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

Table 2.5 System and Power Signals (continued)

Datasheet

PIN

NO.

70

NAME

SYMBOL

Wakeup Indicator

PME

100,99

,98

General Purpose

I/O data,

nLED1 (Speed

Indicator),

nLED2 (Link &

Activity Indicator),

nLED3 (Full-

Duplex

Indicator).

GPIO[2:0]/

LED[3:1]

BUFFER NUM

TYPE

PINS

O8/OD8

1

IS/O12/

3

OD12

DESCRIPTION

When programmed to do so, is

asserted when the LAN9116 detects

a wake event and is requesting the

system to wake up from the

associated sleep state. The polarity

and buffer type of this signal is

programmable.

Note:

Detection of a Power

Management Event, and

assertion of the PME signal

will not wakeup the

LAN9116. The LAN9116 will

only wake up when it

detects a host write cycle

(assertion of nCS and

nWR). Although any write to

the LAN9116, regardless of

the data written, will wake-

up the device when it is in a

power-saving mode, it is

required that the

BYTE_TEST register be

used for this purpose.

General Purpose I/O data: These

three general-purpose signals are

fully programmable as either push-

pull output, open-drain output or input

by writing the GPIO_CFG

configuration register in the CSR’s.

They are also multiplexed as GP LED

connections.

GPIO signals are Schmitt-triggered

inputs. When configured as LED

outputs these signals are open-drain.

nLED1 (Speed Indicator). This

signal is driven low when the

operating speed is 100Mbs, during

auto-negotiation and when the cable

is disconnected. This signal is driven

high only during 10Mbs operation.

nLED2 (Link & Activity Indicator).

This signal is driven low (LED on)

when the LAN9116 detects a valid

link. This signal is pulsed high (LED

off) for 80mS whenever transmit or

receive activity is detected. This

signal is then driven low again for a

minimum of 80mS, after which time it

will repeat the process if TX or RX

activity is detected. Effectively, LED2

is activated solid for a link. When

transmit or receive activity is sensed

LED2 will flash as an activity

indicator.

nLED3 (Full-Duplex Indicator). This

signal is driven low when the link is

operating in full-duplex mode.

Revision 1.1 (05-17-05)

18

DATASHEET

SMSC LAN9116

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