LAN7500I datasheet(49/58 Pages) MICROCHIP

Part #	LAN7500I

Description	Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller

PDF	58 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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49 / 58 page

Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller

Datasheet

 2014 Microchip Technology Inc.

DS00001734A-page 49

7.5.3

Power-On Reset Timing

Figure 7.3 illustrates the nRESET timing requirements in relation to power-on. A hardware reset

(nRESET assertion) is required following power-on. For proper operation, nRESET must be asserted

for no less than trstia. The nRESET pin can be asserted at any time, but must not be deasserted before

tpurstd after all external power supplies have reached operational levels.

Note: nRESET deassertion must be monotonic.

Figure 7.3 nRESET Power-On Timing

Table 7.16 nRESET Power-On Timing Values

SYMBOL

DESCRIPTION

MIN

TYP

MAX

UNITS

tpurstd

External power supplies at operational level to nRESET

deassertion

tpurstv

External power supplies at at operational level to

nRESET valid

0nS

trstia

nRESET input assertion time

100

S

LAN7500I Datasheet(PDF) 49 Page - Microchip Technology