KSZ9031RNX Просмотр технического описания (PDF) - Microchip Technology

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KSZ9031RNX

Gigabit Ethernet Transceiver with RGMII Support

Microchip Technology 

KSZ9031RNX

The MII management bus option gives the MAC processor complete access to the KSZ9031RNX control and status

registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change.

3.12 LED Mode

The KSZ9031RNX provides two programmable LED output pins, LED2 and LED1, which are configurable to support

two LED modes. The LED mode is configured by the LED_MODE strap-in (Pin 41). It is latched at power-up/reset and

is defined as follows:

• Pull-Up: Single-LED Mode

• Pull-Down: Tri-Color Dual-LED Mode

Each LED output pin can directly drive an LED with a series resistor (typically 220Ω to 470Ω).

3.12.1 SINGLE-LED MODE

In single-LED mode, the LED2 pin indicates the link status while the LED1 pin indicates the activity status, as shown in

Table 3-9.

TABLE 3-9: SINGLE-LED MODE - PIN DEFINITION

LED Pin

Pin State

LED Definition

Link/Activity

LED2

LED1

H

L

H

Toggle

OFF

ON

OFF

Blinking

Link Off

Link On (any speed)

No Activity

Activity (RX, TX)

3.12.2 TRI-COLOR DUAL-LED MODE

In tri-color dual-LED mode, the link and activity status are indicated by the LED2 pin for 1000BASE-T; by the LED1 pin

for 100BASE-TX; and by both LED2 and LED1 pins, working in conjunction, for 10BASE-T. This is summarized in

Table 3-10.

TABLE 3-10: TRI-COLOR DUAL-LED MODE - PIN DEFINITION

LED Pin (State)

LED2

LED1

LED Pin (Definition)

LED2

LED1

Link/Activity

H

L

Toggle

H

H

L

Toggle

H

H

H

L

Toggle

L

Toggle

OFF

ON

Blinking

OFF

OFF

ON

Blinking

OFF

OFF

OFF

ON

Blinking

ON

Blinking

Link Off

1000 Link/No Activity

1000 Link/Activity (RX, TX)

100 Link/No Activity

100 Link/Activity (RX, TX)

10 Link/No Activity

10 Link/Activity (RX, TX)

DS00002117C-page 24

 2016 Microchip Technology Inc.

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