USB4624 datasheet(50/58 Pages) MICROCHIP

50 / 58 page

USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

Datasheet

DS00001717A-page 50

 2014 Microchip Technology Inc.

Note 9.10 XTAL2 can optionally be driven from a 24 MHz single-ended clock oscillator (REFCLK).

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 45.

Note: For RESET_N configuration strap timing requirements, refer to Section 9.5.2, "Reset and

Configuration Strap Timing," on page 51.

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

1ms

All External

Power Supplies

Vopp

Configuration

Straps

tcsh

USB4624 数据表(PDF) 50 Page - Microchip Technology