ML6691 datasheet(2/10 Pages) MICRO-LINEAR

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ML6691

PIN CONFIGURATION

ML6691

44-PIN PLCC (Q44)

TSM4

TSM3

TSM2

TSM1

TSM0

RSM4

RSM3

RSM2

RSM1

RSM0

TXER

TXD3

TXD2

TXD1

TXD0

CRS

COL

RXD3

RXD2

RXD1

RXD0

19 20

144

PIN#

NAME

FUNCTION

1,21

VCC

Positive 5 volt supply.

2,3,4,

AD[4:0]

Local PHY address. These 5 inputs set

43,44

the address to which the local physical

layer responds. When an address

match is detected, the CS output is

asserted.

TXCLK

Transmit clock output. Continuous

25MHz clock provides the timing

reference for the transfer of TXEN,

TXER, and TXD[3:0] from the MAC.

TXCLK is generated from the TXC

input.

TXEN

Transmit enable input. A logic high

enables the transmit section of the

ML6691. This signal indicates the

MAC is transmitting nibble-wide data.

TXEN is synchronous to TXCLK.

TXER

Transmit error input. When TXER is

high , while TXEN is asserted, the

ML6691 will insert an “H” symbol in

the data stream. TXER is synchronous

to TXCLK.

8-11

TXD[3:0] Transmit nibble data inputs. Nibble-

wide data from the MAC. For data

transmission TXEN must be asserted.

TXD[0] is the least significant bit.

TXD[3:0] is synchronous to TXCLK.

PIN DESCRIPTION

CRS

Carrier sense output. A logic high

indicates that either the transmit or

receive medium is non-idle. CRS is

deasserted when both transmit and

receive are idle.

COL

Collision detect output. A logic high

indicates a collision (simultaneous

transmit and receive in half duplex

mode).

14-17

RXD[3:0] Receive nibble data outputs. Nibble-

wide data for transmission to the MAC.

RXD[0] is the least significant bit.

RXD[3:0] is synchronous to RXCLK.

RXDV

Receive data valid output. A logic high

indicates the ML6691 is presenting

valid nibble-wide data. RXDV shall

remain asserted from the first

recovered nibble of the frame through

the final recovered nibble. RXDV will

be de-asserted prior to the first RXCLK

that follows the final nibble. RXDV is

synchronous to RXCLK.

RXER

Receive error output. Active high,

indicates that a coding error was

detected. RXER is synchronous to

RXCLK.

PIN#

NAME

FUNCTION

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