Datasheet

Introduction
Intel
®
Atom™ Processor E6xx Series Datasheet
29
1.3.9 Intel
®
High Definition Audio
β
(Intel
®
HD Audio
β
) Controller
The Intel
®
High Definition Audio
β
Specification defines a digital interface that can be
used to attach different types of codecs (such as audio and modem codecs). The Intel
®
HD Audio
β
controller supports up to four audio streams, two in and two out.
With the support of multi-channel audio stream, 32-bit sample depth, and sample rate
up to 192 kHz, the Intel
®
High Definition Audio
β
(Intel
®
HD Audio
β
) controller provides
audio quality that can deliver consumer electronic (CE) levels of audio experience. On
the input side, the Intel
®
Atom™ Processor E6xx Series adds support for an array of
microphones.
The Intel
®
HD Audio
β
controller uses a set of DMA engines to effectively manage the
link bandwidth and support simultaneous independent streams on the link. The Intel
®
HD Audio
β
controller also supports isochronous data transfers allowing glitch-free audio
to the system.
1.3.10 SMBus Host Controller
The Intel
®
Atom™ Processor E6xx Series contains an SMBus host interface that allows
the processor to communicate with SMBus slaves. This interface is compatible with
most I
2
C* devices.
The SMBus host controller provides a mechanism for the processor to initiate
communications with SMBus peripherals (slaves). See the System Management Bus
(SMBus) Specification, Version 1.0.
1.3.11 General Purpose I/O (GPIO)
The Intel
®
Atom™ Processor E6xx Series contains a total of 14 GPIO pins.
Five of these GPIOs are powered by core power rail and are turned off during sleep
mode (S3 and higher). Nine of these GPIOs are powered by the suspend power well
and remained active during S3. Five of the GPIOs in suspend power well can be used to
wake the system from the Suspend-to-RAM state, provided that current OS will not
clear the GPE0E register before entering S3 state. The five GPIOs that can be use are
GPIO_SUS[1], GPIO_SUS[2], GPIO_SUS[3], GPIO_SUS[4] and GPIO_SUS[7].
GPIO_SUS[4: 1] can be use to wake the system from Suspend-to-RAM state provided
LVDS is disabled on the platform as these signals are being used by LVDS display.
The GPIOs are not 5 V tolerant.
1.3.12 Serial Peripheral Interface (SPI)
The Intel
®
Atom™ Processor E6xx Series contains an SPI interface that supports boot
from SPI flash. This interface only supports BIOS boot.
1.3.13 Power Management
The Intel
®
Atom™ Processor E6xx Series contains a mechanism to allow flexible
configuration of various device maintenance routines as well as power management
functions including enhanced clock control and low-power state transitions (e.g.,
Suspend-to-RAM and Suspend-to-Disk). A hardware-based thermal management
circuit permits software-independent entrance to low-power states. The processor
contains full support for the Advanced Configuration and Power Interface (ACPI)
Specification, Revision 3.0.