ICS1892 datasheet(107/148 Pages) ICST

107 / 148 page

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1892, Rev. D, 2/26/01

February 26, 2001

107

ICS1892

DPXSEL

Input or

Output

Half-Duplex / Full-Duplex Select.

The ‘Pin Type’ for this pin depends on the setting for the HW/SW pin

(pin 23). When the HW/SW pin is set for:

• Hardware mode, this pin acts as an input. In this case, when the

signal on this pin is logic:

– Low, this pin selects half-duplex operations.

– High, this pin selects full-duplex operations.

• Software mode, this pin acts as an output that indicates the current

status of this pin. In this case, when the signal on this pin is logic:

– Low, this pin indicates that it is set for half-duplex operations.

– High, this pin indicates that it is set for full-duplex operations.

HW/SW

Input

Hardware/Software (Select).

When the signal on this pin is logic:

• Low, this pin selects Hardware mode operations.

• High, this pin selects Software mode operations.

LOCK

Output

(Stream Cipher) Lock (Acquired).

When the signal on this pin is logic:

• Low, the ICS1892 does not have a lock on the data stream.

• High, the 1892 has a lock on the data stream.

LSTA

Output

Link Status.

This pin is used to report the status of the link segment. When the

signal on this pin is logic:

• Low, there is no link established.

• High, there is a link established.

This pin is mapped according to the interface for which the ICS1892 is

mapped. For the:

• Media Independent Interface (MII), the LSTA is mapped as LSTA.

• 100M Symbol Interface, the LSTA is mapped as SD.

• 10M Serial Interface, the LSTA is mapped as LSTA.

• Link Pulse Interface, the LSTA is mapped as SD.

MII/SI

Input

Media Independent Interface / Stream Interface (Select).

This pin is used in combination with the 10/LP and 10/100SEL pins to

configure the ICS1892 MAC/Repeater Interface. When the signal on

this pin is logic:

• Low, this pin configures the MAC/Repeater Interface as a Media

Independent Interface.

• High, this pin configures the MAC/Repeater Interface as a Stream

Interface.

NOD/REP

Input

Node/Repeater (Select).

This selection on this pin affects both the SQE test and the Carrier

Sense (CSR) signal. When the signal on this pin is logic:

• Low, this pin enables the ICS1892 to default to node operations.

• High, this pin enables the ICS1892 to default to repeater

operations.

Table 9-5.

Configuration Pins (Continued)

Name

Number

Type

Pin Description

ICS1892 Datasheet(PDF) 107 Page - Integrated Circuit Systems

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