SST39VF040為SST公司設計的512KByte閃存

1、AT89C51AT89C51對SSTSST之FLASHFLASH的編程操作詳述Flash 又名閃存，屬于EEPROM,即電可擦除可編程的存儲器。由于具有電可擦除的特性，并且其數(shù)據(jù)可保留上百年，所以它的應用范圍非常廣泛。非常適用于作為MicroChip以及DSP的外部程序存儲器，或者作為需要存儲大量數(shù)據(jù)的外部EEPROMoSST 公司設計之39系列Multi-PurposeFlash,按照其存儲的空間主要分以下幾種：64Kx8/128Kx8/256Kx8/512Kx8Byte,各自代表的芯片型號有：SST39LF512/SST39LF010SST39LF512/SST39LF010/ /SST3

2、9LF020SST39LF020/ /SST39LF040SST39VSST39LF040SST39VF512F512/ /SST39VF01SST39VF010/0/SST39VF020SST39VF020/ /SST39VF040SST39VF04039 系列Flash之特性：SST39LF512/010/020/040工作電壓為3.0-3.6V;SST39VF512/010/020/040工作電壓為2.7V3.6V;數(shù)據(jù)保留時間100年；工作電流典型值為10mA,待機電流為1uA;快速擦除芯片時間為70ms,字節(jié)編程時間為14uso對芯片有女口下操作：chipEraseoperation

3、;sectorEraseoperation;byteprogramoperation；bytereadoperation；writeoperationstatusdetection。通過軟件對芯片的操作可以訪問到SST制造商的ID;以及芯片的ID,各芯片ID如下表：TABLE1:PRODUCTIDENTIFICATIONAddressDataManufacturersID0000HBFHDeviceIDSST39LF/VF5120001HD4HSST39LF/VF0100001HD5HSST39LF/VF0200001HD6HSST39LF/VF0400001HD7H注意：當通過軟件訪問了Pr

4、oductIdentification后，必須采用軟件命令退出該模式才能對芯片進行擦除、讀寫的操作.卜面給出各軟件操作指令的時序圖:INTERNALPROGRAMOPERATIONSTARTSTBFNote:As=Musisignlficanliddre&5AMg=AirierSSTSStF/VFSIS.AforSST39LFFO1O,從17farSST39LF/VF02OandAg忙葉SST39LF-VF040FIGUREFIGURE 5:5:WE#WE#CONTROLLEDPROGRAMCYCLETIMINGDIAGRAM2.CE控制的字節(jié)編程時序圖:III正RNALPROGRAM

5、OPERATIONSRTSTEPNoteNote：Af.js=MostMostsignificantaddressA|s=A1SforSSTMLF/VF51,A16forSSTMLF/VF010,1.WE控制的字節(jié)編程時序:ADDRESSAMS-0S口SWOSWiSW2BYTEBYTEi.ADDRDflTA；r9rff&3 3 倍 ILLFMILLFM。X56試X2AgX X5s器X XADDRxxxxxxxxxxxxxx彳FCPH*TDHJTMEMEJADDRDATAJADDRDATA) )395ILLF06JO* *TDHTDHWE事TAPOE#ATAAi7RMS8T39LF/VF

6、Q(2Cisndfcr8ST39LFVF040FIGUREFIGURE 6:6:CEACEACONTROLLEDPROGRAMCYCLETIP用NGDIAGRAMADL.RESSAM&.0XYXX、父訃&WOTFIGUREFIGURE 7:7:DATA#POLUNGTIMINGDIAGRAM4.WE控制的扇區(qū)擦除時序圖:3M111RJBO3M111RJBONote：ThealsosupportsCE#controlledSailor-Erasqpgiraiicii.ThsWE#ardCE#signalsarein怕忙砧g白曲招l(wèi)ongasmlwnimWnlnigsaren%t(

7、Seelatileno)ADDRESSADDRESSCEsCEsOEtOEtWEWE UU*SIX-BYTECODEFOGSECTOfl-EHASE*5S&5X2AAAj(2AAAj(55656555/2AMX)(X/AZ4Z4/AZ4wwwwAAx晶X即)其力X%x%SWOswiSW2SWSSW4SW5SW4SW5TSExxxxxrnxECzzzzzzjf-7?CE#CE#OE再WEsDQDQ7 7Nksle:4Msi=Moslagnilicantaddress“MS三A15lorA15lorSST39Lr.Vr512,AforSST39LFVFOWrA17lorSST39LF/VF

8、B。andAjBtorSST39LF/VF040SAxSAx= =S S 前:舊 AddAdd 伯第R|i11s=MlslgnillcnladdressA AU US S-A-A1 1510rSST3aF.VF512,A510rSST3aF.VF512,A1fl1flHSSTagLF.VFDIO,AHSSTagLF.VFDIO,A1717IbrIbrS5T3SLFJVF02DandAandAlSlSlnrlnrSST3SLFiVFO4OSST3SLFiVFO4O331ILLF17*Note：加店口的歸自alsosupportsCEfr8nllDUEcnp-Era&soperaiion.

