USB5744

DS00001855D-page 36

 2015-2016 Microchip Technology Inc.

9.6.3

RESET AND CONFIGURATION STRAP TIMING

Figure 9-4 illustrates the RESET_N pin timing requirements and its relation to the configuration strap pins. Assertion of

RESET_N is not a requirement. However, if used, it must be asserted for the minimum period specified. Refer to Section

8.2, "Resets" for additional information on resets. Refer to Section 3.4, "Configuration Straps and Programmable Func-

tions" for additional information on configuration straps.

9.6.4

USB TIMING

All device USB signals conform to the voltage, power, and timing characteristics/specifications as set forth in the Uni-

versal Serial Bus Specification

. Please refer to the Universal Serial Bus Revision 3.1 Specification, available at http://

www.usb.org/developers/docs.

9.6.5

uments/user_manual/UM10204.pdf.

9.6.6

SMBUS TIMING

All device SMBus signals conform to the voltage, power, and timing characteristics/specifications as set forth in the Sys-

tem Management Bus Specification.

Please refer to the System Management Bus Specification, Version 1.0, available

at http://smbus.org/specs.

FIGURE 9-4:

RESET_N CONFIGURATION STRAP TIMING

TABLE 9-7:

RESET_N CONFIGURATION STRAP TIMING

Symbol

Description

Min

Typ

Max

Units

RESET_N input assertion time

5

s

Configuration strap pins hold after RESET_N deassertion

1

ms

Note:

The clock input must be stable prior to RESET_N deassertion.

Configuration strap latching and output drive timings shown assume that the Power-On reset has finished

first otherwise the timings in Section 9.6.2, "Power-On and Configuration Strap Timing" apply.

RESET_N

Configuration

Straps