USB2532 Datasheet, PDF (55/60 Pages) SMSC Corporation – USB 2.0 Hi-Speed 2-Port Hub Controller

USB 2.0 Hi-Speed 2-Port Hub Controller
Datasheet
9.5
9.5.1
AC Specifications
This section details the various AC timing specifications of the device.
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 (V_opp) 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
Configuration
Straps
V_opp
t_csh
Figure 9.2 Power-On Configuration Strap Valid Timing
SYMBOL
t_csh
Table 9.4 Power-On Configuration Strap Valid Timing
DESCRIPTION
MIN
TYP
Configuration strap hold after external power supply at
1
operational level
MAX
UNITS
ms
SMSC USB2532
55
DATASHEET
Revision 1.0 (06-17-13)