ENC28J60_06 datasheet(6/96 Pages) MICROCHIP | Stand-Alone Ethernet Controller with SPI Interface

Part #	ENC28J60

Description	Stand-Alone Ethernet Controller with SPI Interface

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Manufacturer	MICROCHIP [Microchip Technology]

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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

1

25

P

—

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

1

μF to ground, must be placed on this pin.

VSS

2

26

P

—

Ground reference.

CLKOUT

3

27

O

—

Programmable clock output pin.(1)

INT

4

28

O

—

INT interrupt output pin.(2)

NC

5

1

O

—

Reserved function; always leave unconnected.

SO

6

2

O

—

Data out pin for SPI interface.(2)

SI

7

3

I

ST

Data in pin for SPI interface.(3)

SCK

8

4

I

ST

Clock in pin for SPI interface.(3)

CS

9

5

I

ST

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

RESET

10

6

I

ST

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

VSSRX

11

7

P

—

Ground reference for PHY RX.

TPIN-

12

8

I

ANA

Differential signal input.

TPIN+

13

9

I

ANA

Differential signal input.

RBIAS

14

10

I

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

15

11

P

—

Positive supply for PHY TX.

TPOUT-

16

12

O

—

Differential signal output.

TPOUT+

17

13

O

—

Differential signal output.

VSSTX

18

14

P

—

Ground reference for PHY TX.

VDDRX

19

15

P

—

Positive 3.3V supply for PHY RX.

VDDPLL

20

16

P

—

Positive 3.3V supply for PHY PLL.

VSSPLL

21

17

P

—

Ground reference for PHY PLL.

VSSOSC

22

18

P

—

Ground reference for oscillator.

OSC1

23

19

I

ANA

Oscillator input.

OSC2

24

20

O

—

Oscillator output.

VDDOSC

25

21

P

—

Positive 3.3V supply for oscillator.

LEDB

26

22

O

—

LEDB driver pin.(5)

LEDA

27

23

O

—

LEDA driver pin.(5)

VDD

28

24

P

—

Positive 3.3V supply.

Legend:

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

Note

1:

Pins have a maximum current capacity of 8 mA.

2:

Pins have a maximum current capacity of 4 mA.

3:

Pins are 5V tolerant.

4:

Pins have an internal weak pull-up to VDD.

5:

Pins have a maximum current capacity of 12 mA.

TRANSFORMER

MCU

TX/RX

Buffer

MAC

PHY

LEDA

LEDB

SI

SO

SCK

INT

SDO

SDI

SCK

INTX

ENC28J60

TPIN+/-

TPOUT+/-

ETHERNET

RJ45

I/O

CS

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