Intel ATOM PROCESSOR N 500 - UPDATE REVISION 001 Page 13 Specification Download | Manualshive

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Summary Tables of Changes

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Summary of Contents for ATOM PROCESSOR N 500 - UPDATE REVISION 001

Page 1: ...Document Number 324341 001 Intel Atom Processor N500 Series Specification Update September 2010 Revision 001...

Page 2: ...ormation here is subject to change without notice Do not finalize a design with this information Intel Atom Processor N500 series may contain design defects or errors known as errata which may cause t...

Page 3: ...Specification Update 3 Contents Preface 5 Identification Information 8 Summary Tables of Changes 10 Errata 14 Specification Changes 31 Specification Clarifications 32 Documentation Changes 33...

Page 4: ...4 Specification Update Revision History Document Number Revision Description Date 324341 001 Initial Release September 2010...

Page 5: ...o longer published in other documents This Affected Documents Document Title Document Number Location1 Intel Atom Processor N400 series and N500 series External Design Specifications EDS Volume 1 4035...

Page 6: ...behavior to deviate from published specifications Hardware and software designed to be used with any given stepping must assume that all errata documented for that stepping are present on all devices...

Page 7: ...hout the product s lifecycle or until a particular stepping is no longer commercially available Under these circumstances errata removed from the specification update are archived and available upon r...

Page 8: ...cates whether the processor is an original OEM processor an OverDrive processor or a dual processor capable of being used in a dual processor system 4 The Family Code corresponds to bits 11 8 of the E...

Page 9: ...arkings SAMPLE MARK EXAMPLE GRP1LINE1 INTEL M C YY e1 GRP2LINE1 FPO S Spec Processor Table 2 Identification Table for Intel Atom Processor N500 Series QDF S Spec MM Product Stepping Processor CPUID Co...

Page 10: ...s stepping Blank No mark This sighting is fixed or does not exist in the listed stepping Status Plan Fix Root caused to a silicon issue and will be fixed in a future stepping Fixed Root caused to a si...

Page 11: ...rmal Interrupts BH11 X No Fix Returning to Real Mode from SMM with EFLAGS VM Set May Result in Unpredictable System Behavior BH12 X No Fix Fault on ENTER Instruction May Result in Unexpected Value on...

Page 12: ...a C State Exit due to a Pending External Interrupt the System May Hang BH31 X No Fix Pending x87 FPU Exceptions MF Following STI May Be Serviced Before Higher Priority Interrupts BH32 X No Fix Benign...

Page 13: ...pecification Changes in this revision of the specification Update Number SPECIFICATION CLARIFICATIONS There are no Specification Clarifications in this revision of the specification Update Number DOCU...

Page 14: ...nt State and higher the result could be a system hang Workaround BIOS must leave the xTPR update transactions disabled default Status For the steppings affected see the Summary Tables of Changes BH2 P...

Page 15: ...vector does not generate an EOI therefore the spurious vector should not be used when writing the LVT Status For the steppings affected see the Summary Tables of Changes BH4 MOV To From Debug Register...

Page 16: ...egister write This will force the store to the APIC register before any subsequent instructions are executed No commercial operating system is known to be impacted by this erratum Status For the stepp...

Page 17: ...bit mode or if a memory address exceeds the 4GB limit while the processor is operating in 32 bit mode Implication FXSAVE FXRSTOR will incur a GP fault due to the memory limit violation as expected but...

Page 18: ...result in unpredictable system behavior Intel has not observed this behavior in commercially available software Workaround SMM software should not change the value of EFLAGS VM in SMRAM Status For the...

Page 19: ...e BP instructions without having an invalid stack during interrupt handling However an enabled debug breakpoint or single step trap may be taken after MOV SS POP SS if this instruction is followed by...

Page 20: ...e Workaround None Status For the steppings affected see the Summary Tables of Changes BH16 BTS Branch Trace Store and PEBS Precise Event Based Sampling May Update Memory outside the BTS PEBS Buffer Pr...

Page 21: ...that is executing the modified code Implication In this case the phrase unexpected or unpredictable execution behavior encompasses the generation of most of the exceptions listed in the Intel Architec...

Page 22: ...May Fail when FREEZE_LBRS_ON_PMI is Set Problem When the FREEZE_LBRS_ON_PMI IA32_DEBUGCTL MSR 1D9H bit 11 is set future writes to IA32_DEBUGCTL MSR may not occur in certain rare corner cases Writes t...

Page 23: ...s the CS segment register between enabling protected mode and the first far JMP Intel 64 and IA 32 Architectures Software Developer s Manual Volume 3A System Programming Guide Part 1 in the section ti...

Page 24: ...or the address range If the two translations differ with respect to page frame permissions or memory type the processor may use a page frame permissions or memory type that corresponds to neither tran...

Page 25: ...errupt the System May Hang Problem Under a precise set of conditions a processor waking from a C state due to a pending external interrupt may not complete the exiting process and the system may hang...

Page 26: ...ssor may hang or may handle the benign exception Intel has not observed this erratum with any commercially available software Workaround None identified Status For the steppings affected see the Summa...

Page 27: ...nabled IA32_APIC_BASE MSR bit 11 set to 1 or do not use MWAIT I O redirection VM entry or RSM to enter an inactive state Status For the steppings affected see the Summary Tables of Changes BH35 IRET u...

Page 28: ...on LVDS clocks LVD_A_CLKP LVD_A_CLKN and data lines LVD_A_DAPAP 2 0 LVD_A_DATAN 2 0 may be observed Due to this erratum a glitch may be seen during power up sequence The glitch is not seen once the LV...

Page 29: ...larly polls and clears the machine check banks as this reduces the likelihood of an overflow condition Status For the steppings affected see the Summary Tables of Changes BH41 FP Data Operand Pointer...

Page 30: ...temperature Due to this erratum a system hang may occur or the processor may proceed to reboot Due to this erratum the system may hang or auto reboot Workaround A BIOS workaround has been identified P...

Page 31: ...Specification Changes Specification Update 31 Specification Changes There are no specification changes in this revision of the specification update...

Page 32: ...Specification Clarifications 32 Specification Update Specification Clarifications There are no specification clarifications in this revision of the specification update...

Page 33: ...Documentation Changes Specification Update 33 Documentation Changes There are no document changes in this revision of the specification update...

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