LAN8810 datasheet(10/83 Pages) MICROCHIP

10 / 83 page

LAN8810/LAN8810I

DS00001870B-page 10

 2009-2015 Microchip Technology Inc.

Note 2-3

Exposed pad on package bottom (Figure 2-1).

TABLE 2-6:

MISCELLANEOUS PINS

Num Pins

Name

Symbol

Buffer

Type

Description

Crystal Input

ICLK

External 25 MHz crystal input.

Note:

This pin can also be driven by a 25 MHz

single-ended clock oscillator. When this

method is used, XO should be left

unconnected. Refer to Section 5.6,

"Clock Circuit," on page 75 for additional

information.

Crystal

Output

OCLK

External 25 MHz crystal output.

System Reset

nRESET

VIS

(PU)

This active-low pin allows external hardware to

reset the device.

Interrupt

Request

IRQ

VO8

Programmable interrupt request.

Note:

When used, this pin requires an

external 4.7K pull-up resistor.

Hardware

Power Down

HPD

VIS

(PD)

When asserted, this pin places the device into

Hardware Power Down (HPD) mode. Refer to

Section 3.7.3, "Hardware Power-Down," on

page 23 for additional information.

No Connect

This pin must be left floating for normal device

operation.

TABLE 2-7:

POWER PINS

Num Pins

Name

Symbol

Buffer

Type

Description

+3.3V/+2.5V

I/O Power

Supply Input

VDDVARIO

+2.5V/+3.3V variable I/O power.

Refer to Section 3.10, "Application Diagrams," on

page 31 and the LAN8810/LAN8810i reference

schematics for connection information.

Digital Core

+1.2V Power

Supply Input

VDD12CORE

Refer to Section 3.10, "Application Diagrams," on

page 31 and the LAN8810/LAN8810i reference

schematics for connection information.

Ethernet

+1.2V Port

Power Supply

Input For

Channels 0-3

VDD12A

Refer to Section 3.10, "Application Diagrams," on

page 31 and the LAN8810/LAN8810i reference

schematics for connection information.

Ethernet

+1.2V Bias

Power Supply

Input

VDD12BIAS

Refer to Section 3.10, "Application Diagrams," on

page 31 and the LAN8810/LAN8810i reference

schematics for connection information.

Ethernet PLL

+1.2V Power

Supply Input

VDD12PLL

Refer to Section 3.10, "Application Diagrams," on

page 31 and the LAN8810/LAN8810i reference

schematics for connection information.

Note 2-3

Ground

VSS

Common Ground

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