LAN9215-MZP datasheet(19/144 Pages) SMSC

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16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX Support

Datasheet

SMSC LAN9215

Revision 2.9 (03-01-12)

DATASHEET

Table 2.5 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 LAN9215. This signal is

pulled high with a weak internal pull-up resistor.

If nRESET is left unconnected, the LAN9215

will rely on its internal power-on reset circuitry.

Note:

The LAN9215 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 3.10, "Detailed Reset

Description," on page 44 for additional

information

Wakeup Indicator

PME

O8/OD8

When programmed to do so, is asserted when

the LAN9215 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 LAN9215.

The LAN9215will only wake up when it

detects a host write cycle (assertion of

nCS and nWR). Although any write to

the LAN9215, 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

(PD)

Enables Auto-MDIX. Pull high enable Auto-

MDIX, pull low or leave unconnected to disable

Auto-MDIX.

10/100 Selector

SPEED_SEL

(PU)

This signal functions as a configuration input on

power-up and is used to select the default

Ethernet settings. Upon deassertion of reset,

the value of the input is latched. This signal

functions as shown in Table 2.2, "Default

Ethernet Settings", below.

No Connect

No Connect. These pins must be left open.

LAN9215-MZP Datasheet(PDF) 19 Page - SMSC Corporation

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