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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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USB2513I 데이터시트(PDF) 46 Page - Microchip Technology |
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USB2513I 데이터시트(HTML) 46 Page - Microchip Technology |
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46 / 63 page  USB 2.0 Hi-Speed Hub Controller Datasheet Revision 2.2 (02-17-12) 46 SMSC USB251xB/xBi DATASHEET 5.5.1.2 RESET_N for EEPROM Configuration Figure 5.4 Reset_N Timing for EEPROM Mode Notes: When in bus-powered mode, the hub and its associated circuitry must not consume more than 100 mA from the upstream USB power source during t6+t7+t8+t9. All power supplies must have reached the operating levels mandated in Chapter 6: DC Parameters, prior to (or coincident with) the assertion of RESET_N. NAME DESCRIPTION MIN TYP MAX UNITS t1 RESET_N asserted 1 μs t2 CFG_SEL[1:0] setup time 16.7 ns t3 CFG_SEL[1:0] hold time 16.7 1400 ns t4 Hub recovery/stabilization 500 μs t5 EEPROM read (hub configuration) 2.0 99.5 ms t6 USB attach (see notes) 100 ms t7 Host acknowledges attach and signals USB reset 100 ms t8 USB idle undefined ms t9 Completion time for requests (with or without data stage) 5ms t1 t5 t7 t8 t9 RESET_N VSS Hardware reset asserted Read I2C EEPROM Attach USB upstream USB reset recovery Idle Start completion request response Read CFG_SEL[1:0] t2 t3 t6 valid CFG_SEL[2:0] VSS don’t care don’t care t4 |
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