The TWL92230 is an energy management device optimized to be a companion device for the OMAP24xx application processor. It contains power supplies and reference voltage for OMAP24xx (VCORE, VIO, VADAC, VPLL, and a 0.5-V reference), for associated memory (VMEM), for two independently powered memory cards (VMCS1 and VMCS2) and also for an extra device or auxiliary peripheral (VAUX). It contains all relevant interface signals to OMAP24xx, that allow monitoring, operation control, and changing of regulator voltage settings via the I2C serial interface. The TWL92230 also has memory card transceivers to adapt a 1.8-V processor I/O voltage to the memory card voltages. It supports two slots for MMC, SDIO, SD, or Memory Stick cards.