ALTERA DDR2 SDRAM Controllers Cov lus qhia

ALTERA DDR2 SDRAM Controllers

Cov ntsiab lus zais

1 Cov ntaub ntawv tseem ceeb

2 Tshaj tawm cov ntaub ntawv

3 Device Family Support

4 Nta

5 Unsupported Features

6 MegaCore Kev Tshawb Fawb

7 Kev siv peev txheej

8 Cov Kev Xav Tau

9 Installation thiab Daim Ntawv Tso Cai

10 Cov ntaub ntawv kho dua tshiab

11 Cov ntaub ntawv / Cov ntaub ntawv

11.1 Cov ntaub ntawv

12 Related Posts

Cov ntaub ntawv tseem ceeb

Altera® DDR, DDR2, thiab DDR3 SDRAM Controllers nrog ALTMEMPHY IP muab cov kev sib txuas yooj yim rau kev lag luam-tus qauv DDR, DDR2, thiab DDR3 SDRAM. Lub ALTMEMPHY megafunction yog qhov sib cuam tshuam ntawm lub cim xeeb tswj thiab cov khoom siv nco, thiab ua haujlwm nyeem thiab sau cov haujlwm rau lub cim xeeb. Lub DDR, DDR2, thiab DDR3 SDRAM Controllers nrog ALTMEMPHY IP ua haujlwm ua ke nrog Altera ALTMEMPHY megafunction.
Lub DDR thiab DDR2 SDRAM Controllers nrog ALTMEMPHY IP thiab ALTMEMPHY megafunction muab tag nrho-tus nqi lossis ib nrab-tus nqi DDR thiab DDR2 SDRAM interfaces.The DDR3 SDRAM Controller nrog ALTMEMPHY IP thiab ALTMEMPHY megafunction txhawb DDR3 SDRAM interfaces hauv ib nrab-tus nqi. Lub DDR, DDR2, thiab DDR3 SDRAM Controllers nrog ALTMEMPHY IP muab cov kev ua haujlwm siab II (HPC II), uas muab kev ua haujlwm siab thiab cov yam ntxwv siab heev. Daim duab 15–1 qhia ib daim duab qhia txog kab ke nrog rau tus example top-level file tias DDR, DDR2, lossis DDR3 SDRAM Controller nrog ALTEMPHY IP tsim rau koj.

Daim duab 15–1. System-Level Diagram

Lus Cim rau Daim duab 15–1:
(1) Thaum koj xaiv Instantiate DLL Sab Nraud, ncua sij hawm kaw lub voj (DLL) yog instantiated sab nraum ALTEMPHY megafunction.

MegaWizard ™ Plug-In Manager tsim ib qho example top-level file, suav nrog example tsav tsheb, thiab koj DDR, DDR2, los yog DDR3 SDRAM high-performance xws li kev cai variation. Tus maub los instantiates ib qho piv txwv ntawm ALTMEMPHY megafunction uas nyob rau hauv lem instantiates ib theem-locked voj (PLL) thiab DLL. Koj tseem tuaj yeem cuam tshuam DLL sab nraum ALTMEMPHY megafunction los qhia DLL ntawm ntau zaus ntawm ALTMEMPHY megafunction. Koj tsis tuaj yeem qhia PLL ntawm ntau qhov xwm txheej ntawm ALTEMPHY megafunction, tab sis koj tuaj yeem qhia qee qhov PLL moos tso tawm ntawm ntau qhov xwm txheej no.

