TC9205M datasheet(11/51 Pages) ETC1

部件名	TC9205M

功能描述	5-Port 10/100/1000 Smart Ethernet Switch

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TC9205M

Preliminary Data Sheet

Pin Listing (continued)

No.

Pin label

Type

Description

W18 TxEn3

O

GMII/MII transmit enable

Y14 GTxClk3

O

GMII transmit clock

D15 Vss 3.3

G

Digital ground for I/O

Y18 TxEr3

I/Opd Transmit Error

W14 TxClk3

I

MII transmit clock

W10 Crs3

Is

MII carrier sense indication

V10 Col3

Is

MII collision indication

Y15 RxEr3

Is

Receive Error

H17 Vdd 2.0

P

Digital +2.0V power supply for core

V14 RxClk3

I

MII receive clock

Y13 RxDv3

Is

GMII/MII data valid

V11

RxData3_0

Is

GMII receive data - least significant nibble.

MII receive data

W11 RxData3_1

Is

GMII receive data - least significant nibble.

MII receive data

Y11

RxData3_2

Is

GMII receive data - least significant nibble.

MII receive data

Y12 RxData3_3

Is

GMII receive data - least significant nibble.

MII receive data

W12 RxData3_4

Is

GMII receive data - most significant nibble

V12 RxData3_5

Is

GMII receive data - most significant nibble

V13 RxData3_6

Is

GMII receive data - most significant nibble

W13 RxData3_7

Is

GMII receive data - most significant nibble

TxData4_7

GMII transmit data - bit 7

N19

BcstThrot

I/Opd

Enables broadcast throttling.

'1' – Enable

'0' – Disable

BcstThrot is latched on reset.

TxData4_6

GMII transmit data - bit 6

N18

OBMTest

I/Opd

Sets the switch into a special test mode. This test mode require

crossover loopbacks cables to be placed on the pair ports: 1 & 2,2 &

3, 3 & 4, 4 & 5,5 & 6 while ports 0 and 7 will be accessible to the test

machine.

'1' – enabled

'0' – disabled

OBMTest is latched on reset.

TxData4_5

GMII transmit data - bit 5

P20

FcBcstMode

I/Opd

Changes the way flow control threshold is handled while in broadcast

situations.

'1' – only the flow control threshold on the broadcast queue is considered

'0' – flow control thresholds associated to each source port originating

the broadcast frames are considered

FCBcstMode is latched on reset.

Confidential.

11/51

July 30, 2003

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