SMSC USB20H04 Manuel d'utilisateur télécharger pdf (Page 26)

4-Port USB 2.0 Hub Controller

Datasheet

Revision 1.63 (03-30-07) Page 26 SMSC USB20H04

DATASHEET

8.4.1.2 EEPROM Configuration Timing

Figure 8.4 - Timing to Complete Configuration from EEPROM

Table 8.8 - Time Values to Configure From EEPROM

NAME DESCRIPTION MIN TYP MAX UNITS

T1 RESET_N asserted 100 nsec

T2 (I

C) USB20H04 recovery/stabilization – until

first rising edge of SCK/SCL

24 30

μsec

T3 (I

C) EEPROM configuration to final

SCK/SCL activity

8 10 msec

T4 Configuration finished to Hub enabled 35 70 nsec

RESET_N

t2 t3

GND

Hardware

Reset Asserted

CS/EE_SEL

& SMB_SEL_N

strapping

options read

First Clock

Rising Edge

Config uration

Finished

SCK/SCL

Hub Function

Enable

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SMSC USB20H04 Manuel d'utilisateur Page 26