference Clock pins, or use a voltage standard for System Control and Reference Clock that are compatible with the I/O standard used for the memory interface.

For information on 7 Series I/O standard compatibility, see the7 Series SelectIO Resource User Guide (UG471):
http://www.xilinx.com/support/documentation/user_guides/ug471_7Series_SelectIO.pdf

NOTE: LVDS inputs do not require a specific Vcco levelprovided that recommended operating conditions are metand DIFF_TERM =FALSE.Internal termination, (i.e., DIFF_TERM=TRUE), is only supported on 1.8v HP banks or 2.5v HR banks)

AR# 45721
日期 10/11/2012
状态 Active
Type 已知问题
器件
IP