USB2534 Datasheet, PDF (58/62 Pages) SMSC Corporation – USB 2.0 Hi-Speed 4-Port Hub Controller

USB 2.0 Hi-Speed 4-Port Hub Controller
Datasheet
9.5.2
Reset and Configuration Strap Timing
Figure 9.3 illustrates the RESET_N timing requirements and its relation to the configuration strap
signals. Assertion of RESET_N is not a requirement. However, if used, it must be asserted for the
minimum period specified.
Refer to Section 8.3, "Resets," on page 49 for additional information on resets. Refer to Section 6.3,
"Device Configuration Straps," on page 30 for additional information on configuration straps.
RESET_N
Configuration
Straps
t_rstia
t_csh
Figure 9.3 RESET_N Configuration Strap Timing
Table 9.5 RESET_N Configuration Strap Timing
SYMBOL
t_rstia
t_csh
DESCRIPTION
RESET_N input assertion time
Configuration strap hold after RESET_N deassertion
MIN
TYP
5
1
MAX
UNITS
us
ms
9.5.3
9.5.4
9.5.5
USB Timing
All device USB signals conform to the voltage, power, and timing characteristics/specifications as set
forth in the Universal Serial Bus Specification. Please refer to the Universal Serial Bus Specification,
Revision 2.0, available at http://www.usb.org.
SMBus Timing
All device SMBus signals conform to the voltage, power, and timing characteristics/specifications as
set forth in the System Management Bus Specification. Please refer to the System Management Bus
Specification, Version 1.0, available at http://smbus.org/specs.
I²C Timing
All device I²C signals conform to the 100KHz Standard Mode (Sm) voltage, power, and timing
characteristics/specifications as set forth in the I²C-Bus Specification. Please refer to the I²C-Bus
Specification, available at http://www.nxp.com.
Revision 1.0 (06-17-13)
58
DATASHEET
SMSC USB2534