TMS570LC4357: SDRAM refresh commands

Hello,
SLFR command will put attached SDRAM device into Slef-refresh mode. In this mode consumption of power is minimal. The self-refresh mode is effective when not accessing the device for a long time although the data must be held. In self refresh mode, the SDRAM disables the internal clock and all the input buffers except CKE. The refresh addressing and timing are internally generated to reduce power consumption.

Auto refresh is a command that refreshes DRAM. An SDRAM device requires that each of its rows be refreshed at a minimum required rate. The EMIF can meet this constraint by performing auto refresh cycles at or above this required rate. An auto refresh cycle consists of issuing a PRE command to all banks of the SDRAM device followed by issuing a REFR command.

Best regards,
Miro