OMAPL138B-EP_15 Datasheet, PDF (146/284 Pages) Texas Instruments – OMAPL138B C6-Integra DSP+ARM Processor

OMAPL138B-EP
SPRS815C – DECEMBER 2011 – REVISED APRIL 2013
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5.14 Serial ATA Controller (SATA)
The Serial ATA Controller (SATA) provides a single HBA port operating in AHCI mode and is used to
interface to data storage devices at both 1.5 Gbits/second and 3.0 Gbits/second line speeds. AHCI
describes a system memory structure that contains a generic area for control and status, and a table of
entries describing a command list where each command list entry contains information necessary to
program an SATA device, and a pointer to a descriptor table for transferring data between system memory
and the device.
The SATA Controller supports the following features:
• Serial ATA 1.5 Gbps (Gen 1i) and 3 Gbps (Gen 2i) line speeds
• Support for the AHCI controller spec 1.1
• Integrated SERDES PHY
• Integrated Rx and Tx data buffers
• Supports all SATA power management features
• Internal DMA engine per port
• Hardware-assisted native command queuing (NCQ) for up to 32 entries
• 32-bit addressing
• Supports port multiplier with command-based switching
• Activity LED support
• Mechanical presence switch
• Cold presence detect
The SATA Controller support is dependent on the CPU voltage operating point:
• At CVDD = 1.3V, SATA Gen 2i (3.0 Gbps) and SATA Gen 1i (1.5 Gbps) are supported.
• At CVDD = 1.2V, SATA Gen 2i (3.0 Gbps) and SATA Gen 1i (1.5 Gbps) are supported.
• At CVDD = 1.1V, SATA Gen 1i (1.5 Gbps) only is supported.
• At CVDD = 1.0V, SATA is not supported.
146 Peripheral Information and Electrical Specifications
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