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AM3892 Datasheet(PDF) 269 Page - Texas Instruments |
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AM3892 Datasheet(HTML) 269 Page - Texas Instruments |
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269 / 299 page  SATA Interface (Processor) SATA Connector SATA_TXN SATA_TXP SATA_RXN SATA_RXP TX- TX+ RX- RX+ 10 nF 10 nF 10 nF 10 nF AM3894 AM3892 www.ti.com SPRS681A – OCTOBER 2010 – REVISED MARCH 2011 8.17 Serial ATA Controller (SATA) The Serial ATA (SATA) peripheral provides a direct interface for up to two hard disk drives (SATA) and supports the following features: • Serial ATA 1.5 Gbps and 3 Gbps speeds • Integrated PHY • Integrated Rx and Tx data buffers • Supports all SATA power management features • Hardware-assisted native command queuing (NCQ) for up to 32 entries • Supports port multiplier with command-based switching for connection to multiple hard disk drives • Activity LED support. For more detailed information on the SATA, see the SATA chapter in the AM38x Sitara ARM Microprocessors (MPUs) Technical Reference Manual (literature number SPRUGX7). 8.17.1 SATA Interface Design Guidelines This section provides PCB design and layout guidelines for the SATA interface. The design rules constrain PCB trace length, PCB trace skew, signal integrity, cross-talk, and signal timing. Simulation and system design work has been done to ensure the SATA interface requirements are met. A standard 100-MHz differential clock source must be used for SATA operation (for details, see Section 7.3.2). 8.17.1.1 SATA Interface Schematic Figure 8-83 shows the data portion of the SATA interface schematic. The specific pin numbers can be obtained from Table 3-17, Serial ATA Terminal Functions. Figure 8-83. SATA Interface High-Level Schematic 8.17.1.2 Compatible SATA Components and Modes Table 8-93 shows the compatible SATA components and supported modes. Note that the only supported configuration is an internal cable from the processor host to the SATA device. Table 8-93. SATA Supported Modes PARAMETER MIN MAX UNIT SUPPORTED Transfer Rates 1.5 3.0 Gbps eSATA - - - No xSATA - - - No Backplane - - - No Internal Cable - - - Yes Copyright © 2010–2011, Texas Instruments Incorporated Peripheral Information and Timings 269 Submit Documentation Feedback Product Folder Link(s): AM3894 AM3892 |
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