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SATA on OMAP-L138

Boris Ruvinsky
Expert 1410 points
Other Parts Discussed in Thread: OMAP-L138

Dear E2E:

Thank you for your help.

I need to use SATA interface on OMAP-L138.

The SATA FLASH (CFAST) card will be on the same PCB with OMAP-L138.

Due to the usage of another resources (SPI, UARTs) the SATA interface signals:

1.  SATA_MP_SWITCH - SATA mechanical presence switch input

2.  SATA_CP_DET - SATA cold presence detect input

3.  SATA_CP_POD - SATA cold presence power-on output

4. SATA_LED - SATA LED control output

These four SATA interface signals are not available for SATA interface in my current design.

1.  Will SATA interface function correctly without these four signals?

2.  The DS page147 (SPRS586D) Figure 5-30 shows SATA interface Schematic without all four above signals.

3.  What "cold SATA" means?

Thank you for your help,

Boris Ruvinsky

  • 0
    TI__Mastermind 27585 points

    No these pins are not required. The LogicPD EVM does not use any of those 4 signals in its design and SATA is still fully functional under Linux.

    I can give you a better definition of what the cold presence function is shortly.

    Jeff

  • 0 in reply to jc-ti
    TI__Mastermind 27585 points

    The cold presence is to detect if a drive has been plugged in but not yet powered. This can be used to have the power-on output turn on power to the SATA device once it has been plugged in.

    Jeff