LAN9116 Просмотр технического описания (PDF) - SMSC -> Microchip

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LAN9116

Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

SMSC -> Microchip 

Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

Datasheet

Table 2.4 Serial EEPROM Interface Signals (continued)

PIN

NO.

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

69

EEPROM Clock, EECLK/GPO4/

O8

GPO4 RX_DV, RX_DV/RX_CLK

RX_CLK

1

EEPROM Clock: Serial EEPROM

Clock pin.

General Purpose Output 4: This

pin can also function as a general-

purpose output, or it can be

configured to monitor the RX_DV or

RX_CLK signals on the internal MII

port. When configured as a GPO

signal, or as an RX_DV/RX_CLK

monitor, the EECS pin is deasserted

so as to never unintentionally access

the serial EEPROM. This signal

cannot function as a general-

purpose input.

PIN

NO.

NAME

6

Crystal 1

5

Crystal 2

95

Reset

Table 2.5 System and Power Signals

SYMBOL

XTAL1

XTAL2

nRESET

BUFFER NUM

TYPE

PINS

lclk

1

Oclk

1

IS

1

(PU)

DESCRIPTION

External 25MHz Crystal Input.

Can also be connected to single-

ended TTL oscillator. If this method is

implemented, XTAL2 should be left

unconnected.

External 25MHz Crystal output.

Active-low reset input. Resets all

logic and registers within the

LAN9116 This signal is pulled high

with a weak internal pull-up

resistor. If nRESET is left

unconnected, the LAN9116 will

rely on its internal power-on reset

circuitry

Note:

The LAN9116 must always

be read at least once after

power-up, reset, or upon

return from a power-saving

state or write operations will

not function. See Section

3.11, "Detailed Reset

Description," on page 40 for

additional information

SMSC LAN9116

17

DATASHEET

Revision 1.1 (05-17-05)

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