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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD6620S/PCB датащи(PDF) 9 Page - Analog Devices |
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AD6620S/PCB датащи(HTML) 9 Page - Analog Devices |
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9 / 44 page  AD6620 –9– REV. A MICROPORT MODE0, READ Timing is synchronous to CLK; MODE = 0. tDD DATA VALID tHC tSC tHC tZD tHA tRDY tRDY ADDRESS VALID tSAM tZR N N+1 N+2 N+3 N+4 N CLK1 WR2 RD2 CS3 D[7:0] RDY1 A[2:0] NOTES: 1 RDY IS DRIVEN LOW ASYNCHRONOUSLY BY RD AND CS GOING LOW AND RETURNS HIGH ON THE RISING EDGE OF CLK "N+3" FOR INTERNAL ACCESS (A[2:0] = 000), CLK "N+2" OTHERWISE. 2 THE SIGNAL, WR, MAY REMAIN HIGH AND RD MAY REMAIN LOW TO CONTINUE READ MODE. 3 CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+4 SHOWN) TO COMPLETE READ. Figure 17. MODE0 Read Timing Requirements and Switching Characteristics MICROPORT MODE0, WRITE Timing is synchronous to CLK; MODE = 0. DATA VALID tHC tSC tHC tSC tHM ADDRESS VALID N N+1 N+2 N+3 N* CLK1 WR2 RD2 CS3 D[7:0] RDY A[2:0] NOTES: 1 RDY IS DRIVEN LOW ASYNCHRONOUSLY BY WR AND CS GOING LOW AND RETURNS HIGH ON THE RISING EDGE OF CLK "N+2". 2 THESE SIGNALS (R/W AND DS) MAY REMAIN IN LOW STATE TO CONTINUE WRITING DATA. 3 CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+3 SHOWN) TO COMPLETE WRITE. * THE NEXT WRITE MAY BE INITIATED ON CLK, N*. tHA tRDY tRDY tSAM tSAM Figure 18. MODE0 Write Timing Requirements and Switching Characteristics |
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