Figure 9.2 reset_n timing for eeprom mode, Table 9.2 reset_n timing for eeprom mode, Reset_n for eeprom configuration – SMSC USB2524 User Manual
Page 49: Datasheet
USB MultiSwitch
TM
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
)
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