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SST55LD019A
ATA Flash Disk Controller
SST ATA Flash Disk Controller 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 to the standard NAND-type flash media. The SST55LD019A/B/C device supports Single Level Cell (SLC) flash media. This technology suits solid state mass storage applications offering new, expanded functionality while enabling smaller, lighter designs with lower power consumption.
The ATA/IDE interface is widely used in such products as portable and desktop computers, digital cameras, music players, handheld data collection scanners, PDAs, handy terminals, personal communicators, audio recorders, monitoring devices, and set-top boxes. SST ATA Flash Disk Controller supports standard ATA/IDE protocol with up to PIO Mode-4 and Multi-word DMA Mode-2 interface.
Utilizing SST’s proprietary SuperFlash memory technology, the ATA Flash Disk Controller is factory pre-programmed with an embedded flash file system which, upon initial Power-on, recognizes the 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 sec + 0.5 sec/GByte of drive capacity, allowing a 2 GByte flash drive to be fully initialized in about 4 seconds.
This technology enables a very fast, completely seamless integration of flash drives into an embedded design. For added manufacturing flexibility, system debug, re-initialization, and user customization can be accomplished either through the ATA/IDE interface, for ATA Disk Module or flash drive products, or through the Serial Communication Interface (SCI), for fully embedded ATA Flash Disk Controller designs.
The SST55LD019A/B/C high-performance ATA Flash Disk Controller offers sustained read and write performance up to 10.0 MB/sec. The SST55LD019A controller is to be used when the random access performance needs to be maximized. The SST55LD019B controller is to be used when the sequential access performance needs to be maximized. The SST55LD019C controller is to be used when the flash drive capacity and sequential access performance need to be maximized. The SST55LD019A/B/C can directly support up to 8 flash media devices or, through simple decoding logic, can support up to 64 flash media devices. Users can select either an internal or external system clock option for optimal performance vs. the supply current.
The SST55LD019A/B/C 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-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, an 84-ball TFBGA package, or a 85-ball VFBGA package for easy integration into an SMT manufacturing process.Application Notes
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