USB 2.0 Hi-Speed 2-Port Hub Controller
Datasheet
9.5
AC Specifications
This section details the various AC timing specifications of the device.
9.5.1
Power-On Configuration Strap Valid Timing
Figure 9.2 illustrates the configuration strap timing requirements, in relation to power-on, for
applications where RESET_N is not used at power-on. The operational level (Vopp) for the external
power supply is detailed in Section 9.2, "Operating Conditions**," on page 52.
Note: For RESET_N configuration strap timing requirements, refer to Section 9.5.2, "Reset and
Configuration Strap Timing," on page 56.
External Power
Supply
Vopp
tcsh
Configuration
Straps
Figure 9.2 Power-On Configuration Strap Valid Timing
Table 9.4 Power-On Configuration Strap Valid Timing
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
tcsh
Configuration strap hold after external power supply at
operational level
1
ms
SMSC USB2532
55
Revision 1.0 (06-17-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
