AR# 51778

Zynq-7000 - How should the PS DDR3 CKE signal be terminated?

描述

How should the PS DDR3 CKE signal be terminated?

解决方案

For DDR3, CKE should be pulled to VTT via a 40 Ohm resistor, not pulled to GND via 4.7 KOhm as is used in DDR2. 

This provides termination for CKE for self-refresh operations.

The Zynq-7000 SoC PCB Design and Pin Planning Guide (UG933) has been updated with this information.

链接问答记录

主要问答记录

Answer Number 问答标题 问题版本 已解决问题的版本
52540 Zynq-7000 SoC - Frequently Asked Questions N/A N/A
AR# 51778
日期 05/17/2018
状态 Active
Type 综合文章
器件
Boards & Kits