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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VG4616321B датащи(PDF) 9 Page - Vanguard International Semiconductor |
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VG4616321B датащи(HTML) 9 Page - Vanguard International Semiconductor |
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9 / 82 page  Document:1G5-0145 Rev.1 Page 9 VIS VG4616321B/VG4616322B 262,144x32x2-Bit Preliminary CMOS Synchronous Graphic RAM T0 T1 T2 T3 T4 T5 T6 T7 T8 T0 T1 T2 T3 T4 T5 T6 T7 T8 T0 T1 T2 T3 T4 T5 T6 T7 T8 CLK COMMAND NOP READ A NOP NOP NOP NOP WRITE B NOP NOP Read to Write interval (Burst Length °Ÿ 4, CAS Latency = 3) DQM DOUT A0 DQ’s DINB0 DINB1 DINB2 : “H” or “L” Must be Hi-Z before the Write Command CLK COMMAND NOP NOP BANK A NOP READ A WRITE A NOP NOP NOP Read to Write interval (Burst Length °Ÿ 4, CAS Latency = 1, 2) DQM DIN A0 DIN A1 DIN A2 DIN A3 : “H” or “L” Must be Hi-Z before the Write Command DIN A0 DIN A1 DIN A2 DIN A3 CAS Iatency = 1 tCK1,DQ’s CAS Iatency = 2 tCK2,DQ’s ACTIVATE CLK COMMAND NOP NOP NOP WRITE B NOP NOP NOP Read to Write interval (Burst Length °Ÿ 4, CAS Latency = 1, 2) DQM DIN B0 DIN B1 DINB2 DIN B3 : “H” or “L” Must be Hi-Z before the Write Command DIN B0 DIN B1 DIN B2 DIN B3 CAS Iatency = 1 tCK1,DQ’s CAS Iatency = 2 tCK2,DQ’s READ A DOUT A0 NOP A read burst without auto precharge function may be interrupted by a BankPrecharge/ PrechargeAll command to the same bank. The following figure shows the optimum time that BankPrecharge/PrechargeAll command is issued in different CAS latency. 1 Clk Interval |
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