ICS1893 Datasheet, PDF (107/152 Pages) Integrated Circuit Systems – 3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

ICS1893 - Release
Chapter 9 Pin Diagram, Listings, and Descriptions
Table 9-3. PHY Address and LED Pins
Pin
Pin
Pin
Name Number Type
Pin Description
P1CL
59 Input or PHY (Address Bit) 1 / Collision LED.
Output 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”.)
ICS1893 Rev C 6/6/00
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
107
June, 2000