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Dear Ti Teams:
I'm using DM3730 platform in my project, and the DM3730‘s GPMC port have connected to FPGA, Nor flash ,nand flash,
the GPMS function sometimes downloading image to Nor flash speed very slow, could you please provide the GPMC interface's layout guide to me,
we need go through some check, thanks.
Best Regards~
Frank
Nor flash速度本来就很慢的,您可以看一下Nor flash芯片数据手册里的读写时间。
对于GPMC来说,对nor flash布线没有特殊的要求。请看附件TI wiki网站上的schematic checklist.
DM3730 schematic checklist.zip
Hi Shine,
we have the DM3730 schematic checklist but it no too much introductions for GPMC part, for the norflash ,the programming time for normally PCB board about 30s, the slow one will be about 70~80s , we have test the two PCB board , there is not significant different ,current ,volage, pin impendance,functions
but, part of board have slow burning speed will pull down manufacturer efficiency,
we just need the general GPMC port some guide documents , even other CPU platform will be ok,thanks.
BR~
Frank
对于nor flash,在pcb layout上没有特殊的要求。
请看一下GPMC寄存器setup/strobe/hold时间的配置。另外,可以考虑用EDMA搬移来加速数据读写。
hi Shine:
GPMC 总线我们测试对烧写速度慢的板子信号质量是有点差别的,EDMA现有CPU不支持,I2C都有一些layout指导,GPMC总线也可以跑高速了,请帮忙在找找layout 规则 和Nor flash关联不大也可以,谢谢。
抱歉,没找到GPMC nof flash pcb layout的文档。有关DM3730 pcb布线的文档,都在下面的网站上。
https://www.ti.com/product/DM3730#tech-docs
另外,看一下下面的帖子是否有帮助。
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/438926/pcb-layout-care-for-designing-a-custom-nor-cape-with-beagle-bone-black
hi Shine:
另外您推荐的 https://www.ti.com/product/DM3730#tech-docs 很多文档都找不到 显示找不到链接,如果可以请提供一份 DM3730的layout指导文档,谢谢。