ICS1893 datasheet(118/152 Pages) ICST

118 / 152 page

ICS1893 Rev C 6/6/00

June, 2000

118

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1893 Data Sheet - Release

RXD0,

RXD1,

RXD2,

RXD3

SRD0,

SRD1,

SRD2,

SRD3

35,

34,

33,

Output

Symbol Receive Data 0–3.

In 100M Symbol mode:

• The ICS1893’s SRD0 pin transmits the least-significant bit

and the SRD4 pin transmits the most-significant bit of the

symbol received from its MAC/Repeater interface.

• The ICS1893 continually transfers the data it receives from

its MDI to its SRD[4:0] pins (that is, to its MAC/Repeater

Interface). In the 100M Symbol mode, data is not framed.

Therefore, the ICS1893 does not assert its RXDV signal.

• The ICS1893 transfers its receive data to the SRD[4:0] pins

synchronously on the rising edges of its SRCLK signal.

Note: The signal on the ICS1893’s SRD[3:0] pins are

conditioned by the RXTRI pin.

RXDV

–

Connect

Receive Data Valid.

For the 100M Symbol Interface, this pin is a no connect. For

more information, see Table 6-1.

RXER

SRD4

Output

Symbol Receive Data 4.

This pin’s description is the same as that given in Table 9-5.

RXTRI

Input

Receive (Interface), Tri-State.

This pin’s input is from a MAC. When this pin’s signal is logic:

• Low, the MAC indicates it is not in a tri-state condition.

• High, the MAC indicates it is in a tri-state condition. In this

case, the ICS1893 acts to ensure that only one PHY is active

at a time. (A PHY address of 00 also tri-states the MII

interface.)

TXCLK

STCLK

Output

Symbol Transmit Clock.

This pin’s description is the same as that given in Table 9-5.

TXD0–3

STD0,

STD1,

STD2,

STD3

45,

46,

47,

Input

Symbol Transmit Data 0–3.

In 100M Symbol mode:

• The ICS1893 STD0 pin receives the least-significant bit and

the STD4 pin receives the most-significant bit of the symbol

received from the MAC/Repeater interface.

• The signals on the ICS1893 STD[4:0] pins are continually

and synchronously sampled on the rising edges of its

STCLK. These signals are independent of the TXEN signal.

Note: In 100M Symbol mode, TXEN is not used because the

MAC/Repeater is responsible for sending both IDLE

symbols and data.

TXEN

–

Connect

Transmit Enable.

For the 100M Symbol Interface, this pin is a no connect. For

more information, see Table 6-1.

TXER

STD4

Input

Symbol Transmit Data 4.

This pin’s description is the same as that given in Table 9-5.

Table 9-6.

MAC/Repeater Interface Pins: 100M Symbol Interface (Continued)

MII Pin

Name

100M

Symbol

Name

No.

Type

Pin Description

ICS1893 Datasheet(PDF) 118 Page - Integrated Circuit Systems

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