© 2012 Altera Corporation. Txhua txoj cai. ALTERA, ARRIA, CYCLONE, HARDCOPY, MAX, MEGACORE, NIOS, QUARTUS thiab STRATIX cov lus thiab lub logo yog cov cim lag luam ntawm Altera Corporation thiab tau sau npe hauv US Patent thiab Trademark Office thiab lwm lub tebchaws. Tag nrho lwm cov lus thiab lub logo uas tau txheeb xyuas tias yog cov cim lag luam lossis cov cim kev pabcuam yog cov cuab yeej ntawm lawv cov neeg tuav haujlwm raws li tau piav qhia ntawm www.altera.com/common/legal.html. Altera lav kev ua tau zoo ntawm nws cov khoom semiconductor rau cov kev qhia tshwj xeeb tam sim no raws li Altera tus qauv warranty, tab sis muaj txoj cai los hloov cov khoom thiab cov kev pabcuam txhua lub sijhawm yam tsis muaj ntawv ceeb toom. Altera xav tias tsis muaj lub luag haujlwm lossis kev lav phib xaub uas tshwm sim los ntawm daim ntawv thov lossis siv cov ntaub ntawv, khoom, lossis kev pabcuam uas tau piav qhia hauv no tshwj tsis yog raws li tau pom zoo los ntawm kev sau ntawv los ntawm Altera. Altera cov neeg siv khoom raug qhia kom tau txais qhov tseeb version ntawm cov cuab yeej tshwj xeeb ua ntej tso siab rau cov ntaub ntawv tshaj tawm thiab ua ntej muab xaj rau cov khoom lossis cov kev pabcuam.

Cov example top-level file yog ib tug tag nrho-functional tsim uas koj yuav simulate, synthesize, thiab siv nyob rau hauv kho vajtse. Cov example tsav tsheb yog qhov ntsuas tus kheej uas teeb meem nyeem thiab sau cov lus txib rau tus maub los thiab tshawb xyuas cov ntaub ntawv nyeem kom tsim cov ntawv hla lossis tsis ua tiav, thiab sim ua tiav cov cim.
Lub ALTMEMPHY megafunction tsim cov datapath ntawm lub cim xeeb ntaus ntawv thiab lub cim xeeb tswj. Lub megafunction yog muaj nyob rau hauv ib tug stand-alone khoom los yog yuav siv tau ua ke nrog lub Altera high-performance nco maub los.
Thaum siv ALTEMPHY megafunction raws li cov khoom lag luam ib leeg, siv nrog cov kev cai lossis lwm tus neeg tswj hwm.

Rau cov qauv tsim tshiab, Altera pom zoo kom siv UniPHY-raws li lwm lub cim xeeb interface, xws li DDR2 thiab DDR3 SDRAM controllers nrog UniPHY, QDR II thiab QDR II + SRAM controllers nrog UniPHY, lossis RLDRAM II maub los nrog UniPHY.

Tshaj tawm cov ntaub ntawv

Table 15–1 muab cov ntaub ntawv hais txog qhov kev tso tawm ntawm DDR3 SDRAM Controller nrog ALTEMPHY IP.

Rooj 15–1. Tshaj tawm cov ntaub ntawv

Yam khoom	Kev piav qhia
Version	11.1
Hnub tso tawm	Kaum Ib Hlis 2011
Ordering Codes	IP-SDRAM/HPDDR (DDR SDRAM HPC) IP-SDRAM/HPDDR2 (DDR2 SDRAM HPC) IP-HPMCII (HPC II)
Cov khoom ID	00BE (DDR SDRAM) 00BF (DDR2 SDRAM) 00C2 (DDR3 SDRAM) 00CO (ALTMEMPHY Megafunction)
Tus neeg muag khoom ID	6 AB 7

Altera txheeb xyuas tias qhov tam sim no version ntawm Quartus® II software suav nrog cov version dhau los ntawm txhua qhov haujlwm MegaCore. MegaCore IP Lub Tsev Qiv Ntawv Tshaj Tawm thiab Errata tshaj tawm cov kev zam rau qhov kev pov thawj no. Altera tsis txheeb xyuas qhov muab tso ua ke nrog MegaCore muaj nuj nqi versions laus dua ib qho kev tso tawm. Yog xav paub txog cov teeb meem ntawm DDR, DDR2, los yog DDR3 SDRAM high-performance maub los thiab ALTMEMPHY megafunction nyob rau hauv ib qho kev Quartus II version, xa mus rau Quartus II Software Release Notes.

