Chipset Setup, Continued

DRAM ECC Mode This option sets the type of system memory checking. The settings are:

Setting

Description

Disabled

No error checking or error reporting is done.

Level I

Multibit errors are detected and reported as parity errors. Single-bit errors are

 

correctedbythechipset.Correctedbitsofdatafrommemoryarenotwrittenback

 

toDRAMsystemmemory.IfLevel I isselected,theJ27ExternalSMIsoftware

 

jumper on the Series 735 board is disabled.

Level II

Multibit errors are detected and reported as parity errors. Single-bit errors are

 

correctedbythechipsetandarewrittenbacktoDRAMsystemmemory.

 

Ifasoft(correctable)memoryerroroccurs,writingthefixeddatabacktoDRAM

 

systemmemorywillresolvetheproblem.MostDRAMerrorsaresofterrors.Ifa

 

hard (uncorrectable) error occurs,writing thefixed data back to DRAM system

 

memorydoesnotsolvetheproblem.Inthiscase,thesecondtimetheerroroccurs

 

in the same location, a Parity Error is reported, indicating an uncorrectable error.

 

If Level II is selected, AMIBIOS automatically sets the Standard Power

 

Management optioninPowerManagementSetuptoEnabled tomakesure

 

thattheSystemManagementInterface(SMI) is enabled. If you do not want to

 

enablepowermanagement,settheAdvanced Power Management (APM) option

 

to Disabled and set all Power Management Setup timeout options to

 

Disabled. Toenable power management, setAdvanced Power Management

 

(APM) to Enabled andsetthepowermanagementtimeoutoptionsasdesired.

The following illustrates the difference between Level I and Level II ECC. Suppose a DRAM SIMM has a single bit uncorrectable error. Even writing fixed data to this bit will not remove the error.

Setting

then...

Level I

the data error is fixed during the memory read cycle every time

 

the bad bit is accessed and the system continues to run, although

 

every time the bad bit is read and corrected, CPU cycles are

 

wasted.

Level II

the system tries to write the corrected data back to the bad bit in

 

the DRAM SIMM. Since the bad bit in the SIMM cannot be fixed,

 

writing data to the bad bit has no effect. The next time the error

 

location is read, the chipset will once again find a bad bit. The

 

chipset generates a Parity Error, indicating an uncorrectable

 

memory error.

The Optimal and Fail-Safe defaults are Disabled.

Cont’d

Chapter 2 WINBIOS Setup

57

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American Megatrends MAN-758 manual Optimal and Fail-Safe defaults are Disabled Cont’d

MAN-758 specifications

American Megatrends has established itself as a prominent player in the realm of BIOS and firmware solutions, and one of its notable products is the MAN-758 system on a module (SoM). The MAN-758 is particularly attractive for embedded applications, industrial automation, and IoT devices. This product is designed to meet the demands of modern computing while maintaining an efficient footprint.

At the heart of the MAN-758 is an advanced ARM Cortex processor, which provides significant performance advantages over lesser platforms while maintaining low power consumption. Users can expect highly responsive performance, making it suitable for increasingly complex applications. The module is also equipped with multiple memory options, including DDR4 RAM, which further enhances its capabilities for multitasking and data handling.

The MAN-758 is designed for versatility, boasting various I/O interfaces that cater to different application needs. It includes multiple USB ports, serial ports, and support for gigabit Ethernet, allowing for seamless connectivity. This flexibility makes it ideal for industries that require robust communication capabilities.

In terms of technologies, the MAN-758 showcases advanced thermal management, ensuring optimal performance even in demanding environments. The module supports a wide operating temperature range, making it particularly useful for industrial applications where extreme conditions may be the norm.

Security is also a top priority for the MAN-758, which integrates multiple security features, including secure boot and hardware-level encryption. These elements are critical for safeguarding sensitive data, especially in connected environments.

The module supports a range of operating systems, providing the flexibility necessary for developers targeting different platforms. This includes not only traditional OS options but also support for various real-time operating systems, which is essential for time-sensitive applications.

Its compact design makes the MAN-758 easy to integrate into various systems, whether for new developments or upgrades to existing systems. Considering these features, it's clear that the American Megatrends MAN-758 is a powerful and versatile module designed to tackle the challenges of modern embedded applications. With its blend of performance, connectivity, and security, it stands out as an excellent choice for developers and engineers looking to build robust, scalable solutions in the ever-evolving tech landscape.