The ddrphytune command provided by the SDK must be used to tune the DDR3 interface during production for every system that is built. This command will tune the External Packet Buffer's DDR3 interface to operate reliably over PVT for a given operating frequency. All operating frequencies require a one-time tuning. The tuned parameters can be stored to a nonvolatile memory and restored on each subsequent initialization.
Proper one-time tuning requires the following conditions to be met:
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最近在看手册看到一些说DDR在首次使用之前需要tune一下，这个tune到底tune什么东西？各个IO的延迟吗？tune这个功能是MCB做还是DDR做。哪位大神能帮忙解释一下吗？谢谢！ |
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