Device Family Support

Table 15–2 txhais cov cuab yeej txhawb nqa qib rau Altera IP cores.

Table 15–2. Altera IP Core Device Support Levels

FPGA Cov Tsev Neeg	Cov Tsev Neeg HardCopy
Kev txhawb nqa ua ntej-Cov tub ntxhais IP raug txheeb xyuas nrog cov qauv ua ntej lub sijhawm rau tsev neeg cov cuab yeej no. Cov tub ntxhais IP ua tau raws li txhua qhov kev xav tau ua haujlwm, tab sis tseem tuaj yeem tshawb xyuas lub sijhawm rau tsev neeg lub cuab yeej. Nws tuaj yeem siv rau hauv kev tsim khoom tsim nrog ceev faj.	HardCopy Khub-Cov tub ntxhais IP raug txheeb xyuas nrog cov qauv ua ntej lub sijhawm rau Hard Copy ntaus ntawv. Cov tub ntxhais IP ua tau raws li txhua qhov yuav tsum tau ua, tab sis tseem tuaj yeem tshawb xyuas lub sijhawm rau HardCopy cuab yeej tsev neeg. Nws tuaj yeem siv rau hauv kev tsim khoom tsim nrog ceev faj.
Kev txhawb nqa zaum kawg-Cov tub ntxhais IP raug txheeb xyuas nrog cov qauv sijhawm kawg rau tsev neeg cov cuab yeej no. Cov tub ntxhais IP ua tau raws li txhua qhov kev ua haujlwm thiab lub sijhawm ua haujlwm rau tsev neeg cov cuab yeej thiab tuaj yeem siv rau hauv cov qauv tsim khoom.	HardCopy Compilation-Cov tub ntxhais IP raug txheeb xyuas nrog lub sijhawm kawg ua qauv rau tsev neeg HardCopy. Cov tub ntxhais IP ua tau raws li txhua qhov kev ua haujlwm thiab lub sijhawm ua haujlwm rau tsev neeg cov cuab yeej thiab tuaj yeem siv rau hauv cov qauv tsim khoom.

Table 15–3 qhia txog qib kev txhawb nqa los ntawm DDR, DDR2, thiab DDR3 SDRAM Controllers nrog ALTMEMPHY IP rau Altera cov tsev neeg.

Table 15–3. Device Family Support

Device Family	raws tu qauv
Device Family	DDR thiab DDR2	DDR 3
Arria® GX	Kawg	Tsis muaj kev txhawb nqa
Arria II GX	Kawg	Kawg
Cyclone® III	Kawg	Tsis muaj kev txhawb nqa
Cyclone III LS	Kawg	Tsis muaj kev txhawb nqa
Cyclone IV E	Kawg	Tsis muaj kev txhawb nqa
Cyclone IV GX	Kawg	Tsis muaj kev txhawb nqa
HardCopy II	Xa mus rau Dab Tsi Tshiab hauv Altera IP nplooj ntawv ntawm Altera webqhov chaw.	Tsis muaj kev txhawb nqa
Stratix® II	Kawg	Tsis muaj kev txhawb nqa
Stratix II GX	Kawg	Tsis muaj kev txhawb nqa
Lwm cov cuab yeej cuab tam	Tsis muaj kev txhawb nqa	Tsis muaj kev txhawb nqa

Nta

ALTMEMPHY Megafunction

Table 15–4 qhia txog qhov tseem ceeb ntawm kev txhawb nqa rau ALTMEMPHY megafunction.

