Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
Serial ATA (SATA)
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
1921
17.2.2
Theory of Operation
17.2.2.1
Standard ATA Emulation
The SoC contains a set of registers that shadow the contents of the legacy IDE
registers. The behavior of the Command and Control Block registers, PIO, and DMA
data transfers, resets, and interrupts are all emulated.
registers. The behavior of the Command and Control Block registers, PIO, and DMA
data transfers, resets, and interrupts are all emulated.
Note:
The SoC will assert INTR when the master device completes the EDD command
regardless of the command completion status of the slave device. If the master
completes EDD first, an INTR is generated and BSY will remain '1' until the slave
completes the command. If the slave completes EDD first, BSY will be '0' when the
master completes the EDD command and asserts INTR. Software must wait for busy to
clear (0) before completing an EDD command, as required by the ATA5 through ATA7
(T13) industry standards.
regardless of the command completion status of the slave device. If the master
completes EDD first, an INTR is generated and BSY will remain '1' until the slave
completes the command. If the slave completes EDD first, BSY will be '0' when the
master completes the EDD command and asserts INTR. Software must wait for busy to
clear (0) before completing an EDD command, as required by the ATA5 through ATA7
(T13) industry standards.
17.2.2.2
48-Bit LBA Operation
The SATA host controller supports 48-bit LBA through the host-to-device register FIS
when accesses are performed using writes to the task file. The SATA host controller will
ensure that the correct data is put into the correct byte of the host-to-device FIS.
when accesses are performed using writes to the task file. The SATA host controller will
ensure that the correct data is put into the correct byte of the host-to-device FIS.
Host & Link Initiated Power
Management
Management
Capability for the host controller or device to request Partial
and Slumber interface power states
and Slumber interface power states
Staggered Spin-Up
Enables the host to spin up hard drives sequentially to prevent
power load problems on boot
power load problems on boot
Command Completion
Coalescing
Coalescing
Reduces interrupt and completion overhead by allowing a
specified number of commands to complete and then
generating an interrupt to process the commands
specified number of commands to complete and then
generating an interrupt to process the commands
Table 190. SATA/AHCI Feature Matrix
Feature
AHCI Disabled
AHCI Enabled
Native Command Queuing (NCQ)
N/A
Supported
Auto Activate for DMA
N/A
Supported
Hot Plug Support
N/A
Supported
Asynchronous Signal Recovery
N/A
Supported
3 Gb/s Transfer Rate
Supported
Supported
ATAPI Asynchronous Notification
N/A
Supported
Host & Link Initiated Power Management
N/A
Supported
Staggered Spin-Up
Supported
Supported
Command Completion Coalescing
N/A
N/A
Table 189. SATA Feature List (Sheet 2 of 2)
Feature
Description