ICS1893BF Data Sheet - Release
Chapter 8 Pin Diagram, Listings, and Descriptions
Table 8-7. MAC Interface Pins: Media Independent Interface (MII) (Continued)
Pin
Pin
Pin
Pin Description
Name Number
Type
TXD0
TXD1
TXD2
TXD3
39
40
41
42
Input
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.
• The ICS1893BF 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.
TXEN
38
Input
Transmit Enable.
In MII mode:
• The ICS1893BF samples its TXEN signal to determine when data is
available for transmission. When TXEN is asserted, the ICS1893BF
begins sampling the data nibbles on the transmit data lines TXD[3:0]
synchronously with TXCLK. The ICS1893BF then transmits this data
over the media.
• Following the de-assertion of TXEN, the ICS1893BF terminates
transmission of nibbles over the media.
ICS1893BF, Rev. E, 8/11/09
August, 2009
Copyright © 2009, IDT, Inc.
All rights reserved.
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