ENC28J60-CSLASHSP datasheet(6/96 Pages) MICROCHIP

6 / 96 page

ENC28J60

DS39662B-page 4

Preliminary

FIGURE 1-2:

TYPICAL ENC28J60-BASED INTERFACE

TABLE 1-1:

PINOUT I/O DESCRIPTIONS

Pin Name

Pin Number

Type

Buffer

Type

Description

SPDIP,

SOIC, SSOP

QFN

VCAP

—

2.5V output from internal regulator. A low Equivalent Series Resistance

(ESR) capacitor, with a typical value of 10

μF and a minimum value of

μF to ground, must be placed on this pin.

VSS

—

Ground reference.

CLKOUT

—

Programmable clock output pin.(1)

INT

—

INT interrupt output pin.(2)

—

Reserved function; always leave unconnected.

—

Data out pin for SPI interface.(2)

Data in pin for SPI interface.(3)

SCK

Clock in pin for SPI interface.(3)

Chip select input pin for SPI interface.(3,4)

RESET

Active-low device Reset input.(3, 4)

VSSRX

—

Ground reference for PHY RX.

TPIN-

ANA

Differential signal input.

TPIN+

ANA

Differential signal input.

RBIAS

ANA

Bias current pin for PHY. Must be tied to ground via a resistor (refer to

Section 2.4 “Magnetics, Termination and Other External Components”

for details).

VDDTX

—

Positive supply for PHY TX.

TPOUT-

—

Differential signal output.

TPOUT+

—

Differential signal output.

VSSTX

—

Ground reference for PHY TX.

VDDRX

—

Positive 3.3V supply for PHY RX.

VDDPLL

—

Positive 3.3V supply for PHY PLL.

VSSPLL

—

Ground reference for PHY PLL.

VSSOSC

—

Ground reference for oscillator.

OSC1

ANA

Oscillator input.

OSC2

—

Oscillator output.

VDDOSC

—

Positive 3.3V supply for oscillator.

LEDB

—

LEDB driver pin.(5)

LEDA

—

LEDA driver pin.(5)

VDD

—

Positive 3.3V supply.

Legend:

I = Input, O = Output, P = Power, DIG = Digital input, ANA = Analog signal input, ST = Schmitt Trigger

Note

Pins have a maximum current capacity of 8 mA.

Pins have a maximum current capacity of 4 mA.

Pins are 5V tolerant.

Pins have an internal weak pull-up to VDD.

Pins have a maximum current capacity of 12 mA.

TRANSFORMER

MCU

TX/RX

Buffer

MAC

PHY

LEDA

LEDB

SCK

INT

SDO

SDI

SCK

INTX

ENC28J60

TPIN+/-

TPOUT+/-

ETHERNET

RJ45

I/O

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