Toshiba’s new 'Supreme+' e•MMC (JEDEC ver. 5.1) memories are available in capacities from 16GB to 128GB and are based on 15nm MLC NAND flash technology. Sequential read and write speeds of 320MB/s and 180MB/s are around 2% and 20% faster than the read and write speeds of Toshiba’s previous devices. Also, random read and write speeds are about 100% and 140% higher than previous devices.
While e•MMC reaches a theoretical limit with an 8bit parallel interface of 400MB/s, UFS memory extends interface performance through high-speed differential signaling using the MIPI M-PHY interface. This results in a theoretical performance of 1166MB/s by supporting a two-lane MIPI M-PHY HS-G3 interface.
The new UFS (JEDEC ver 2.1) devices are also based on 15nm MLC NAND flash technology and are availablke in capacities ranging from 32GB to 128GB. Compared to previous devices sequential read and write speeds of 850MB/s and 180MB/s represent improvements of around 40% and 16%. Also, random read and write performances are about 120% and 80% higher, respectively.
Toshiba manufactures both the flash memory and the controller technology deployed in its e.MMC and UFS memory devices. The company also developed in-house the analogue M-PHY 3.0 core and digital UniPro 1.6 core that are integrated with the new UFS controller.