Table 15–4. ALTMEMPHY Megafunction Feature Support

Feature	DDR thiab DDR2	DDR 3
Kev them nyiaj yug rau Altera PHY Interface (AFI) ntawm txhua yam khoom siv txhawb nqa.	✓	✓
Automated pib calibration tshem tawm nyuaj nyeem cov ntaub ntawv sij hawm xam.	✓	✓
Voltage thiab kub (VT) taug qab uas lav qhov kev ua haujlwm ruaj khov siab tshaj plaws rau DDR, DDR2, thiab DDR3 SDRAM interfaces.	✓	✓
Tus kheej-muaj datapath uas ua rau kev sib txuas mus rau Altera maub los lossis tus neeg thib peb tus tswj tsis pub dhau lub sijhawm tseem ceeb.	✓	✓
Full-rate interface	✓	—
Ib nrab-rate interface	✓	✓
Ib qho yooj yim-rau-siv parameter editor	✓	✓

Tsis tas li ntawd, ALTEMPHY megafunction txhawb nqa DDR3 SDRAM yam tsis muaj qib:

Lub ALTMEMPHY megafunction txhawb nqa DDR3 SDRAM Cheebtsam yam tsis muaj qib rau Arria II GX cov khoom siv T-topology rau moos, chaw nyob, thiab tsheb npav:
- Txhawb ntau yam nti xaiv.
Lub DDR3 SDRAM PHY yam tsis muaj theem fMAX yog 400 MHz rau ib nti xaiv.

Tsis muaj kev txhawb nqa rau cov ntaub ntawv npog (DM) tus pins rau × 4 DDR3 SDRAM DIMMs lossis cov khoom siv, yog li xaiv Tsis yog rau Tsav DM pins los ntawm FPGA thaum siv × 4 khoom siv.
Lub ALTMEMPHY megafunction txhawb nqa ib nrab-tus nqi DDR3 SDRAM interfaces nkaus xwb.

High-Performance Controller II

Table 15–5 qhia txog qhov tseem ceeb ntawm kev txhawb nqa rau DDR, DDR2, thiab DDR3 SDRAM HPC II.

Table 15–5. Kev them nyiaj yug Feature (Part 1 ntawm 2)

Feature	DDR thiab DDR2	DDR 3
Ib nrab tus nqi tswj	✓	✓
Kev them nyiaj yug rau AFI ALTEMPHY	✓	✓
Kev them nyiaj yug rau Avalon® Memory Mapped (Avalon-MM) hauv zos interface	✓	✓

Table 15–5. Kev them nyiaj yug Feature (Part 2 ntawm 2)

Feature	DDR thiab DDR2	DDR 3
Configurable hais kom ua saib-ua ntej lub txhab nyiaj tswj hwm nrog kev txiav txim nyeem thiab sau ntawv	✓	✓
Ntxiv latency	✓	✓
Kev them nyiaj yug rau arbitrary Avalon tawg ntev	✓	✓
Built-in saj zawg zog nco tawg adapter	✓	✓
Configurable Local-to-Memory chaw nyob mappings	✓	✓
Kev xaiv khiav-lub sij hawm configuration ntawm qhov loj me thiab hom sau npe chaw, thiab lub sijhawm nco	✓	✓
Ib nrab array self-refresh (PASR)	✓	✓
Kev them nyiaj yug rau kev lag luam-tus qauv DDR3 SDRAM li	✓	✓
Kev them nyiaj yug rau tus kheej-refresh hais kom ua	✓	✓
Kev txhawb nqa rau tus neeg siv-tswj hwj chim-down hais kom ua	✓	✓
Kev txhawb nqa tsis siv neeg lub hwj chim-down hais kom ua nrog cov programmable time-out	✓	✓
Kev txhawb nqa rau nws pib-precharge nyeem thiab pib-precharge sau cov lus txib	✓	✓
Kev txhawb nqa rau tus neeg siv-tswj refresh	✓	✓
Kev xaiv ntau lub moos sib koom hauv SOPC Builder Flow	✓	✓
Integrated yuam kev kho coding (ECC) muaj nuj nqi 72-ntsis	✓	✓
Integrated ECC muaj nuj nqi, 16, 24, thiab 40-ntsis	✓	✓
Kev them nyiaj yug rau ib nrab-lo lus sau nrog kev xaiv tsis siv neeg kho qhov yuam kev	✓	✓
SOPC Builder npaj txhij
Kev them nyiaj yug rau kev ntsuam xyuas OpenCore Plus	✓	✓
IP ua haujlwm simulation qauv siv rau hauv Altera-txhawb VHDL thiab Verilog HDL simulator	✓	✓

Lus Cim rau Table 15–5:

HPC II txhawb kev ntxiv latency qhov tseem ceeb ntau dua los yog sib npaug rau tRCD-1, hauv lub voj voog moos (tCK).

