KSZ9563RNXI datasheet(16/226 Pages) MICROCHIP

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KSZ9563R

DS00002419D-page 16

 2017-2018 Microchip Technology Inc.

3.2.1

CONFIGURATION STRAPS

The KSZ9563R utilizes configuration strap pins to configure the device for different modes. These strap pins are con-

figured by using external pull-up/down resistors to create a high or low state on the pins which are sampled at the end

of a device power-up or software reset cycle. They are also latched when powering-up from a hardware or software

power-down or hardware reset state (rising edge of RESET_N). The configuration strap pins and their associated func-

tions are detailed in Table 3-3.

+1.2V

Digital Power

DVDDL

+1.2V Digital Power

Ground

GND

Ground (pins and pad)

TABLE 3-3:

CONFIGURATION STRAP DESCRIPTIONS

Configuration

Strap Pin

Description

LED1_0

Switch Enable at Startup

0: Start Switch is disabled. The switch will not forward packets until the Start Switch bit is set

in the Switch Operation Register.

1: Start Switch is enabled. The switch will forward packets immediately after reset. (Default)

LED1_1

In-Band Management (IBA)

0: Enable In-Band Management

1: Disable In-Band Management (Default)

LED2_0

Port 3 (MAC) MII/RMII Mode

0: MII: PHY Mode

RMII: Clock Mode. RMII 50MHz reference clock is output on REFCLKO.

RGMII: IBS is disabled

1: MII: MAC Mode (Default)

RMII: Normal Mode. RMII 50MHz reference clock is input on REFCLKI.

RGMII: IBS is enabled

LED2_1

Port 3 (MAC) Speed Select

0: 1000Mbps Mode

1: 100Mbps Mode (Default)

RXD3, RXD2

[RXD3, RXD2]: Port 3 (MAC) xMII Mode

00: MII (Default)

01: RMII

10: RESERVED

11: RGMII

RXD1, RXD0

[RXD1, RXD0]: Serial Interface Mode

00: MIIM (Default)

01: I2C

1x: SPI

RX_ER, PME_N

[RX_ER, PME_N]: Ports 1 and 2 (PHY) Configuration

00: RESERVED

01: Auto-negotiation enable with EEE (Default)

10: Auto-negotiation disabled (Force 100Mbps, full-duplex mode), and Auto-MDIX disable

(set to MDI-X mode)

11: Auto-negotiation disabled (Force 100Mbps, full-duplex mode), and Auto-MDIX disable (set

to MDI mode)

TABLE 3-2:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

KSZ9563RNXI 数据表(PDF) 16 Page - Microchip Technology

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