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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ICS1893 датащи(PDF) 139 Page - Integrated Circuit Systems |
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ICS1893 датащи(HTML) 139 Page - Integrated Circuit Systems |
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139 / 152 page  Chapter 10 DC and AC Operating Conditions ICS1893 Rev C 6/6/00 June, 2000 139 ICS1893 - Release Copyright © 2000, Integrated Circuit Systems, Inc. All rights reserved. 10.5.13 100M MII: Carrier Assertion/De-Assertion (Half-Duplex Transmission) Table 10-20 lists the significant time periods for the 100M MII carrier assertion/de-assertion during half-duplex transmission. The time periods consist of timings of signals on the following pins: • TXEN • TXCLK • CRS Figure 10-14 shows the timing diagram for the time periods. Figure 10-14. 100M MII Carrier Assertion/De-Assertion Timing Diagram (Half-Duplex Transmission Only) Table 10-20. 100M MII Carrier Assertion/De-Assertion (Half-Duplex Transmission Only) Time Period Parameter Condi- tions Min. Typ. Max. Units t1 TXEN Sampled Asserted to CRS Assert 0 3 4 Bit times t2 TXEN De-Asserted to CRS De-Asserted 0 3 4 Bit times t2 t1 TXEN TXCLK CRS |
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