Cov yam ntxwv no tsis txaus siab nrog DDR3 SDRAM nrog qib theem.

Unsupported Features

Table 15–6 qhia txog cov yam ntxwv tsis txaus siab rau Altera's ALTMEMPHY-raws li lwm lub cim xeeb interfaces.

Table 15–6. Unsupported Features

Memory Protocol	Cov yam ntxwv tsis txaus ntseeg
DDR thiab DDR2 SDRAM	Lub sijhawm simulation
	tawg Length ntawm 2
	Kev tawg ib nrab thiab tsis sib haum xeeb tawg hauv ECC thiab tsis yog-ECC hom thaum DM pins raug xiam
DDR3 SDRAM	Lub sijhawm simulation
	Kev tawg ib nrab thiab tsis sib haum xeeb tawg hauv ECC thiab tsis yog-ECC hom thaum DM pins raug xiam
	Stratix III thiab Stratix IV
	Kev them nyiaj yug DIMM
	Full-rate interfaces

MegaCore Kev Tshawb Fawb

Altera ua ntau yam sib txawv, qhia cov kev sim nrog kev ntsuas kev ua haujlwm siv cov qauv kev lag luam-tus qauv Denali los xyuas kom meej qhov ua haujlwm ntawm DDR, DDR2, thiab DDR3 SDRAM Controllers nrog ALTMEMPHY IP.

Kev siv peev txheej

Tshooj lus no muab cov ntaub ntawv siv cov ntaub ntawv siv tau zoo rau cov tswj hwm kev nco sab nraud nrog ALTEMPHY rau cov tsev neeg cov cuab yeej txhawb nqa. Cov ntaub ntawv no tsuas yog muab raws li cov lus qhia; rau cov ntaub ntawv siv cov ntaub ntawv meej, koj yuav tsum tsim koj tus IP core thiab xa mus rau cov ntawv ceeb toom tsim los ntawm Quartus II software.
Table 15–7 qhia txog kev siv cov ntaub ntawv siv rau ALTMEMPHY megafunction, thiab DDR3 high-performance controller II rau Arria II GX li.

Table 15–7. Kev siv peev txheej hauv Arria II GX Devices (Part 1 ntawm 2)

raws tu qauv	Nco Dav (ntsis)	Kev sib xyaw ua ke ALUTS	Logic Sau npe	Mem ALUTs	M9K Thaiv	M144K Thaiv	Nco y (Bit)
Tus tswj
DDR 3 (Ib nrab nqi)	8	1,883	1,505	10	2	0	4,352
	16	1,893	1,505	10	4	0	8,704
	64	1,946	1,521	18	15	0	34,560
	72	1,950	1,505	10	17	0	39,168

Table 15–7. Kev siv peev txheej hauv Arria II GX Devices (Part 2 ntawm 2)

raws tu qauv	Nco Dav (ntsis)	Kev sib xyaw ua ke ALUTS	Logic Sau npe	Mem ALUTs	M9K Thaiv	M144K Thaiv	Nco y (Bit)
Controller + PHY
DDR 3 (Ib nrab nqi)	8	3,389	2,760	12	4	0	4,672
	16	3,457	2,856	12	7	0	9,280
	64	3,793	3,696	20	24	0	36,672
	72	3,878	3,818	12	26	0	41,536

Table 15–8 qhia txog kev siv cov ntaub ntawv siv rau DDR2 kev ua haujlwm siab thiab kev tswj xyuas ntxiv rau PHY, rau ib nrab-tus nqi thiab tag nrho-tus nqi configurations rau Arria II GX li.

