LAN9211 datasheet(17/147 Pages) SMSC

17 / 147 page

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

SMSC LAN9211

Revision 2.9 (03-01-12)

DATASHEET

Table 2.4 System and Power Signals

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

Crystal 1, Clock In

XTAL1/CLKIN

lCLK

External 25MHz Crystal Input. This pin can also

be connected to single-ended TTL oscillator

(CLKIN). If this method is implemented, XTAL2

should be left unconnected.

Crystal 2

XTAL2

OCLK

External 25MHz Crystal output.

Reset

nRESET

(PU)

Active-low reset input. Resets all logic and

registers within the LAN9211. This signal is

pulled high with a weak internal pull-up resistor.

Note:

The LAN9211 must be reset on power-

up via nRESET or following power-up

via a soft reset (SRST). The LAN9211

must always be read at least once

after reset, or upon return from a

power-saving state or write operations

will not function. See Section 3.11,

"Detailed Reset Description," on

page 46 for additional information

Wakeup Indicator

PME

O8/OD8

When programmed to do so, is asserted when

the LAN9211 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 LAN9211.

The LAN9211will only wake up when it

detects a host write cycle (assertion of

nCS and nWR). Although any write to

the LAN9211, 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.

Auto-MDIX Enable

AMDIX_EN

(PU)

Enables Auto-MDIX. Pull high or leave

unconnected to enable Auto-MDIX, pull low to

disable Auto-MDIX.

No Connect

No Connect. This pin must be left open.

LAN9211 数据表(PDF) 17 Page - SMSC Corporation

LAN9211 数据表(HTML) 17 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载