ICS1893AFLF Datasheet, PDF (108/136 Pages) Integrated Device Technology – 3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

ICS1893AF Data Sheet - Release
Chapter 9 Pin Diagram, Listings, and Descriptions
Table 9-8. MAC/Repeater Interface Pins: Media Independent Interface (MII) (Continued)
Pin
Name
TXD0,
TXD1,
TXD2,
TXD3
Pin
Number
39,
40,
41,
42
TXEN
38
Pin
Type
Input
Input
Pin Description
Transmit Data 0–3.
• TXD0 is the least-significant bit and TXD3 is the most-significant bit of
the MII transmit data nibble received from the MAC/repeater.
• The ICS1893AF samples its TXEN signal to determine when data is
available for transmission. When TXEN is asserted, the signals on a
the TXD[3:0] pins are sampled synchronously on the rising edges of
the TXCLK signal.
Transmit Enable.
In MII mode:
• The ICS1893AF samples its TXEN signal to determine when data is
available for transmission. When TXEN is asserted, the ICS1893AF
begins sampling the data nibbles on the transmit data lines TXD[3:0]
synchronously with TXCLK. The ICS1893AF then transmits this data
over the media.
• Following the de-assertion of TXEN, the ICS1893AF terminates
transmission of nibbles over the media.
ICS1893AF, Rev D 10/26/04
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
108
October, 2004