Table 15–8. Kev siv DDR2 hauv Arria II GX Devices

raws tu qauv	Nco Dav (ntsis)	Kev sib xyaw ua ke ALUTS	Logic Sau npe	Mem ALUTs	M9K Thaiv	M144K Thaiv	Nco (Bits)
Tus tswj
DDR 2 (Ib nrab nqi)	8	1,971	1,547	10	2	0	4,352
	16	1,973	1,547	10	4	0	8,704
	64	2,028	1,563	18	15	0	34,560
	72	2,044	1,547	10	17	0	39,168
DDR 2 (Tag nrho tus nqi)	8	2,007	1,565	10	2	0	2,176
	16	2,013	1,565	10	2	0	4,352
	64	2,022	1,565	10	8	0	17,408
	72	2,025	1,565	10	9	0	19,584
Controller + PHY
DDR 2 (Ib nrab nqi)	8	3,481	2,722	12	4	0	4,672
	16	3,545	2,862	12	7	0	9,280
	64	3,891	3,704	20	24	0	36,672
	72	3,984	3,827	12	26	0	41,536
DDR 2 (Tag nrho tus nqi)	8	3,337	2,568	29	2	0	2,176
	16	3,356	2,558	11	4	0	4,928
	64	3,423	2,836	31	12	0	19,200
	72	3,445	2,827	11	14	0	21,952

Table 15–9 qhia txog kev siv cov ntaub ntawv siv rau DDR2 kev ua haujlwm siab thiab kev tswj xyuas ntxiv rau PHY, rau ib nrab-tus nqi thiab tag nrho-tus nqi configurations rau Cyclone III li.

Table 15–9. Kev siv DDR2 hauv Cyclone III Devices

raws tu qauv	Nco Dav (ntsis)	Logic Sau npe	Logic Cells	M9K Blocks	Nco (Bits)
Tus tswj
DDR 2 (Ib nrab nqi)	8	1,513	3,015	4	4,464
	16	1,513	3,034	6	8,816
	64	1,513	3,082	18	34,928
	72	1,513	3,076	19	39,280
DDR 2 (Tag nrho tus nqi)	8	1,531	3,059	4	2,288
	16	1,531	3,108	4	4,464
	64	1,531	3,134	10	17,520
	72	1,531	3,119	11	19,696
Controller + PHY
DDR 2 (Ib nrab nqi)	8	2,737	5,131	6	4,784
	16	2,915	5,351	9	9,392
	64	3,969	6,564	27	37,040
	72	4,143	6,786	28	41,648
DDR 2 (Tag nrho tus nqi)	8	2,418	4,763	6	2,576
	16	2,499	4,919	6	5,008
	64	2,957	5,505	15	19,600
	72	3,034	5,608	16	22,032

Cov Kev Xav Tau

Lub DDR3 SDRAM Controller nrog ALTMEMPHY IP yog ib feem ntawm MegaCore IP Library, uas tau muab faib nrog Quartus II software thiab rub tawm los ntawm Altera webqhov chaw, www.altera.com.

Rau qhov yuav tsum tau ua thiab cov lus qhia kev teeb tsa, xa mus rau Altera Software Installation & Licensing.

Installation thiab Daim Ntawv Tso Cai

Daim duab 15–2 qhia cov qauv qhia tom qab koj nruab DDR3 SDRAM Controller nrog ALTEMPHY IP, qhov twg yog lub installation directory. Lub default installation directory ntawm Windows yog c:\altera\ ; ntawm Linux nws yog /opt/altera .

