TSB42AA9A_14 Datasheet, PDF (1/7 Pages) Texas Instruments – StorageLynx 1394 Link-Layer Controller for ATA/ATAPI Storage Products

TSB42AA9A
www.ti.com
SLLA219 – JUNE 2006
StorageLynx 1394 Link-Layer Controller for ATA/ATAPI Storage Products
FEATURES
• Serial bus data rates of 100, 200, and 400
Mbps
• IEEE P1394a compliant and IEEE Std
1394-1995
• Automated SBP-2 transport protocol engine
• ATA/ATAPI command translation by
embedded processor and firmware
• Programmable ATA/ATAPI interface
supporting PIO modes 0–4, DMA modes 0–2,
and Ultra DMA modes 0–4
• Automated 1394 and SBP-2 header removal
and insertion
• Internal parameter RAM for fast access to
configuration ROM and key SBP-2
parameters
• Automatic response to configuration ROM
quadlet and block read requests
• External flash PROM / EPROM interface for
easy program code changes during
prototyping
• Separate address and data busses for the
external flash PROM / EPROM interface (no
external latches)
• 16K internal ROM program memory
• 576 Byte (128 quadlet) transmit control FIFO,
576 byte (128 quadlet) receive control FIFO
• Bidirectional data FIFO
• 0.18 micron CMOS technology with
embedded RAM and ROM
• Space-saving 100 pin TQFP package
DESCRIPTION
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated