The CXD1812Q/R is a CD-ROM decoder LSI with a built-in ATAPI I/F.

Features
• Compatible with CD-ROM, CD-I and CD-ROM XA formats
• Real time error correction
• Automatic multi-block transfer function
• Readable Subcode-Q data by byte from the Sub CPU
• Capable of transferring up to double speed playback and Mode2 when the 33.8688 MHz clock is used