9、TMWEandCEfrsignalsarein比忙h嶗白&l白招l(wèi)ong孤minmumllmmgsimefl.(SegTadeiQiA|s=tgnilnl最*總帖AusaA15forSina.F/VF512,ItirSST3SLF.VRH0,7IOr-SSTMIFWOnJAia1tirSST30LRVFWQFIGURE10:WE#FIGURE10:WE#CONTROLLEDCHHIP-ERASETIMINGDIAGRAM6.軟件訪問ID的時序圖:Note：DwkeIID-DIHIcrSST3QLRVFS12,D5HforSSTMLRVFCrlD.D6Hfar5ST3BLRVF020an

10、dID7WfarSSlTaaLRVFtMO.* *SIX-BYTECODEFORCHP-ERA&ESIX-BYTECODEFORCHP-ERA&EADDRESSAMS0ZXTSCExxxxxrnxB/:上fTifTiTKTKf7f7口口7.Q1010lMXAAX55SW35W45W5&55bX罡而XS555&5552AAA%5雙TWHPTWHPSWOSW1SW2FIGURE12:FIGURE12:SOFTWAREIDIDEXITANDRESET根據(jù)上面的時序圖，下面給出各種軟件指令操作的流程圖:1 .字節(jié)編程流程圖:TbRGEBYTESEQUENCEFORSOF

11、TWARESOFTWAREIDEXITANDRESETANDRESETADDRESSA-|4電D07D07M2 2OEJ-WES- -X&ES5-)CjAAAXX&ES5-)CjAAAXS&SSS&SS/wWViWWW*WAX3flSIULnO.DLoaddata：AAHAddress:5555HSoftwareIDEntryCommandSequenceSoftwareIDExitSoftwareIDExit& &ReetCommandSequenceReetCommandSequence3.復位命令流程圖:Returntonormaloper

12、ation3B5111F1523B5111F1522.讀取ID流程圖:Chip-EraseComimandlSequenceSector-EraseSector-EraseCommandSequenceCommandSequence4.芯片擦除命令流程圖:5.扇區(qū)擦除命令流程圖:下面以SST39VF040SST39VF040為歹U,給出AT89C51AT89C51對其做編程動作的sourcecodesourcecodeSST39VF040地址線為A0-A18,數(shù)據(jù)線為DQ0DQ7,片選線CE,數(shù)據(jù)寫使能線WE,數(shù)據(jù)讀使能線OEo#defineucharunsignedchar#defineui

13、ntunsignedint#defineulongunsignedlongsfrDataOut=0 x80;/定義P0口接SST39VF040的數(shù)據(jù)線sfrAddress7_0=0 x90;/定義P1口接SST39VF040的地址線A0-A7sfrAddress15_8=0 xa0;/定義P2口接SST39VF040的地址線A8-A15sbitAddress16=P3A2;/定義P3.2接SST39VF040的地址線A16sbitAddress17=P3A3;/定義P3.3接SST39VF040的地址線A17sbitAddress18=P3A4;/定義P3.4接SST39VF040的地址線A1

14、8sbitSst39vf040_Ce=P3A5;/定義P3.5接SST39VF040的片選線線CEsbitSst39vf040_We=P3A6;/定義P3.6接SST39VF040的寫使能線WEsbitSst39vf040_Oe=P3A7;/定義P3.7接SST39VF040的讀使能線OEstructFlashucharmanufacturer_id;uchardevice_id;ulongaddress;Sst39vf040;FLASH的manfacturer_ID,device_ID,出口參數(shù)返回1,0ucharRead_Id(ucharmanfa_id,uchardevi_id)Sst3

15、9vf040_Ce=1;Sst39vf040_We=1;Address7_0=0 x55;Address15_8=0 x55;Sst39vf040_Oe=1;Sst39vf040_Ce=0;Sst39vf040_We=0;DataOut=0 xaa;Sst39vf040_We=1;Address7_0=0 xaa;Address15_8=0 x2a;Delay10us();Sst39vf040_We=0;DataOut=0 x55;Delay10us();Sst39vf040_We=1;Address7_0=0 x55;Address15_8=0 x55;Delay10us();Sst39vf

