ICS1892
TSD
Chapter 9 Pin Diagram, Listings, and Descriptions
10Base-T/100BIaCseS-TX1I8nt9eg2rated PHYceiver™
9.2.4 MAC/Repeater Interface Pins
This section lists pin descriptions for each of the following interfaces
• Section 9.2.4.1, “MAC/Repeater Interface Pins for Media Independent Interface”
• Section 9.2.4.2, “MAC/Repeater Interface Pins for 100M Symbol Interface”
• Section 9.2.4.3, “MAC/Repeater Interface Pins for 10M Serial Interface”
• Section 9.2.4.4, “MAC/Repeater Interface Pins for Link Pulse Interface”
9.2.4.1 MAC/Repeater Interface Pins for Media Independent Interface
Table 9-6 lists the MAC/Repeater Interface pin descriptions for the MII.
Table 9-6. MAC/Repeater Interface Pins: Media Independent Interface (MII)
Pin
Pin
Pin
Pin Description
Name Number
Type
COL
49
Output Collision (Detect).
The ICS1892 asserts a signal on the COL pin when the ICS1892 detects
receive activity while transmitting (that is, while the TXEN signal is
asserted by the MAC/repeater, that is, when transmitting). When the
mode is:
• 10Base-T, the ICS1892 detects receive activity by monitoring the
un-squelched MDI receive signal.
• 100Base-TX, the ICS1892 detects receive activity when there are two
non-contiguous zeros in any 10-bit symbol derived from the MDI
receive data stream.
Note:
1. The signal on the COL pin is not synchronous to either RXCLK or
TXCLK.
2. In full-duplex mode, the COL signal is disabled and always remains
low.
3. The COL signal is asserted as part of the signal quality error (SQE)
test. This assertion can be suppressed with the SQE Test Inhibit bit (bit
18.2).
CRS
MDC
50
31
Output Carrier Sense.
• In half-duplex mode, the ICS1892 asserts a signal on the CRS pin
when the ICS1892 detects either receive or transmit activity.
• In full-duplex mode and Repeater mode, the ICS1892 asserts a signal
on the CRS pin only when the ICS1892 detects receive activity.
Note: The signal on the CRS pin is not synchronous to either RXCLK or
TXCLK.
Input
Management Data Clock.
The ICS1892 uses the signal on the MDC pin to synchronize the transfer
of management information between the ICS1892 and the Station
Management Entity (STA), using the serial MDIO data line. The MDC
signal is sourced by the STA.
ICS1892, Rev. D, 2/26/01
February 26, 2001
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
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IDT™ / ICS™ 10Base-T/100Base-TX Integrated PHYceiver™
ICS1892
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IDT [ INTEGRATED DEVICE TECHNOLOGY ]
