MTD907 Просмотр технического описания (PDF) - Myson Century Inc

Номер в каталоге

Компоненты Описание

производитель

MTD907

Ethernet Encoder/decoder and 10BaseT Transceiver with Built-in Waveform Shaper

Myson Century Inc 

MYSON

TECHNOLOGY

MTD907

17 AUT

18 LEDR/

JABDIS

19 LEDT/

PWDN

20 LEDL/

LPSS

21 LEDC/

FDX

22 LBK

23 VSS1

33 VSS2

24 TRST

25 RCMPT

26 RXD

27 CRS

28 RXC

29 RJAB

30 PLR

31 TPB

32 TPA

35 TNA

36 TNB

37 DSQ

38 RDP

39 RDN

40 PAU

41 DIP

42 DIN

43 DOP

44 DON

I Automatic Port Active high input. When active, MTD907 defaults to the

Selection

AUI port if the TP link test fails. If driven low, the port

selection is determined by the PAU pin.

O Receive LED, Active low output driver for receiving the LED indicator.

I Disable Jabber The LED 'on’time is extended by at least 80 ms.

When externally tied or driven low, disables the internal

jabber timer.

O Transmit LED, Active low output driver for LED transmission indicator.

I Power Down The LED 'on’time is extended by at least 80ms.

When externally tied or driven low, forces MTD907 into

power-down state.

O Link LED,

Active low output driver for link integrity LED indicator.

I Link Pass

When externally tied or driven low, forces MTD907 into

'link pass' state.

O Collision LED, Active low output driver for collision indicator LED. The

I Full Duplex

LED on time is extended by at least 80 ms.

When externally tied low, enables MTD907 for full duplex

operation by disabling internal TP loopback and TP

collision detection functions.

I Loopback

Active high input; enables internal loopback mode.

- Negative

Power supply ground.

Power Supply

I Test Mode

Active high test mode reset signal. Only recognized in

Reset

test mode (TST pin high) and internally pulled low.

O Remote

Active high output; indicating TP transceiver at the

Compatible

remote end is compatible with remote signaling.

O Received Data Output signal; recovers received data. Should be

connected directly to controller.

O Carrier Sense Output signal; detects incoming network traffic. Should

be connected directly to controller.

O Received

Output signal; recovers received clock. Should be

Clock

connected directly to controller.

O Remote

Active high output signal; indicates when the remote end

Jabber

is in jabber state.

O Polarity

Active high output signal; indicates when the TP polarity

Reversal

is reversed.

O Twisted-pair Two differential driver pairs (A and B) for the TP cable.

O Transmission The outputs are pre-equalized, thus no external filters

O Pairs A & B

are required. The TPX pins and TNX pins must be

O

shorted together with a 24.9W 1% to match the 100W TP

impedance.

I Disable SQE Active high input. When driven high, selects MTD907 for

hub/switch/repeater operation by disabling signal quality

test (heartbeat).

I Receive Data Differential input pair for TP cable. The reception filter is

I Input Pair (TP) integrated on-chip. No external filter is required.

I Select

Recognized only if the AUT pin is low. PAU=1 selects

Port/AUI

AUI port, PAU=0 selects TP port. It is recommended

that you tie this pin to ground if driving AUT pin high.

I AUI Reception Differential input pair from the AUI transceiver DI circuit.

I Pair

O AUI

Differential output pair to the AUI transceiver DO circuit.

O Transmission

Pair

MTD907 Revision 4.5 01/23/1997

3/14

Share Link: