KSZ9031RNX View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

KSZ9031RNX

Gigabit Ethernet Transceiver with RGMII Support

Microchip Technology 

FIGURE 7-4:

MDC/MDIO TIMING

KSZ9031RNX

TABLE 7-3: MDC/MDIO TIMING PARAMETERS

Timing

Parameter

Description

Min. Typ. Max. Units

tP

tMD1

tMD2

tMD3

MDC period

MDIO (PHY input) setup to rising edge of MDC

MDIO (PHY input) hold from rising edge of MDC

MDIO (PHY output) delay from rising edge of MDC

120 400

—

10

—

—

10

—

—

ns

0

—

—

The typical MDC clock frequency is 2.5 MHz (400 ns clock period).

The KSZ9031RNX can operate with MDC clock frequencies generated from bit banging with GPIO pin in the 10s/100s

of Hertz and have been tested up to a MDC clock frequency of 8.33 MHz (120 ns clock period). Test condition for

8.33 MHz is for one KSZ9031RNX PHY on the MDIO line with a 1.0 kΩ pull-up to the DVDDH supply rail.

 2016 Microchip Technology Inc.

DS00002117C-page 61

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