What is inand? What are the advantages of inand?

Reference: http://blog.csdn.net/flymachine/article/details/7196456

SanDisk inand isSmall, easy-to-integrate high-speed NAND Flash SD interface chip(Equivalent to a NAND re-integration MMC Interface). Embedded flash memory is a popular storage solution for high-end consumer electronic products such as MP4 players, GPS communication devices, personal media players, and mobile phones. SanDisk inand is a complete sub-system that integrates serial controllers and high-speed
Nand flash memory. The inand controller saves the CPU and RAM buffer of the primary system, ensures high reliability and provides a complete disk-type file management structure. It is equipped with an industry-accepted SD serial interface, and SanDisk inand can run on the same bus as the SD card.

Inand is a storage chip developed by SanDisk. It can be simply regarded as an SD card or an mmccard chip. You can use the SD card or mmccard by default. Compared with MLC, inand has the following advantages:

1. Improve Performance

1. Reduce SOC workload and save SOC Resources

If MLC is used for storage, SOC should be involved in Bad block management and ECC correction management of flash, which will sacrifice some Soc performance. However, if inand is used, all flash management work can be completed through inand, SOC only reads and writes the inand when needed, and can ignore the inand at other times.

2. Fast read/write speed

(1) inand built-in cache module. If you want to store small files smaller than 4 K, the cache can help you increase the speed to about 10 times of MLC, in addition, the cache module does not require user control. As long as you store small files, the cache starts automatically, which is very convenient.

(2) inand can simulate the built-in MLC flash into SLC. It is the inand with the read/write speed and other performance of SLC, thus improving the read/write speed.

3. More Reliable and stable products

The built-in SanDisk patented technologies such as inand power-down protection and wear leveling can help customers improve the read/write life of flash, prevent system power-down and damage system files, and reduce the product repair rate.

Ii. Reduce system costs

First, because the Flash used in inandz is generally the latest and most advanced flash on the market, inand has a certain price advantage. Secondly, the inand packages are the same for different capacities. If a customer has several models with different capacities, the PCB only needs to be set, which can help the customer simplify work and improve efficiency, for example, Apple iPhone has 8g, 16g and other capacity products, his PCB only needs one set, and the correct inand can be pasted during production.

Iii. Convenient procurement

When purchasing inand, you only need to pay attention to the used capacity and do not need to manage the process and architecture. However, many CPUs are not fully compatible with General NAND Flash. If a CPU supports flash with a maximum of 51 nm, and the flash manufacturer upgrades the flash product, the customer may encounter procurement difficulties, there are also products from Samsung, Hyundai, micron, and other companies on the market. They all comply with the standards of the JEDEC Committee and are fully compatible with the products.

4. Easy to use, accelerating the R & D progress of your products

1. Software

For software engineers, the flash process changes, and the corresponding drivers also need to change.ProgramPort,CodeAll the upgrades must be re-debugged, while the inand product drivers are exactly the same. Once the debugging is successful, there will be no worries;

2. Hardware

The Hardware Engineer may also need to re-layout the new flash to increase the work intensity,Inand, regardless of the large capacity, the encapsulation is the same.If your company's product capacity is upgraded, you can simply replace the higher-capacity inand on the original PCB.