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  1. Embedded Software & Tools
  2. EXT_EP-11851

emmc: HS200 speed mode is running at 100MHz frequency

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: High High
    • PDK
    • PDK-14147
    • PROCESSOR_SDK_09.01.00
    • PROCESSOR_SDK_10.00.00
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      j721e-evm
      j721e-hsevm
      j721e-hsfs-evm
      j7200-evm
      j7200-hsevm
      j7200-hsfs-evm
      j721s2-evm
      j721s2-hsevm
      j721s2-hsfs-evm
      j784s4-evm
      j784s4-hsevm
      j784s4-hsfs-evm
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      j721e-evm j721e-hsevm j721e-hsfs-evm j7200-evm j7200-hsevm j7200-hsfs-evm j721s2-evm j721s2-hsevm j721s2-hsfs-evm j784s4-evm j784s4-hsevm j784s4-hsfs-evm

      Description
      Current eMMC driver gives 100MHz output in HS200 speed mode instead of 200MHz and there is degradation in  performance.

      Resolution
      Fixed the divider value calculation in eMMC driver.

      Root Cause

      • Divisor calculation is not correct in case of HS200 and divisor value to set as 0x2 (0x01 register value).
      • Hence HS200 speed mode produced 100 MHz output instead of 200MHz.

            syncuser TI User
            syncuser TI User
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              Created:
              Updated:
              Resolved: