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ENC424J600

Stand-Alone 10/100 Ethernet Controller with SPI or Parallel Interface

Microchip Technology 

ENC424J600/624J600

TABLE 1-2: ENC424J600/624J600 PINOUT DESCRIPTIONS (CONTINUED)

Pin Name

Pin Number

Pin Type

44-Pin 64-Pin

Input

Buffer

Description

OSC1

3

3

I

ANA 25 MHz Crystal Oscillator/Clock Input

OSC2

2

2

O

—

25 MHz Crystal Oscillator Output

PSPCFG0

32

—

I

CMOS PSP Mode Select 0

PSPCFG1

—

45

I

CMOS PSP Mode Select 1

PSPCFG2

—

17

I

CMOS PSP Mode Select 2

PSPCFG3

—

18

I

CMOS PSP Mode Select 3

PSPCFG4

—

52

I

CMOS PSP Mode Select 4

RBIAS

11

16

I

ANA PHY Bias (external resistor) Connection

RD

36

51

I

CMOS PSP Read Strobe

RW

36

51

I

CMOS PSP Combined Read/Write Signal

SCK

37

52

I

CMOS SPI Serial Clock Input

SI

36

51

I

CMOS SPI Serial Data Input (from Master)

SO

35

50

O

—

SPI Serial Data Out (to Master)

SPISEL

24

34

I

CMOS SPI/PSP Interface Select

TPIN-

17

27

I

ANA Differential Ethernet Receive Minus Signal Input

TPIN+

16

26

I

ANA Differential Ethernet Receive Plus Signal Input

TPOUT-

21

31

O

—

Differential Ethernet Transmit Minus Signal Output

TPOUT+

20

30

O

—

Differential Ethernet Transmit Plus Signal Output

VCAP

43

63

P

—

Regulator External Capacitor connection

VDD

44

21, 47,

P

—

Positive 3.3V Power Supply for Digital Logic

64

VDDOSC

4

4

P

—

Positive 3.3V Power Supply for 25 MHz Oscillator

VDDPLL

12

22

P

—

Positive 3.3V Power Supply for PHY PLL Circuitry

VDDRX

15

25

P

—

Positive 3.3V Power Supply for PHY RX Circuitry

VDDTX

18

28

P

—

Positive 3.3V Power Supply for PHY TX Circuitry

VSS

33, 42 46, 62

P

—

Ground Reference for Digital Logic

VSSOSC

1

1

P

—

Ground Reference for 25 MHz Oscillator

VSSPLL

13

23

P

—

Ground Reference for PHY PLL Circuitry

VSSRX

14

24

P

—

Ground Reference for PHY RX Circuitry

VSSTX

19, 22 29, 32

P

—

Ground Reference for PHY TX Circuitry

WR

35

50

I

CMOS PSP Write Strobe

WRH

—

48

I

CMOS PSP Write High Strobe

WRL

—

50

I

CMOS PSP Write Low Strobe

Legend: I = Input; O = Output; P = Power; CMOS = CMOS compatible input buffer; ANA = Analog level input/output

DS39935B-page 8

© 2009 Microchip Technology Inc.

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