ICS1893 datasheet(107/152 Pages) ICST

107 / 152 page

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1893 Rev C 6/6/00

June, 2000

107

ICS1893 - Release

P1CL

Input or

Output

PHY (Address Bit) 1 / Collision LED.

For more information on this pin, see Section 6.8, “Status Interface”.

• This multi-function configuration pin is:

– An input pin during either a power-on reset or a hardware reset. In

this case, this pin configures the ICS1893 when it is in either

hardware mode or software mode.

– An output pin following reset. In this case, this pin provides collision

status for the ICS1893.

As an input pin:

• This pin, in combination with the 10/100SEL pin, selects the operating

modes of the ICS1893 MAC/repeater Interfaces, either 10M MII, 100M

MII, 10M Serial, or 100M Symbol. When the signal on this pin is logic:

– Low, the ICS1893 configures its MAC/repeater Interface as a Media

Independent Interface.

– High, the ICS1893 configures its MAC/repeater Interface as a

Stream Interface (that is, either a 10M Serial Interface or a 100M

Symbol Interface).

As an output pin:

• When the signal on this pin is:

– De-asserted, this state indicates the ICS1893 does not detect any

collisions.

– Asserted, this state indicates the ICS1893 detects collisions.

• The ICS1893 asserts its Collision LED for a period of approximately 70

msec when it detects a collision.

Caution:

This pin must not float. (See the notes at Section 9.3.2,

“Multi-Function (Multiplexed) Pins: PHY Address and LED

Pins”.)

Table 9-3.

PHY Address and LED Pins

Name

Number

Type

Pin Description

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