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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
2
C) USB20H04 recovery/stabilization – until
first rising edge of SCK/SCL
24 30
μsec
T3 (I
2
C) EEPROM configuration to final
SCK/SCL activity
8 10 msec
T4 Configuration finished to Hub enabled 35 70 nsec
RESET_N
t1
t2 t3
GND
Hardware
Reset Asserted
CS/EE_SEL
& SMB_SEL_N
strapping
options read
First Clock
Rising Edge
Configuration
Finished
SCK/SCL
t4
Hub Function
Enable