LAN9117 datasheet(21/131 Pages) SMSC

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High Performance Single-Chip 10/100 Non-PCI Ethernet Controller

Datasheet

SMSC LAN9117

Revision 1.1 (05-17-05)

DATASHEET

Note 2.2

The external SMI port is selected when SMI_SEL = 1. When SMI_SEL = 0, MDIO is tri-

stated and MDC is driven low.

2.1

Buffer Types

Management Data

Clock

MDC

O8 (PD)

Management Data Clock: When

SMI_SEL = 1, this pin is the MII

management data clock. When

SMI_SEL=0, this pin is driven low.

See Note 2.2.

Note:

See Section 5.3.9,

"HW_CFG—Hardware

Configuration Register" for

more information on

SMI_SEL.

Table 2.7 Buffer Types

TYPE

DESCRIPTION

Input pin

Schmitt triggered Input

O12

Output with 12mA sink and 12mA source

OD12

Open-drain output with 12mA sink

IO8

I/O with 8mA symmetrical drive

OD8

Open-drain output with 8mA sink

Output 8mA symmetrical drive

30uA internal pull-up

30uA internal pull-down

Analog input

Analog output

AIO

Analog bi-directional

ICLK

Crystal oscillator input pin

OCLK

Crystal oscillator output pin

Table 2.6 MII Interface Signals (continued)

NO.

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

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