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LAN8720A-CP

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

SMSC -> Microchip 

NUM PINS

1

1

NAME

Ethernet

TX/RX

Positive

Channel 2

Ethernet

TX/RX

Negative

Channel 2

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

Datasheet

Table 2.4 Ethernet Pins (continued)

SYMBOL

RXP

BUFFER

TYPE

DESCRIPTION

AIO

Transmit/Receive Positive Channel 2

RXN

AIO

Transmit/Receive Negative Channel 2

NUM PINS

1

NAME

External

Crystal

Input

External

Clock Input

External

1

Crystal

Output

1

External

Reset

Interrupt

Output

1

Reference

Clock Output

Table 2.5 Miscellaneous Pins

SYMBOL

XTAL1

BUFFER

TYPE

DESCRIPTION

ICLK External crystal input

CLKIN

XTAL2

ICLK

OCLK

Single-ended clock oscillator input.

Note:

When using a single ended clock

oscillator, XTAL2 should be left

unconnected.

External crystal output

nRST

nINT

REFCLKO

VIS

(PU)

VOD8

(PU)

VO8

System reset. This signal is active low.

Active low interrupt output. Place an external

resistor pull-up to VDDIO.

Note:

Refer to Section 3.6, "Interrupt

Management," on page 29 for additional

details on device interrupts.

Note:

Refer to Section 3.8.1.2, "nINTSEL and

LED2 Polarity Selection," on page 37 for

details on how the nINTSEL

configuration strap is used to determine

the function of this pin.

This optional 50MHz clock output is derived from

the 25MHz crystal oscillator. REFCLKO is

selectable via the nINTSEL configuration strap.

Note: Refer Section 3.7.4.2, "REF_CLK Out

Mode," on page 34 for additional details.

Note:

Refer to Section 3.8.1.2, "nINTSEL and

LED2 Polarity Selection," on page 37 for

details on how the nINTSEL

configuration strap is used to determine

the function of this pin.

SMSC LAN8720A/LAN8720Ai

13

DATASHEET

Revision 1.4 (08-23-12)

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