The R5C843 is a single chip solution offering six PCI functions (PCI bus bridge to a PC Card, an IEEE1394, an SD Card, a MultiMediaCard, a Memory Stick and an xD Picture Card) with an ExpressCard (USB Interface Type) switch. The R5C843 supports almost all the Flash Memory Cards currently in the market, allowing system designers to flexibly configure systems necessary to interface with multiple Flash Memory Cards.
The R5C843 newly supports a High Speed MMC that is compliant with the MultiMediaCard Specification Version 4.1. The High Speed MMC features 8-bit parallel data transfer at 52MHz.