LX2080

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LX2080

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YY2410
Contributor III

怀疑 LX2080 处理器在低温环境下通过 Norflash(NOR 闪存)加载时存在时序异常,该如何在预启动加载器(Pre-Boot Loader,简称 PBL)阶段修改 Flex SPI(灵活串行外设接口)的总线宽度、频率、时序等配置?应参考哪份文档?默认启动采用单总线加载方式 —— 切换为多总线加载能否改善该情况?

It is suspected that the LX2080 processor has timing abnormalities when loading via Norflash (NOR Flash Memory) in a low-temperature environment. How to modify the configuration of bus width, frequency, timing, etc. of Flex SPI (Flexible Serial Peripheral Interface) during the Pre-Boot Loader (PBL for short) phase? Which document should be referenced? The default startup uses a single-bus loading method—can switching to multi-bus loading improve this situation?

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June_Lu
NXP TechSupport
NXP TechSupport

刚开始时, RCW 是靠内部的bootROM加载的,默认的分频值是80,分频器件的输入时钟是system clock。 如果的system clock是100M,频率是12.5M.

PBI加载阶段也无法更改这个时钟,最早可更改在PBI中,例如:

https://github.com/nxp-qoriq/rcw/blob/45e69253690452656a4dfe933c4c9f55e1eb0f5f/lx2160ardb_rev2/XGGFF...

如果想更改宽度,也可以尝试在此设置flexSPI的LUT, 可以参考QSPI的文档.

Configure QSPI Bus Width and Frequency in Pre-Boot Loader Stage on LS Series Processors Application ...

如果是低温造成的不稳定,建议找到根本原因。因为在RCW加载阶段已经是单bit以及最慢分频时钟了。

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YY2410
Contributor III
收到,谢谢
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