eMMC 5.1 Nex Bus Driver is a production-ready software stack for eMMC 5.1 Host Controller IP that is used to connect eMMC devices. The eMMC 5.1 stacks can also be used for validating a device during its development and integration life cycles thereby helping designers to reduce the time to market for their product. The modular neX+ stack is architected to be OS and platform independent which eases porting effort. It has thin OS and hardware abstraction layers making it highly portable. The neX+ stack provides a generic API set to access, control and configure the bus driver, host controller driver, and the underlying hardware.
The eMMC 5.1 software stack includes functions for initialization, sending of commands, data transfer, power management, bus configuration, client driver matching, host controller hardware configuration, and shutdown. The neX+ stack can support a single host controller with multiple slots or multiple host controllers with multiple slots. The software stack complies with the latest eMMC standards. It supports eMMC cards with the option for a device to boot directly from these cards using the boot mode feature.
Compliant with eMMC Specification Version 5.1
Backward Compatible to eMMC 4.x
HS400:High Speed DDR mode at 200MHz
Field Firmware Update
Production State Awareness
Device Health Report
Sleep Notification in PowerOff notification
Hardware& Device Initialization
Card Register Read/Write
Bus Width Switching
Bus Speed Switching
Packed Read / Write Commandsv
Boot Partition and User Data Partition
Multiple Block Operations
Source code in c language for application processor eMMC Firmware Driver
Validate and test the device during development.
Silicon vendors can use the driver to create a reference system design for their customers
Arasan’s general purpose I/O PADs are multipurpose PADs that can be programmed to operate in different modes: 1) Output with predetermined source/sink impedance, 2) Open drain, 3) Input, 4) Tristate and 5) Weak pull up or pull down. The I/O PADs are specially designed to seamlessly integrate with Arasan’s eMMC 5.1 and eMMC 5.0 host controller IP. Arasan introduced the industry’s first HS400PHY in 2013 on multiple nodes and since then the engineering team has been working diligently to keep up with the latest versions.