This mode is selected by configuring SDRAMC_LPR.LPCB to 2. Power consumption is greater than in Self-refresh mode. All the input and output buffers of the SDRAM device are deactivated except SDCKE, which remains low. In contrast to Self-refresh mode, the SDRAM device cannot remain in Low-power mode longer than the refresh period (64 ms for a whole device refresh operation). As no autorefresh operations are performed by the SDRAM itself, the SDRAMC carries out the refresh operation. The exit procedure is faster than in Self-refresh mode.
Refer to the following figure.
Figure 1. Low-power Mode Behavior
