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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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COM20020D датащи(PDF) 63 Page - SMSC Corporation |
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COM20020D датащи(HTML) 63 Page - SMSC Corporation |
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63 / 72 page  63 FIGURE 20 – BACKPLANE MODE TRANSMIT OR RECEIVE TIMING (These signals are to and from the differential driver or the cable) nPULSE1 t2 t3 RXIN t10 t11 nPULSE2 t5 t6 (Internal Clk) t4 Parameter min typ max units t2 t3 t4 t5 t6 t7 t8 t10 t11 t12 nPULSE1 Pulse Width nPULSE1 Period nPULSE2 Low to nPULSE1 Low nPULSE2 High Time nPULSE2 Low Time nPULSE2 Period nPULSE2 High to nTXEN High RXIN Active Pulse Width RXIN Period nS nS nS nS nS nS nS nS nS 200* 400* 100* 100* 200* 200* 400* 50 50 -25 10 t1 t7 nTXEN t9 t8 LAST BIT (400 nS BIT TIME) t1 nPULSE2 High to nTXEN Low -25 50 nS (First Rising Edge on nPULSE2 after Last Bit Time) t9 nTXEN Low to first nPULSE1 Low** 650 750 nS t13 t12 -25 RXIN Inactive Pulse Width 20 nS t13 Beginning Last Bit Time to nTXEN High** 450 nS Above values are for 2.5 Mbps. Other Data Rates are shown below. 550 TDR is the Data Rate Period *t5, t6 = TDR/4 *t2, t7, t10 = TDR/2 *t3, t11 = TDR **t9 = x TDR +/- 50 nS 7 4 **t13 = x TDR +/- 50 nS 5 4 |
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