Functional Description
5.21
Intel® High Definition Audio Overview
The ICH10’s High Definition Audio (HDA) controller communicates with the external
codec(s) over the Intel High Definition Audio serial link. The controller consists of a set
of DMA engines that are used to move samples of digitally encoded data between
system memory and an external codec(s). The ICH10 implements four output DMA
engines and 4 input DMA engines. The output DMA engines move digital data from
system memory to a D-A converter in a codec. ICH10 implements a single Serial Data
Output signal (HDA_SDOUT) that is connected to all external codecs. The input DMA
engines move digital data from the A-D converter in the codec to system memory. The
ICH10 implements four Serial Digital Input signals (HDA_SDI[3:0]) supporting up to
four codecs.
Audio software renders outbound and processes inbound data to/from buffers in
system memory. The location of individual buffers is described by a Buffer Descriptor
List (BDL) that is fetched and processed by the controller. The data in the buffers is
arranged in a predefined format. The output DMA engines fetch the digital data from
memory and reformat it based on the programmed sample rate, bit/sample and
number of channels. The data from the output DMA engines is then combined and
serially sent to the external codecs over the Intel High Definition Audio link. The input
DMA engines receive data from the codecs over the Intel High Definition Audio link and
format the data based on the programmable attributes for that stream. The data is
then written to memory in the predefined format for software to process. Each DMA
engine moves one stream of data. A single codec can accept or generate multiple
streams of data, one for each A-D or D-A converter in the codec. Multiple codecs can
accept the same output stream processed by a single DMA engine.
Codec commands and responses are also transported to and from the codecs using
DMA engines.
5.22
Intel® Active Management Technology (Intel®
AMT) (Corporate Only)
Intel Active Management Technology is a set of advanced manageability features
developed as a direct result of IT customer feedback gained through Intel market
research. Reducing the Total Cost of Ownership (TCO) through improved asset tracking,
remote manageability, and fewer desk-side visits were identified as key IT priorities.
Intel AMT extends the capabilities of existing management solutions by making the
asset information, remote diagnostics, recovery and contain capabilities always
available, or Out of Band (OOB), even when the system is in a low-power “off” state or
the OS is hung.
Another feature of Intel AMT is System Defense. System Defense is used to stop the
propagation of worms and viruses. Programmable packet filters in the integrated LAN
Controller are used to accomplish this. These filters inspect all incoming and all
outgoing packets and decide whether to block or pass the packets as configured. There
is no indication to the host that a packet has been blocked or accepted.
The logic can be used to accept or block reception to host or transmission to network
paths. Additionally, counter logic can be used to count the number or filter matches for
a given filter. This feature allows for statistical sampling of connections as well as rate
limiting of connections.
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Datasheet
INTEL [ INTEL ]
