Interfaces change all the time towards faster, lower power, fewer pins, and newer standards, making it a difficult task for processors to follow and integrate them. A prime function of West Bridge devices is to enable connection to these varied interfaces.
An example of such an interface is NAND Flash, which keeps evolving with new generations of Multi-Level Cell NAND. A West Bridge device might handle the MLC NAND management and enable lowest-cost memory support for a main processor, which otherwise would only support NOR or Single-Level Cell NAND.
Some commonly supported interfaces of West Bridge companion chips are:
- Mass storage
- SD v1.1
- SD v2.0
- MLC NAND
- SLC NAND
- Full NAND Management
- USB 2.0 at 480 Mbit/s
Read more about this topic: West Bridge
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