16、040_We=0;DataOut=0 x90;Sst39vf040_We=1;Sst39vf040_Ce=1;Delay10us();Address7_0=0 x00;Address15_8=0 x00;Sst39vf040_Ce=0;Sst39vf040_Oe=0;DataOut=0 xff;Sst39vf040.manufacturer_id=DataOut;Address7_0=0 x01;Delay10us();Sst39vf040.device_id=DataOut;讀FLASHID的函數(shù)，入口參數(shù):Sst39vf040_Ce=1;if(Sst39vf040.manufacturer

17、_id=manuf_ID)&(Sst39vf040.device_id=devi_ID)return1;elsereturn0;/退出讀ID的狀態(tài)以及命令FLASH復位的函數(shù)voidRead_Id_Exit(void)Sst39vf040_Ce=1;Sst39vf040_Oe=0;Sst39vf040_We=1;Address7_0=0 x55;Address15_8=0 x55;Sst39vf040_Ce=0;Sst39vf040_Oe=1;Sst39vf040_We=0;Delay10us();DataOut=0 xaa;Sst39vf040_We=1;Delay10us();Ad

18、dress7_0=0 xaa;Address15_8=0 x2a;Delay10us();Sst39vf040_We=0;Delay10us();DataOut=0 x55;Sst39vf040_We=1;Delay10us();Address7_0=0 x55;Address15_8=0 x55;Delay10us();Sst39vf040_We=0;Delay10us();DataOut=0 xf0;Sst39vf040_We=1;Sst39vf040_Ce=1;Delay10us();Sst39vf040_Ce=0;芯片擦除函數(shù)voidChip_Erase(void)Sst39vf040

19、_Ce=1;Sst39vf040_Oe=0;Sst39vf040_We=1;Address18=0;Address17=0;Address16=0;Address7_0=0 x55;Address15_8=0 x55;Sst39vf040_Ce=0;Sst39vf040_Oe=1;Sst39vf040_We=0;DataOut=0 xaa;Delay10us();Sst39vf040_We=1;Address7_0=0 xaa;Address15_8=0 x2a;Delay10us();Sst39vf040_We=0;DataOut=0 x55;Delay10us();Sst39vf040_W

20、e=1;Address7_0=0 x55;Address15_8=0 x55;Delay10us();Sst39vf040_We=0;DataOut=0 x80;Delay10us();Sst39vf040_We=1;Delay10us();Sst39vf040_We=0;DataOut=0 xaa;Delay10us();Sst39vf040_We=1;Address7_0=0 xaa;Address15_8=0 x2a;Delay10us();Sst39vf040_We=0;DataOut=0 x55;Delay10us();Sst39vf040_We=1;Address7_0=0 x55

21、;Address15_8=0 x55;Delay10us();Sst39vf040_We=0;DataOut=0 x10;Delay10us();Sst39vf040_We=1;while(!Wait_Data_Pulling();/檢測FLASH編程，擦除操作過程中是否完成的函數(shù)，完成后返回值1ucharWait_Data_Pulling(void)ucharoutdata;Sst39vf040_Ce=1;Sst39vf040_We=1;Sst39vf040_Oe=1;Delay10us();Sst39vf040_Ce=0;Sst39vf040_Oe=0;Delay10us();DataOu

22、t=0 xff;outdata=DataOut;Sst39vf040_Ce=1;Sst39vf040_Oe=1;if(outdata&0 x80)=0 x80)return1;elsereturn0;字節(jié)編程函數(shù)，入口參數(shù)：(byte_address：AmsA0=A18A0,待寫的數(shù)據(jù):voidWe_Byte_Program(ulongbyte_address,ucharbyte_data)(ulongtemp_address;Sst39vf040_Ce=1;Sst39vf040_Oe=0;Sst39vf040_We=1;Address7_0=0 x55;Address15_8=0 x

23、55;Address16=0;Address17=0;Address18=0;byte_data),Sst39vf040_Ce=0;Sst39vf040_Oe=1;Sst39vf040_We=0;DataOut=0 xaa;Delay10us();Sst39vf040_We=1;Address7_0=0 xaa;Address15_8=0 x2a;Delay10us();Sst39vf040_We=0;DataOut=0 x55;Delay10us();Sst39vf040_We=1;Address7_0=0 x55;Address15_8=0 x55;Delay10us();Sst39vf0

24、40_We=0;DataOut=0 xa0;Delay10us();Sst39vf040_We=1;temp_address=byte_address;Address7_0=temp_address&0 x0000ff;temp_address=byte_address;Address15_8=(temp_address&0 x00ff00)8;temp_address=byte_address;if(temp_address&0 x010000)!=0)Address16=1;elseAddress16=0;temp_address=byte_address;if(temp_address&0 x020000)!=0)Address17=1;elseAddress17=0;temp_address=byte_address;if(temp_address&0 x040000)!=0)Address18=1;elseAddress18=0;Delay10us();Sst39vf040_We=0;DataOut=byte_data;D