General Information about eMMC:
Automotive eMMC is an embedded non-volatile memory system comprised of both flash memory and a flash memory controller that simplifies application interface design and frees the host processor from low-level flash memory management. It is designed for a wide range of applications in consumer electronics, cars, industrial computers, navigational systems, and other industrial uses, including routers. This assists product developers by simplifying the non-volatile memory interface design and qualification process, reducing time-to-market, and making future flash device offers easier to support. eMMC is a feasible, low-cost memory solution for mobile and other space-constrained products due to its small BGA package sizes and low power consumption. These devices either don't require or can't accommodate an SSD. As a result, Automotive eMMC is a fantastic option.
What is eMMC in the automotive sector?
Detail 3D maps, traffic monitoring, meteorological information, car radio, satellite radio, E-call, speech recognition, and multimedia are all possible with automotive eMMC memory. It is a compact storage device made consisting of NAND flash memory and a simple storage controller is known as an embedded MultiMediaCard (eMMC). JEDEC and the MultiMediaCard Association created the eMMC standard for embedded flash memory applications in 2006. The MMC card gave birth to eMMC. MMC cards are no longer extensively used and have been superseded by SD (Secure Digital) cards. SD and MMC cards have a lot in common. Originally, the MMC card featured a 1-bit data bus, however, it was upgraded to an 8-bit bus. The bus on the SD card is up to 4 bits wide. During the initialization step of power-up, the host can configure the actual bus width in use for both cards. The host can choose between 1, 4, or 8-bit wide bus operation. The Card uses a customizable number of data bus signals to convey data. (1, 4, or 8 bits of data). This is decided at the initialization step of the power-up.
The main storage for portable devices like cell phones and tablets is often an eMMC. These devices have the capability to expand their storage capacity by adding a detachable Secure Digital card or a microSD multimedia card. It serves as the only storage for very tiny sensors that are linked to the internet of things.
Usage of eMMC: It is a storage for IoT sensors that are very small. Although the connection to the device's mainboard is parallel, the newest eMMC specification (version 5.1) provides for a transfer rate of up to 400 megabytes per second (MBps), which is similar to a SATA-connected solid-state drive.
eMMC applications: The mobile device industry, which employs the technology in cell phones, tablets, and notebooks, has been the dominant user of eMMC. Sensors placed into devices that gather data and return it to a business or organization have relied on smaller eMMC integrated circuits as the Internet of Things has grown in popularity.
Furthermore, as more vehicles feature onboard entertainment or navigation systems, eMMCs have become more popular in the automotive industry. Ruggedized eMMCs have been introduced by companies like FORESEE to withstand the environmental and stress demands of industrial and automotive applications. The eMMC IC is connected to the main circuit board of the device for which it saves data through a parallel connection. By utilizing an integrated controller in the eMMC, the device CPU is relieved of the responsibility of data storage, since the controller in the eMMC assumes that responsibility. This frees up the CPU, which is a slower, lower-power processor than those found in PCs and servers, for other vital duties. When compared to a spinning disk, the entire IC-based storage takes very little power.
What is the difference between an eMMC and a UFS storage?
1. The signaling interface on the UFS is Low Voltage Differential Signaling (LVDS).
2. A command queue (CQ) in UFS sorts out commands to be executed and allows multiple commands to be executed.
3. Because eMMC is half-duplex, it can read or write to the memory.
4. UFS is a full-duplex interface that allows read and writes operations to occur simultaneously.
5. UFS is faster than eMMC.
6. Advanced features like Deep Sleep, write booster, and throttling notifications to the host are all supported by UFS.
eMMC vs SSD: When employed in the correct applications, eMMC is a terrific storage media. Applications in which an SSD is not suitable due to its size or cost. Purchasing an eMMC BGA and attaching it to an embedded system's motherboard is simple because it relieves the main CPU of low-level flash storage management. Automotive eMMC device drivers are available for a variety of operating systems.
Automotive eMMC offers additional security protections to an already secure standard. The transfer speeds are fantastic. The device is only as good as the HW/FW inside the eMMC module, as it always is. So pick carefully. Consider factors such as logical to physical mapping methods, wear levelling, read/write disturb management (flash durability), read error correction, and the type of Flash employed.