Ricoh R5C811

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Ricoh R5C811

This is a Ricoh combined Cardbus, FireWire, SD, SDIO and MMC controller.


  • CardBus controller
    • PCI ID: 1180:0476
  • IEEE1394 (FireWire)
    • PCI ID: 1180:0552
    • PCI ID: 1180:0822

CardBus Linux support

This chip emulates the older Ricoh R5C476-II for CardBus functionality.

This function is supported by recent 2.4 and 2.6 kernels

FireWire Linux support

Not all ThinkPads with this chip have the FireWire function enabled, so if you don't have the FireWire ports, you will not see it listed in lspci either.

support unknown

SD/SDIO/MMC support

This function is only supported on the X41 and X41 Tablet ThinkPads. Other ThinkPads with this chip have the SD/SDIO/MMC function disabled, so if you will not see it listed in lspci.

This function is not currently supported, see the SD Card slot page for more info.

ThinkPads this chip may be found in