USB 2.0 HSIC Hi-Speed 4-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 9.1 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 (Vopp) for the external
power supplies are detailed in Section 9.2, "Operating Conditions**," on page 59.
Note: For RESET_N configuration strap timing requirements, refer to Section 9.5.2, "Reset and
Configuration Strap Timing," on page 64.
All External
Power Supplies
Vopp
tcsh
Configuration
Straps
Figure 9.1 Power-On Configuration Strap Valid Timing
Table 9.8 Power-On Configuration Strap Valid Timing
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
tcsh
Configuration strap hold after external power supplies at
operational levels
1
ms
9.5.2
Reset and Configuration Strap Timing
Figure 9.2 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.
Revision 1.0 (06-17-13)
64
SMSC USB4604
DATASHEET
SMSC [ SMSC CORPORATION ]
