LAN9250 datasheet(411/421 Pages) MICROCHIP

Part #	LAN9250

Description	Integrated Ethernet PHY with HP Auto-MDIX

PDF	421 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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411 / 421 page

 2015 Microchip Technology Inc.

DS00001913A-page 411

LAN9250

19.6.4

POWER-ON AND CONFIGURATION STRAP TIMING

This diagram illustrates the configuration strap valid timing requirements in relation to power-on. In order for valid con-

figuration strap values to be read at power-on, the following timing requirements must be met.

Note:

Configuration straps must only be pulled high or low. Configuration straps must not be driven as inputs.

Device configuration straps are also latched as a result of RST# assertion. Refer to Section 19.6.3, "Reset and Config-

uration Strap Timing" and Section 6.2.1, "Chip-Level Resets," on page 39 for additional details.

FIGURE 19-5:

POWER-ON CONFIGURATION STRAP LATCHING TIMING

TABLE 19-12: POWER-ON CONFIGURATION STRAP LATCHING TIMING VALUES

Symbol

Description

Min

Typ

Max

Units

tcfg

Configuration strap valid time

All External

Power Supplies

Configuration Straps

tcfg

Vopp

LAN9250 Datasheet(PDF) 411 Page - Microchip Technology