Chapter 3

Hardware

AC'97/HDA CODEC

The additional signals provided by J2 support AC'97 digital audio CODECs as well HDA (High Definition Audio) audio CODECs.

Table 3-12. Audio CODEC Interface Pin/Signal Descriptions (J2)

Pin #

Signal

Description

81

AC_RST*

AC'97/HDA CODEC Reset

 

 

 

85

AC_SYNC

AC'97/HDA Serial Bus Synchronization

89

AC_BIT_CLK

AC'97/HDA 12.228 MHz Serial Bit Clock from CODEC

 

 

 

82

AC_SDOUT

AC'97/HDA Audio Serial Data Output to CODEC

 

 

 

86

AC_SDIN0

AC'97/HDA Audio Serial Data Input from CODEC0

87

AC_SDIN1

AC'97/HDA Audio Serial Data Input from CODEC1

88

AC_SDIN2

AC'97/HDA Audio Serial Data Input from CODEC2

 

 

 

79

CODECSET

AC`97/HDA Disable onboard Audio CODEC

 

 

 

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

LPC Interface

The LPC (Low Pin Count) bus is provided as a replacement for the increasingly less often used ISA bus. The LPC bus is used on PC-style personal computers to connect low-bandwidth devices to the CPU, such as the boot ROM, "legacy" I/O devices (supported by a Super I/O chip), and audio controllers. The "legacy" I/O devices usually include serial and parallel ports, keyboard, mouse, and a floppy disk controller. Due to the software compatibility of the LPC bus to the ISA bus, I/O devices such as additional serial ports can be easily implemented on an application specific baseboard using the LPC bus. There are also many devices available for the LPC bus.

Table 3-13. LPC Interface Pin/Signal Descriptions (J2)

Pin #

Signal

Description

91

LPC_AD0

LPC Multiplexed Command, Address and Data Line 0

93

LPC_AD1

LPC Multiplexed Command, Address and Data Line 1

 

 

 

94

LPC_FRAME*

LPC Frame – Indicates start of a new or termination of a broken cycle.

 

 

 

95

LPC_AD2

LPC Multiplexed Command, Address and Data Line 2

96

LPC_DRQ0*

LPC Encoded DMA/Bus Master Request Line 0

 

 

 

97

LPC_AD3

LPC Multiplexed Command, Address and Data Line 3

 

 

 

98

LPC_DRQ1*

LPC Encoded DMA/Bus Master Request Line 1

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

Extended System Management

The Extended System Management interface, implemented by the Super I/O chip (W83627HG), provide additional signals and functions to further improve system management. One of these signals is an output signal called FAN_PMOUT that allows system fan control using a PWM (Pulse Width Modulation) Output. Additionally there is an input signal called FAN_TACHOIN that provides the ability to monitor the system fan's RPMs (revolutions per minute).

XTX 820

Reference Manual

31

Page 37
Image 37
Ampro Corporation XTX 820 manual LPC Interface, Extended System Management

XTX 820 specifications

Ampro Corporation has made a significant mark in the world of embedded systems with its versatile XTX 820 embedded computing module. The XTX 820 is designed to cater to a wide array of applications, ranging from industrial automation to medical devices, providing developers with a powerful yet compact solution.

One of the standout features of the XTX 820 is its advanced processing capabilities. The module is equipped with an Intel Atom processor, which delivers impressive performance while operating at low power levels. This combination makes the XTX 820 suitable for environments where energy efficiency is essential. The Atom processor allows for seamless multitasking and support for demanding applications without compromising on thermal efficiency.

In terms of memory, the XTX 820 supports a range of configurations, accommodating both DDR2 and DDR3 memory types. With a maximum of up to 4GB of onboard memory, this module ensures that applications can run smoothly and efficiently across various tasks. The flexibility in memory options enables developers to tailor their designs according to specific project needs.

Connectivity is another strong suit of the XTX 820. The module comes with multiple I/O interfaces that enhance its utility in various applications. It features USB, Serial, and Parallel ports, along with support for LVDS display and audio interfaces. This diverse range of connectivity options allows the XTX 820 to integrate easily with a variety of systems and devices, facilitating seamless data transfer and communication.

Security is increasingly critical in embedded systems, and Ampro has integrated robust security features into the XTX 820. This includes support for hardware-based security solutions, which can protect sensitive data and prevent unauthorized access. Such characteristics make the module a suitable choice for industries where data integrity is paramount.

Furthermore, the XTX 820 boasts an impressive range of environmental operating conditions. It is designed to function in extreme temperatures, making it suitable for outdoor and industrial applications where fluctuations in temperature can be a concern.

In conclusion, the Ampro Corporation XTX 820 embedded computing module emerges as a versatile platform that combines performance, memory flexibility, robust connectivity, and enhanced security features. Its design is tailored to meet the demands of various industries, making it a reliable choice for developers looking for advanced embedded solutions.