SPRSPA7C September 2024 – July 2025 AM2612 , AM2612-Q1
PRODUCTION DATA
OSPI offers two data capture modes, PHY mode and Tap mode.
PHY mode uses an internal reference clock to transmit and receive data via a DLL based PHY, where each reference clock cycle produces a single cycle of OSPI_CLK for Single Data Rate (SDR) transfers or a half cycle of OSPI_CLK for Double Data Rate (DDR) transfers. PHY mode supports three clocking topologies for the receive data capture clock. Internal PHY Loopback - uses the internal reference clock as the PHY receive data capture clock. Internal Pad Loopback - uses OSPI_LBCLKO looped back into the PHY from the OSPI_LBCLKO pin as the PHY receive data capture clock. DQS - uses the DQS output from the attached device as the PHY receive data capture clock. SDR transfers are not supported when using the Internal Pad Loopback and DQS clocking topologies. DDR transfers are not supported when using the Internal PHY Loopback or Internal Pad Loopback clocking topologies.
Tap mode uses an internal reference clock with selectable taps to adjusted data transmit and receive capture delays relative to OSPI_CLK, which is a divide by 4 of the internal reference clock for SDR transfers or a divide by 8 of the internal reference clock for DDR transfers. Tap mode only supports one clocking topology for the receive data capture clock. No Loopback - uses the internal reference clock as the Tap receive data capture clock. This clocking topology supports a maximum internal reference clock rate of 200MHz, which produces an OSPI_CLK rate up to 50MHz for SDR mode or 25MHz for DDR mode.
OSPI PHY Mode defines timing requirements and switching characteristics associated with PHY mode and OSPI Tap Mode defines timing requirements and switching characteristics associated with Tap mode.OSPI Timing Conditions presents timing conditions for OSPI.
For more information, see Octal Serial Peripheral Interface (OSPI) section in the device TRM.