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TMS570LS1227使用EMIF配置外部SRAM问题

bo xiao2
Prodigy 101 points
Other Parts Discussed in Thread: TMS570LS1227

最近项目用到TMS570LS1227的EMIF功能，第一次接触求HAL中关于SRAM配置如何配置？附件中有SRAM资料（IDT70V25）。谢谢

IDT_70V24_DST_20150831.pdf
  • 0
    Guru 42467 points

    http://e2e.ti.com/search?q=TMS570%20EMIF%20SRMA

    访问这个美国的TI论坛，

  • 0 回复 gaoyang9992006
    Guru 42467 points

    To connect an external 16bits memory with BLE/BHE for 8bits accesses, please follow this recommandation:

    EMIFADD[16:0] to SRAM_ADD[17:1]
    EMIFBADD1      to SRAM_ADD[0]
    EMIFDQM0        to SRAM_BLE
    EMIFDQM1        to SRAM_BHE

    The EMIF has to be programmed as following:

    Select Strobe = 0
    Enhanced Wait = 0
    Memory Size = 16
    SETUP Cycle Config = Slave Dependent
    HOLD Cycle Config   = Slave Dependent
    Strobe Cycle Config  = Slave Dependent

    In the TRM, the EMIF is described as 8 bits. This is not correct. The EMIF on TMS570LS series is 16bits data.

  • 0 回复 gaoyang9992006
    Prodigy 101 points

    Select Strobe = 0
    Enhanced Wait = 0
    Memory Size = 16
    SETUP Cycle Config = Slave Dependent
    HOLD Cycle Config   = Slave Dependent
    Strobe Cycle Config  = Slave Dependent

    是只需要设置这几个就好了吗？在HAL里还有其他的参数，那些不用管？

    还有我是通过CPLD来控制SRAM的，因为当时设计的时候发现控制信号数量与SRAM控制线数量不符，所以用了CPLD来中转控制，那我需要怎么设置呢？