SMSC USB20H04 Manuale Utente Scaricare il pdf (Pagina 25)

4-Port USB 2.0 Controller

Datasheet

SMSC USB20H04 Page 25 Revision 1.63 (03-30-07)

DATASHEET

8.4.1.1 SMBus Configuration Timing

Figure 8.3 - Timing for Configuration from SMBus

Table 8.7 - Time Values to Configure from SMBus

NAME DESCRIPTION MIN TYP MAX UNITS

T1 RESET_N asserted 100 nsec

T2 USB20H04 recovery/stabilization – until first

external SCK/SCL activity

16 32 nsec

T3 Implementation dependent load time

T4 Configuration finished to Hub enabled 35 70 nsec

RESET_N

t1 t2

GND

Hardware

Reset Asserted

CS/EE_SEL

& SMB_SEL_N

strapping

options read

First External

SCK/SCL

Activity

Config uration

Finished

SCK/SCL

Hub Function

Enable

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SMSC USB20H04 Manuale Utente Pagina 25