CE-ATA is a standard for connecting hard disk drives to a mainboard in consumer electronics products (hence the CE in the name). It is also known as 4x CE-ATA or 4-bit CE-ATA due to its use of just four data pins. It is designed by very small, using just a 10-pin connector. It was developed by Intel, which announced details on the standard at the Intel Developer Forum (IDF) in 2005. It is targeted at portable hardware such as digital video cameras, MP3 players and other portable media players.
With its reduction in size and pins, it is a good improvement over the CompactFlash + 50-pin connector.With a 26MB/sec (4 bit data bus) maximum transfer rate, the interface can support mobile applications handily. CE-ATA is rooted from the MMC version 4.0 specification, with new a new ATA command subset that permits random read/write access to the storage device.