1.1. General Description
iNAND is an Embedded Flash Drive (EFD) designed for mobile handsets and consumer electronic devices. iNAND is a hybrid device combining an embedded thin flash controller and standard MLC NAND flash memory, with an industry standard e.MMC 4.411 interface.
Empowered with a new e.MMC4.41 feature set such as Boot and RPMB partitions, HPI (implemented on MLC products only), and HW Reset the iNAND e.MMC is the optimal device for reliable code and data storage.
Designed specifically for mobile multimedia applications, iNAND is the most mature on board SD/MMC device since 2005, providing mass storage of up to 64GB in JEDEC compatible form factors, with low power consumption and high performance – an ideal solution for multimedia handsets of 2.5G, 3G, 3.5G and 4G.
In addition to the high reliability and high system performance offered by the current iNAND family of products, iNAND offers plug-and-play integration and support for multiple NAND technology transitions, as well as features such as advanced power management scheme.
iNAND uses advanced Multi-Level Cell (MLC) NAND flash technology, enhanced by SanDisk‟s embedded flash management software running as firmware on the flash controller.
iNAND architecture and embedded firmware fully emulates a hard disk to the host processor, enabling read/write operations that are identical to a standard, sector-based hard drive. In addition, SanDisk firmware employs patented methods, such as virtual mapping, dynamic and static wear-leveling, and automatic block management to ensure high data reliability and maximize flash life expectancy.
SanDisk iNAND provides up to 64GB of memory for use in mass storage applications. In addition to the mass-storage-specific flash memory chip, iNAND includes an intelligent controller, which manages interface protocols, data storage and retrieval, error correction code (ECC) algorithms, defect handling and diagnostics, power management and clock control.
iNAND enables multimedia driven applications such as music, photo, video, TV, GPS, games, email, office and other applications.
The breakthrough in performance and design makes iNAND the ideal solution for mobile handset vendors, portable navigation and Automotive Infotainment vendors who require easy integration, fast time to market and high-capacity.
1.2. Plug-and-Play Integration
iNAND optimized architecture eliminates the need for complicated software integration and testing processes and enables a practically plug-and-play integration in the system. The replacement of one iNAND device with another of a newer generation requires virtually no changes to the host. This makes iNAND the perfect solution for platforms and reference designs, as it allows for the utilization of more advanced NAND Flash technology with minimal integration or qualification efforts.
SanDisk iNAND is well-suited to meet the needs of small, low power, electronic devices. With JEDEC form factors measuring 12mm x 16mm (169 balls), and 11.5x13mm (153 balls) compatible with 0.5mm ball pitch, iNAND is fit for a wide variety of portable devices such as multi-media mobile handsets, personal media players, GPS devices and Automotive infotainment (car multimedia and car navigation).
To support this wide range of applications, iNAND is offered with an MMC/SD Interface.
The MMC interface allows for easy integration into any design, regardless of the host (chipset) type used. All device and interface configuration data (such as maximum frequency and device identification) are stored on the device.
Figure 1 shows a block diagram of the SanDisk iNAND with MMC Interface.
1.3. Feature Overview
SanDisk iNAND, with MMC interface, features include the following:
Memory controller and NAND flash
Complies with e.MMC Specification Ver. 4.412
Mechanical design complies with JEDED MO-276C Specification
Offered in five TFBGA packages of e.MMC 4.413
o 11.5mm x 13mm x 1.0mm (2GB, 4GB,8GB)
o 11.5mm x 13mm x 1.2mm (16GB)
o 12mm x 16mm x 1.0mm (8GB,16GB)
o 12mm x 16mm x 1.2mm (32GB)
o 12mm x 16mm x 1.4mm (64GB)
- · Operating temperature range: –25C° to +85C°
Dual power system
Core voltage (VCC) 2.7-3.6v
I/O (VCCQ) voltage, either: 1.7-1.95v or 2.7-3.6v
Up to 64GB of data storage.
Supports three data bus widths: 1bit (default), 4bit, 8bit.
Variable clock frequencies of 0-20 MHz, 0-26 MHz (default), 0-52 MHz (high-speed)
Up to 104 MB/sec bus transfer rate, using 8 parallel data lines at 52 MHz, DDR Mode
Correction of memory field errors
Designed for portable and stationary applications that require high performance and reliable data storage
Capacity |
SDIN5D1-2G-L |
SDIN5D2-4G-L |
SDIN5D2-8G-L |
SDIN5C2-8G-L |
SDIN5D2-16G-L |
SDIN5C2-16G-L |
SDIN5C2-32G-L |
SDIN5C2-64G-L |
SDIN5D1-4G-L |
SDIN5D1-8G-L |
SDIN5C1-8G-L |
SDIN5C1-16G-L |
SDIN5D1-16G-L |
SDIN5C1-32G-L |
SDIN5C1-64G-L
iNAND是SanDisk公司研发的存储芯片,可以简单的看成SD卡或MMC卡芯片化。用户完全可以默认他是SD卡或者MMC卡。 相对MLC,iNAND有以下优点:
1、提高性能
1)减少SOC的工作量,节约SOC资源。如果使用MLC做存储,SOC要参与FLASH的坏块管理、ECC校正等管理,会牺牲部分SOC性能,而使用iNAND的话,FLASH的管理工作都有iNAND完成,SOC只在需要时对iNAND进行读写,其他时候完全可以不需要理会iNAND。
2)读写速度快
(1)iNAND内置Cache模块,如果要存储小于4K的小容量文件时,Cache能够帮助用户将速度提高至MLC的10倍左右,并且Cache模块不需要用户控制,只要存储小容量文件,Cache自动启动,非常方便。
(2)iNAND可以将内置的MLC FLASH模拟成为为SLC,是iNAND具有SLC的读写速度及其他性能,从而提高读写速度。
3)产品更可靠稳定iNAND内置掉电保护、Wear leveling等SANDISK专利技术,可以帮助客户提高FLASH的读写寿 命,以及防止系统忽然掉电损坏系统文件,降低产品返修率。
2、降低系统成本
首先因为iNANDZ中选用的FLASH一般都是市场上最新、最先进制程的FLASH,所以iNAND具有一定的价格优势。
其次,iNAND不同容量的封装一致,客户如果某款机型有不同容量的几个型号,那么它PCB只需要做一套即可,可以帮助客户简化工作、提高效率,比如苹果iPHONE有8G、16G等容量产品,他的PCB只需要一套,生产时候贴上对用的iNAND即可。
3、方便采购
采购iNAND时候只需要注意使用的容量,不需要管制程、架构。而很多CPU对普通NAND FLASH不是完全兼容,假如某款CPU最多支持51nm制程的FLASH,如果FLASH厂家产品升级,该客户就可能遇到采购困难等问题,而且市场上也有三星、现代、美 光等公司的产品,他们都是完全遵照JEDEC委员会的标准,产品完全兼容。
4、使用简单,加快贵司产品研发进度
1)对软件工程师而言,FLASH制程改变,其对应驱动也需要随之变化,其程序移植、代码升级都要重新调试,而iNAND的产品驱动完全一样,一次调试成功就无后顾之忧;
2)对应硬件工程师也可能会因为新FLASH要重新布板,增加工作强度,而iNAND不管多大容量,封装都一样,如果贵司产品容量升级,可以直接在原先的PCB上换上更高容量的iNAND即可。
从上面可以看出,Inand 和emmc 的关系式什么了
就是inand 式sandisk 公司做的一款符合emmc 标准的一个emmc 存储器!
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