Daim duab 15–2. Directory Structure

Koj xav tau daim ntawv tso cai rau MegaCore muaj nuj nqi tsuas yog thaum koj txaus siab rau nws cov kev ua haujlwm thiab kev ua tau zoo, thiab xav coj koj tus qauv tsim rau kev tsim khoom.
Txhawm rau siv DDR3 SDRAM HPC, koj tuaj yeem thov daim ntawv tso cai file los ntawm Altera web site ntawm www.altera.com/licensing thiab nruab nws rau koj lub computer. Thaum koj thov daim ntawv tso cai file, Altera xa email rau koj daim ntawv tso cai.dat file. Yog tias koj tsis muaj Internet, hu rau koj tus neeg sawv cev hauv zos.
Txhawm rau siv DDR3 SDRAM HPC II, hu rau koj tus neeg muag khoom hauv zos kom xaj daim ntawv tso cai.

Kev ntsuam xyuas dawb

Altera's OpenCore Plus kev ntsuam xyuas feature tsuas yog siv tau rau DDR3 SDRAM HPC. Nrog rau OpenCore Plus kev ntsuam xyuas feature, koj tuaj yeem ua cov haujlwm hauv qab no:

Simulate tus cwj pwm ntawm megafunction (Altera MegaCore muaj nuj nqi lossis AMPPSM megafunction) hauv koj lub cev.
Txheeb xyuas qhov ua haujlwm ntawm koj tus qauv tsim, nrog rau ntsuas nws qhov loj me thiab nrawm nrawm thiab yooj yim.

Tsim cov cuab yeej siv sijhawm txwv files rau cov qauv tsim uas suav nrog MegaCore cov haujlwm.
Program ib lub cuab yeej thiab txheeb xyuas koj tus qauv tsim hauv kho vajtse.

Koj yuav tsum tau yuav daim ntawv tso cai rau lub megafunction tsuas yog thaum koj txaus siab rau nws cov functionality thiab kev ua tau zoo, thiab xav coj koj tus tsim rau ntau lawm.

OpenCore Ntxiv Tus Cwj Pwm Sijhawm Tawm

OpenCore Plus kev ntsuas kho vajtse tuaj yeem txhawb nqa ob hom kev ua haujlwm hauv qab no:

Untethered - tus tsim ua haujlwm rau lub sijhawm txwv

Tethered-yuav tsum muaj kev sib txuas ntawm koj lub rooj tsavxwm thiab lub tshuab computer. Yog tias tethered hom tau txais kev txhawb nqa los ntawm txhua qhov megafunctions hauv kev tsim, lub cuab yeej tuaj yeem ua haujlwm ntev dua lossis tsis muaj sijhawm.

Tag nrho cov megafunctions nyob rau hauv ib lub sij hawm tawm ntawm lub ntaus ntawv ib txhij thaum lub sij hawm soj ntsuam nruj tshaj plaws mus txog. Yog tias muaj ntau tshaj li ib lub megafunction hauv ib qho kev tsim, ib qho mega muaj nuj nqi lub sij hawm tawm tus cwj pwm yuav raug npog los ntawm lub sij hawm tawm tus cwj pwm ntawm lwm yam megafunctions.

Rau MegaCore kev ua haujlwm, lub sijhawm tsis muaj sijhawm tawm yog 1 teev; tethered time-out tus nqi yog indefinite.

Koj tus qauv tsim tsis ua haujlwm tom qab lub sijhawm ntsuas kho vajtse tas sij hawm thiab cov khoom tso tawm hauv zos_ready mus qis.

Cov ntaub ntawv kho dua tshiab

Table 15–10 teev cov keeb kwm kho dua tshiab rau daim ntawv no.

Table 15–10. Cov ntaub ntawv kho dua tshiab

Hnub tim	Version	Hloov
Kaum Ib Hlis 2012	1.2	Hloov tus lej ntawm 13 mus rau 15.
Lub Rau Hli 2012	1.1	Ntxiv tswv yim icon.
Kaum Ib Hlis 2011	1.0	Cov ntaub ntawv tso tawm ua ke, Kev Pabcuam Tsev Neeg, Cov Ntawv Teev Npe, thiab Cov Npe Tsis Txaus Siab rau DDR, DDR2, thiab DDR3.