ICS1893 Integrated Circuit Systems, ICS1893 Datasheet - Page 28

• Manufacturer Part Number: ICS1893
• Description: 3.3-V 10Base-T/100Base-TX Integrated PHYceiver
• Manufacturer: Integrated Circuit Systems

ICS1893 Rev C 6/6/00
Table 6-1
Table 6-1.
COL
CRS
MDC
MDIO
RXCLK
RXD0
RXD1
RXD2
RXD3
RXDV
RXER
TXCLK
TXD0
TXD1
TXD2
TXD3
TXEN
TXER
MII Pin Names
10M / 100M
ICS1893 Data Sheet - Release
Default
lists the pin mappings for the ICS1893 100M Symbol Interface mode.
Pin Mappings for 100M Symbol Interface Mode
No connect. [Because the MAC/repeater sources both active and ‘ idle’ data, a PHY
cannot distinguish between an active and idle transmission channel (that is, to a PHY
the transmit channel always appears active). Therefore, a PHY cannot accurately
detect a collision.]
SCRS
MDC
MDIO
SRCLK
SRD0
SRD1
SRD2
SRD3
No connect. (Data exchanged between the MAC/repeater and a PHY is not framed in
the 100M Symbol Interface mode. Therefore, RXDV has no meaning.)
SRD4
STCLK
STD0
STD1
STD2
STD3
No connect. (100Base-TX operations require continuous transmission of data.
Therefore, the MAC/repeater is responsible for sourcing IDLE symbols when it is not
transmitting data.)
STD4
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
MAC/Repeater Interface Pin Mappings, Configured for
100M Symbol Interface Mode
28
Chapter 6 Interface Overviews
June, 2000