KSZ9567R_V01 datasheet(218/233 Pages) MICROCHIP

部件名	KSZ9567R

功能描述	7-Port Gigabit Ethernet Switch with Audio Video Bridging and Two RGMII/MII/RMII Interfaces

PDF	233 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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218 / 233 page

KSZ9567R

DS00002329E-page 218

 2022 Microchip Technology Inc. and its subsidiaries

7.0

DESIGN GUIDELINES

This section provides general design guidelines for the following:

• Reset Circuit Guidelines

• Magnetics Connection and Selection Guidelines

7.1

Reset Circuit Guidelines

Figure 7-1 illustrates the recommended reset circuit for powering up the KSZ9567R if reset is triggered by the power

supply.

Figure 7-2 illustrates a reset circuit recommended for applications where reset is driven by another device, such as a

CPU. At power-on reset, R, C and D1 provide the necessary ramp rise time to reset the KSZ9567R. The RST_OUT_N

from the CPU provides a warm reset after power-up.

FIGURE 7-1:

SIMPLE RESET CIRCUIT

FIGURE 7-2:

RESET CIRCUIT FOR CPU RESET INTERFACE

Ethernet

Switch

VDDIO

D1: 1N4148

R 10K

C 10uF

RESET_N

Ethernet

Switch

CPU/FPGA

VDDIO

C 10uF

R 10K

RST_OUT_N

D1, D2: 1N4148

RESET_N

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