ICS1893 datasheet(101/152 Pages) ICST

101 / 152 page

Chapter 8

Management Register Set

ICS1893 Rev C 6/6/00

June, 2000

101

ICS1893 - Release

8.14.1

Node/Repeater Configuration (bit 19.15)

The Node/Repeater Configuration bit directly indicates the state of the NOD/REP input pin. When this bit is

logic:

• Zero, the NOD/REP input pin is pulled down, which instructs the operation code to operate in Node

mode.

• One, the NOD/REP input pin is pulled up, which instructs the ICS1893 to operate in Repeater mode.

There are two primary differences between Node mode and Repeater mode.

• In Node mode:

– The SQE Test default setting is enabled.

– The Carrier Sense signal (CRS) is asserted in response to either transmit or receive activity.

• In Repeater mode:

– The SQE Test default setting is disabled.

– The Carrier Sense signal (CRS) is asserted in response only to receive activity.

8.14.2

Hardware/Software Priority Status (bit 19.14)

The Hardware/Software Priority Status bit directly indicates the state of the HW/SW pin. When this bit is

logic:

• Zero, the hardware pins have priority over the (software) register bits for establishing the ICS1893

configuration.

• One, the (software) register bits have priority over the hardware pins for establishing the ICS1893

configuration.

8.14.3

Remote Fault (bit 19.13)

The ISO/IEC specification defines bit 5.13 as the Remote Fault bit, and bit 19.13 is functionally identical to

bit 5.13. The Remote Fault bit is set based on the Link Control Word received from the remote link partner.

When this bit is a logic:

• Zero, it indicates the remote link partner does not detect a Link Fault.

• One, it indicates to an STA that the remote link partner detects a Link Fault.

8.14.4

ICS Reserved (bits 19.12:8)

See Section 8.11.2, “ICS Reserved (bits 16.14:11)”, the text for which also applies here.

ICS1893 датащи(PDF) 101 Page - Integrated Circuit Systems