ICS1893 datasheet(119/152 Pages) ICST

119 / 152 page

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1893 Rev C 6/6/00

June, 2000

119

ICS1893 - Release

9.3.4.3

MAC/Repeater Interface Pins for 10M Serial Interface

Table 9-7 lists the MAC/Repeater Interface pin descriptions for the 10M Serial Interface.

Table 9-7.

MAC/Repeater Interface Pins: 10M Serial Interface

MII Pin

Name

100M

Symbol

Name

No.

Type

Pin Description

COL

10COL

Output

10M (Serial Interface) Collision (Detect).

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

CRS

10CRS

Output

10M (Serial Interface) Carrier Sense.

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

MDC

Input

Management Data Clock.

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

MDIO

Input/

Output

Management Data Input/Output.

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

RXCLK

10RCLK

Output

10M Receive Clock.

In 10M Serial mode, the ICS1893 sources the 10RCLK to its

MAC/repeater Interface. The 10RCLK synchronizes the data on

the 10RD0 pin between the ICS1893 and the MAC/repeater.

• The 10RCLK frequency is 10 MHz.

• The ICS1893 generates 10RCLK from the MDI data stream

using a digital PLL. When the MDI data stream terminates,

the PLL continues to operate, synchronously referenced to

the last packet received.

• The ICS1893 switches between clock sources during the

period between when 10CRS is being asserted and

10RXDV is being asserted. While the ICS1893 locks onto

the incoming data stream, a clock phase change of up to 360

degrees can occur.

• The 10RCLK aligns once per packet.

Note: The signal on the 10RCLK pin is conditioned by the

RXTRI pin.

RXD0

10RD

10M (Serial Interface) Receive Data 0.

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

RXD1,

RXD2,

RXD3

–

34,

33,

Connect

Receive Data 1–3.

For the 10M Serial Interface, these pins are a no connect. For

more information, see Table 6-2.

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