LAN9215 datasheet(21/144 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

Note 2.1

Please refer to the SMSC application note ”AN14.9 - “Migrating from LAN9115 to the

LAN9215” for additional details.

PLL Power

VDD_PLL

+1.8V Power from the internal PLL regulator.

This pin must be connected to a 10uF capacitor

(<2 Ohm ESR), in parallel with a 0.01uF

capacitor to ground. This pin must not be used

to supply power to other external devices. See

Note 2.1.

PLL Ground

VSS_PLL

GND for the PLL

(100-TQFP Package Only)

Reference Power

VDD_REF

Connected to 3.3v power and used as the

reference voltage for the internal PLL

Reference Ground

VSS_REF

Ground for internal PLL reference voltage

(100-TQFP Package Only)

Ground

GND

Common Ground

(100-LFBGA Package Only)

Table 2.6 MII Interface Signals

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

Transmit Clock:

TX_CLK

(PD)

Transmit Clock: 25MHz in 100Base-TX mode.

2.5MHz in 10Base-T mode.

Transmit Data [3:0]

TXD[3:0]

(PD)

Transmit Data 3-0: Data bits that are accepted

by the PHY for transmission.

When the internal PHY is selected, these

signals are driven low (0).

Transmit Enable

TX_EN

(PD)

Transmit Enable: Indicates that valid data is

presented on the TXD[3:0] signals, for

transmission.

When the internal PHY is selected, this signal

is driven low (0).

Receive Clock

RX_CLK

(PD)

Receive Clock: 25MHz in 100Base-TX mode.

2.5MHz in 10Base-T mode.

Receive Error

RX_ER

(PD)

Receive Error: Asserted by the PHY to indicate

that an error was detected somewhere in the

frame presently being transferred from the PHY.

Collision Detect:

COL

(PD)

MII Collision Detect: Asserted by the PHY to

indicate detection of collision condition.

Receive Data[3:0]

RXD[3:0]

Note 2.2

Receive Data 3-0: Data bits that are sent from

the PHY to the Ethernet MAC. See Note 2.2.

Carrier Sense

CRS

(PD)

Carrier Sense: Indicates detection of carrier.

Receive Data

Valid:

RX_DV

(PD)

Receive Data Valid: Indicates that recovered

and decoded data nibbles are being presented

by the PHY on RXD[3:0].

Table 2.5 System and Power Signals (continued)

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

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