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LAN9117

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

SMSC -> Microchip 

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

Datasheet

Table 2.6 MII Interface Signals (continued)

PIN

NO.

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

31 Management Data

Clock

MDC

O8 (PD)

1

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.

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

TYPE

I

IS

O12

OD12

IO8

OD8

O8

PU

PD

AI

AO

AIO

ICLK

OCLK

Table 2.7 Buffer Types

Input pin

DESCRIPTION

Schmitt triggered Input

Output with 12mA sink and 12mA source

Open-drain output with 12mA sink

I/O with 8mA symmetrical drive

Open-drain output with 8mA sink

Output 8mA symmetrical drive

30uA internal pull-up

30uA internal pull-down

Analog input

Analog output

Analog bi-directional

Crystal oscillator input pin

Crystal oscillator output pin

SMSC LAN9117

21

DATASHEET

Revision 1.1 (05-17-05)

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