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SST55VD020
ATA Flash Disk Controller
For more detailed product information and data sheet, please contact your local sales representatives or sales manager.
The SST55VD020 is the heart of a high-performance, flash media-based data storage system. The ATA Flash Disk Controller recognizes the control, address, and data signals on the ATA/IDE bus and translates them into memory accesses for standard NAND-type flash media. Utilizing both Single-Level Cell (SLC) and Multi-Level Cell (MLC) flash media, this technology supports solid state mass storage applications by offering new, expanded functionality while enabling smaller, lighter designs with lower power consumption.
The ATA Flash Disk Controller supports standard ATA/IDE protocol with up to PIO Mode-6, Multi-word DMA Mode- 4, and Ultra DMA Mode-4 interface. The ATA/IDE interface is widely used in such products as portable and desktop computers, portable media player, music players, handheld data collection scanners, PDAs, handy terminals, personal communicators, audio recorders, monitoring devices, and set-top boxes.
The ATA Flash Disk Controller uses SuperFlash® memory technology and is factory pre-programmed with an embedded flash file system. Upon initial power-on, the SST55VD020 recognizes attached flash media devices, sets up a bad block table, executes all necessary handshaking routines for flash media support, and, finally, performs the low-level format. This process typically takes about 3 second plus 0.5 seconds per gigabyte of drive capacity, allowing a 4 GByte flash drive to be fully initialized in about 5 seconds. For added manufacturing flexibility, system debug, re-initialization, and user customization can be accomplished through the ATA/IDE interface.
The SST55VD020 high-performance ATA Flash Disk Controller offers sustained read and write performance up to 30 MByte/sec. The SST55VD020 directly supports up to eight flash media devices or, through simple decoding logic, can support up to 64 flash media devices.
The SST55VD020 offers added security protection for confidential information stored in the flash media. It allows up to four protection zones which can be set by the user to be Read/Write, Read-only, or Hidden (Read-disabled). The ATA Flash Disk Controller can access the data within the protected zones through a password-protected command. The controller also provides a WP#/PD# pin to protect critical information stored in the flash media from unauthorized overwrites.
The ATA Flash Disk Controller comes pre-programmed with a 10-byte unique serial ID. For even greater system security, the user has the option of programming an additional 10 Bytes of ID space to create a unique, 20-byte ID.
The ATA Flash Disk Controller comes packaged in an industry-standard, 100-lead TQFP package or a 85-ball VFBGA package for easy integration into an SMT manufacturing process.Application Notes
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