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TSB42AA9A Datenblatt(PDF) 1 Page - Texas Instruments |
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TSB42AA9A Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 7 page www.ti.com FEATURES DESCRIPTION TSB42AA9A SLLA219 – JUNE 2006 StorageLynx 1394 Link-Layer Controller for ATA/ATAPI Storage Products • Automatic response to configuration ROM quadlet and block read requests • Serial bus data rates of 100, 200, and 400 Mbps • External flash PROM / EPROM interface for easy program code changes during • IEEE P1394a compliant and IEEE Std prototyping 1394-1995 • Separate address and data busses for the • Automated SBP-2 transport protocol engine external flash PROM / EPROM interface (no • ATA/ATAPI command translation by external latches) embedded processor and firmware • 16K internal ROM program memory • Programmable ATA/ATAPI interface • 576 Byte (128 quadlet) transmit control FIFO, supporting PIO modes 0–4, DMA modes 0–2, 576 byte (128 quadlet) receive control FIFO and Ultra DMA modes 0–4 • Bidirectional data FIFO • Automated 1394 and SBP-2 header removal and insertion • 0.18 micron CMOS technology with embedded RAM and ROM • Internal parameter RAM for fast access to configuration ROM and key SBP-2 • Space-saving 100 pin TQFP package parameters The Texas Instruments TSB42AA9A (StorageLynx) is a 1394 link layer controller designed to function as a native bridge between the 1394 bus and ATA (AT attachment) or ATAPI (AT attachment with packet interface) data storage applications. These data storage devices can include external hard disk drives (HDDs), ZIP drives, magneto-optical (MO) drives, ORB drives, CD-ROMs, CD-R/Ws, DVD-ROMs, and DVD-RAMs. The ATA/ATAPI interface of the TSB42AA9A supports signaling and timing for programmed input/output (PIO) modes 0–4, direct memory access (DMA) modes 0–2, and Ultra DMA modes 0–4. The 1394 interface of StorageLynx is IEEE P1394a(1) and IEEE Std 1394-1995(2) compliant and supports 400, 200, and 100 Mbps serial bus data rates. StorageLynx is particularly designed for any data storage application that supports the SBP–2(3) (Serial Bus Protocol 2) transaction layer as a target device. The TSB42AA9A automates the SBP-2 target controller functions by implementing the management and command agents in hardware. Data handling is also executed in hardware, with no assistance from the processor needed to setup a DMA transaction to fetch data from the ATA/ATAPI device and return it to the SBP-2 initiator via the 1394 bus. StorageLynx translates SBP-2 protocol commands to ATA/ATAPI commands using the hardware-implemented functions and an embedded 8052 processor executing firmware. The firmware is located in the internal ROM of the device or optionally, an external memory location. A 2-wire serial bus interface is included on the TSB42AA9A. This interface enables configuration ROM information required by IEEE Std 1394-1995(2) and SBP-2 to be loaded from a serial EEPROM into the device’s internal parameter RAM. The internal parameter RAM allows StorageLynx faster access to important configuration information as well as automatic responses to configuration ROM read requests from the system host. In addition, StorageLynx provides a memory interface that can be used to access firmware from an external Flash PROM/EPROM for testing and development purposes, or to support storage applications that require specialized functionality. The StorageLynx memory interface also supports write operations to the Flash PROM/EPROM, removing the need for parts to be in sockets and allowing for easy software downloads. Flash memory is not required unless custom functionality and in-system reprogrammability are requirements. (1) IEEE P1394a, Draft Standard for a High Performance Serial Bus (Supplement) (2) IEEE Std 1394–1995, Standard for a High Performance Serial Bus (3) T10 Project 1155D, ANSI NCTIS.xxx-199x, Serial Bus Protocol 2 (SBP-2) Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2006, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Ähnliche Teilenummer - TSB42AA9A_14 |
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Ähnliche Beschreibung - TSB42AA9A_14 |
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