SST39VF400 芯片简介
description
Transcript of SST39VF400 芯片简介
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SST39VF400
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SST39VF400256K16bitCMOSFlash,2.7~3.6V.70ns(VF400-70) 90ns (VF400-90);18ms;70ms;()14us.,./,100.
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.TSOP./CE:/OE:/WE:NC:VSS:VDD:(2.6~3.7V)A17~A0:18.. A17~A11;,A17~A15.DQ15~DQ0:/.,,/OE/CE,.
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FlashA17~A0DSPA17~A0/ DQ15~DQ0DSPD15~D0. /CE, /OE, /WE16245CPLDI/O,DSP/MSTROB()R/W(/)CPLD. VDDTPS767D3183.3V, VSS.
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. (6) Mode /CE /OE /WE DQ VIL VIL VIH DOUT VIL VIH VIL DIN VIL VIH VIL X VIH X X High Z X VIL X High Z/ DOUT X X VIH High Z/ DOUT VIL VIL VIH (00BF) (2780) VIL VIL VIH
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1./CE/OE,:(>=7090ns),0
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2. SST39VF400. :./CE/WE,/CE/WE./CE/WE,20us,. .
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(1)/WE(=30ns,>=30ns
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(2)/CE
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3. ,1.. (10H)5555H6,./WE/CE,. .()
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4./:,./:,.,. /Data(DQ7):,DQ7,,DQ7,.,DQ70,,DQ71.
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(DQ6):,DQ6010101,, DQ6.:. SST39VF400;..SST39VF400Flash(CFI).CFI,CFI,.CFI.
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CFI, (ID),...: SST39VF400,.5ns/WE/CE();VDD1.5V,.,/OE,/CE/WE..
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: SST39VF400,,IDD,.,.
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.DSP FlashDSP.DSPMC(),,(PC) Bootloader(DSPROM) (0FF80H),.816,,boot,,.
. ,ROM0xff80bootloader bootloader HPIIO,0XFFFF ,boot , ,PC,.
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DSPFlash
,FlashDSP.
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Flash,Flash,boot. 18000h-1ffffh ffffhboot.DSPFlashFlash:
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: (1)A14~A0,A15~A17 (2)SAX,A17~A11; BAX,A17~A15 (3)WA