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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320VC5507 датащи(PDF) 73 Page - Texas Instruments |
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TMS320VC5507 датащи(HTML) 73 Page - Texas Instruments |
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73 / 108 page  M22 M24 M26 M27 M23 M34 M28 M35 M29 M19 M20 D1 D2 D3 CLKMEM CEx† BEx ‡ EMIF.A[13:0] D[15:0] SDA10 SDRAS SDCAS SDWE READ READ READ CA1 CA2 CA3 M21 † The chip enable that becomes active depends on the address being accessed. ‡ All BE[1:0] signals are driven low (active) during reads. Byte manipulation of the read data is performed inside the EMIF. These signals r emain active until the next access that is not an SDRAM read occurs. SM320VC5507-EP www.ti.com SPRS613 – SEPTEMBER 2009 Table 5-10. Synchronous DRAM Cycle Switching Characteristics (continued) CVDD = 1.2 V CVDD = 1.6 V CVDD = 1.35 V NO. UNIT MIN MAX MIN MAX M25 td (CLKMEMH–BEIV) Delay time, CLKMEM high to BEx invalid 1.2 7 1.2 5 ns M26 td (CLKMEMH–AV) Delay time, CLKMEM high to address valid 1.2 7 1.2 5 ns M27 td (CLKMEMH–AIV) Delay time, CLKMEM high to address invalid 1.2 7 1.2 5 ns M28 td (CLKMEMH–SDCASL) Delay time, CLKMEM high to SDCAS low 1.2 7 1.2 5 ns M29 td (CLKMEMH–SDCASH) Delay time, CLKMEM high to SDCAS high 1.2 7 1.2 5 ns M30 td (CLKMEMH–DV) Delay time, CLKMEM high to data valid 1.2 7 1.2 5 ns M31 td (CLKMEMH–DIV) Delay time, CLKMEM high to data invalid 1.2 7 1.2 5 ns M32 td (CLKMEMH–SDWEL) Delay time, CLKMEM high to SDWE low 1.2 7 1.2 5 ns M33 td (CLKMEMH–SDWEH) Delay time, CLKMEM high to SDWE high 1.2 7 1.2 5 ns M34 td (CLKMEMH–SDA10V) Delay time, CLKMEM high to SDA10 valid 1.2 7 1.2 5 ns M35 td (CLKMEMH–SDA10IV) Delay time, CLKMEM high to SDA10 invalid 1.2 7 1.2 5 ns M36 td (CLKMEMH–SDRASL) Delay time, CLKMEM high to SDRAS low 1.2 7 1.2 5 ns M37 td (CLKMEMH–SDRASH) Delay time, CLKMEM high to SDRAS high 1.2 7 1.2 5 ns M38 td (CLKMEMH–CKEL) Delay time, CLKMEM high to CKE low 1.2 7 1.2 5 ns M39 td (CLKMEMH–CKEH) Delay time, CLKMEM high to CKE high 1.2 7 1.2 5 ns Figure 5-8. Three SDRAM Read Commands Copyright © 2009, Texas Instruments Incorporated Electrical Specifications 73 Submit Documentation Feedback Product Folder Link(s): SM320VC5507-EP |
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