USB4624 Datasheet, PDF (50/58 Pages) SMSC Corporation – USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
9.5
9.5.1
Note 9.10 XTAL2 can optionally be driven from a 24 MHz single-ended clock oscillator (REFCLK).
AC Specifications
This section details the various AC timing specifications of the device.
Power-On Configuration Strap Valid Timing
Figure 9.1 illustrates the configuration strap timing requirements, in relation to power-on, for
applications where RESET_N is not used at power-on. The operational levels (V_opp) for the external
power supplies are detailed in Section 9.2, "Operating Conditions**," on page 45.
Note: For RESET_N configuration strap timing requirements, refer to Section 9.5.2, "Reset and
Configuration Strap Timing," on page 51.
All External
Power Supplies
Configuration
Straps
V_opp
t_csh
Figure 9.1 Power-On Configuration Strap Valid Timing
SYMBOL
t_csh
Table 9.8 Power-On Configuration Strap Valid Timing
DESCRIPTION
MIN
TYP
Configuration strap hold after external power supplies at
1
operational levels
MAX
UNITS
ms
DS00001717A-page 50
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