USB2504 SMSC Corporation, USB2504 Datasheet - Page 36

• Manufacturer Part Number: USB2504
• Description: Integrated USB 2.0 Compatible 4-Port Hub
• Manufacturer: SMSC Corporation

Revision 2.1 (12-06-06)
5.6.1.2
NAME
RESET_N
t1
t2
t3
t4
t5
t6
t7
VSS
Hardware
asserted
reset
RESET_N Asserted.
Hub Recovery/Stabilization.
EEPROM Read / Hub Config.
USB Attach (See Note).
Host acknowledges attach and signals USB
Reset.
USB Idle.
Completion time for requests (with or without data
stage).
RESET_N for EEPROM Configuration
Notes:
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.
All Power Supplies must have reached the operating levels mandated in
Parameters", prior to (or coincident with) the assertion of RESET_N.
Read Strap
t1
Options
DESCRIPTION
Figure 5.3 Reset_N Timing for EEPROM Mode
Table 5.6 Reset_N Timing for EEPROM Mode
Read EEPROM
Set Options
t2
+
DATASHEET
t4
t3
36
Upstream
Attach
USB
MIN
100
1
USB Reset
recovery
t5
undefined
Integrated USB 2.0 Compatible 4-Port Hub
TYP
2.0
t6
Idle
SMSC USB2504/USB2504A
Section Chapter 8, "DC
MAX
99.5
500
100
5
t7
completion
response
request
Start
UNITS
Datasheet
msec
msec
msec
msec
msec
μsec
μsec