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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB2524 датащи(PDF) 49 Page - SMSC Corporation |
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USB2524 датащи(HTML) 49 Page - SMSC Corporation |
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49 / 57 page  USB MultiSwitchTM Hub Datasheet SMSC USB2524 49 Revision 1.91 (08-22-07) DATASHEET 9.1.1.2 RESET_N for EEPROM Configuration Figure 9.2 Reset_N Timing for EEPROM Mode Note 9.2 When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t4+t5+t6+t7. Table 9.2 Reset_N Timing for EEPROM Mode NAME DESCRIPTION MIN TYP MAX UNITS t1 RESET_N Asserted. 1 μsec t2 Hub Recovery/Stabilization. 500 μsec t3 EEPROM Read / Hub Config. 2.0 99.5 msec t4 USB Attach (See Note 9.2) 100 msec t5 Host acknowledges attach and signals USB Reset. 100 msec t6 USB Idle. undefined msec t7 Completion time for requests (with or without data stage). 5 msec t1 t2 t4 t5 t6 t7 RESET_N VSS Hardware reset asserted Read Strap Options Read EEPROM + Set Options Attach USB Upstream USB Reset recovery Idle Start completion request response t3 |
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