Real Time Clock RTC/Battery | Ampro Corporation XTX 820 instruction

Chapter 3

Hardware

Real Time Clock (RTC)/Battery

The XTX 820 supports a Real Time Clock (RTC) and CMOS RAM for the BIOS Setup Utility. The RTC and 256 byte of CMOS RAM are included inside the I/O Hub (Southbridge) chip (82801FBM). The RTC and CMOS are powered through pin-8 (BAT) on J4 with a Lithium Battery located on the baseboard. If the battery is not present, the BIOS has a battery-free boot option to complete the boot process. .

Table 3-26. Simplified Power Control and Miscellaneous Pin/Signal Descriptions (J4)

J4	Signal	Description
Pin #
3	5V_SB	5 volt Suspend – This control signal is sent to the ATX power supply for a
		suspend or standby state.
4	PWGIN	Power Good In – This active high input signal indicates to the XTX 820, the
		power is good and it can begin the boot process.
5	PS_ON	Power Supply On – This active-low output signal from the XTX 820 is sent
		to the ATX power supply to turn it on.
7	PWRBTN*	Power Button – This signal provides a ground temporarily through an open
		collector driver to the ATX power supply to change states (turn it on).
6	SPEAKER	Speaker – This PC speaker output signal must be connected to a speaker
		(piezoelectric or dynamic) on the baseboard to hear the output (beeps).
11	RSMRST*	Resume Reset – This signal is driven low by external circuitry to reset the
		power management logic on the XTX 820.
19	OVCR	Over Current Detect – This signal indicates a USB over-current condition.

8	BAT	Battery Voltage – This is the + battery connection to baseboard for +3 volt
		lithium backup battery used for RTC operation and CMOS non-volatile
		memory.
41	BATLOW*	Battery Low – This external signal to the XTX 820 indicates when the
		external battery is low.
21	EXTSMI*	Extern System Management Interrupt – This signal is provided by external
		circuitry to initiate an SMI event with the XTX 820.
23	SMBCLK	System Management Bus Clock – This signal is used to support internal and
		external SMBus devices, such as temperature and battery monitoring.
24	SMBDATA	System Management Bus Data – This signal is used to support internal and
		external SMBus devices, such as temperature and battery monitoring.
26	SMBALRT*	System Management Bus Alert – This signal is used by SMBus devices to
		signal an event on the SM Bus.

Note: The shaded area denotes power or ground.

SMBus (I2C Bus)

The I/O Hub (82801FBM) contains an integrated SMBus controller with both a host and slave SMBus port; but the host cannot access the slave internally. The slave port allows an external master access to the I/O Hub (Southbridge) through the J4 connector. The master contained in the I/O Hub is used to communicate with the Memory & Graphics Hub, DDR2 RAM EPROM, and the clock generator.

•The I2C slave address must not be the same as the I2C device on the baseboard.

Reference Manual

XTX 820

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.