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LAN9500AI 数据表(PDF) 56 Page - SMSC Corporation |
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LAN9500AI 数据表(HTML) 56 Page - SMSC Corporation |
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56 / 66 page  USB 2.0 to 10/100 Ethernet Controller Datasheet Revision 1.1 (04-18-13) 56 SMSC LAN950x Family DATASHEET 8.5.3 Reset and Configuration Strap Timing Figure 8.3 illustrates the nRESET pin timing requirements and its relation to the configuration strap pins and output drive. Assertion of nRESET is not a requirement. However, if used, it must be asserted for the minimum period specified. Figure 8.3 nRESET Reset Pin Timing Table 8.16 nRESET Reset Pin Timing Values SYMBOL DESCRIPTION MIN TYP MAX UNITS trstia nRESET input assertion time 1 uS tcss Configuration strap pins setup to nRESET deassertion 200 nS tcsh Configuration strap pins hold after nRESET deassertion 10 nS todad Output drive after deassertion 30 nS tcss nRESET Configuration Strap Pins trstia tcsh Output Drive todad |
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