ICS1892 Datasheet, PDF (114/148 Pages) Integrated Circuit Systems – 10Base-T/100Base-TX Integrated PHYceiver

ICS1892 Data Sheet
Chapter 9 Pin Diagram, Listings, and Descriptions
Table 9-7. MAC/Repeater Interface Pins: 100M Symbol Interface (Continued)
MII Pin 100M Pin
Name Symbol No.
Pin
Name
Pin
Type
Pin Description
RXD0, SRD0,
35,
RXD1, SRD1,
34,
RXD2, SRD2,
33,
RXD3 SRD3
32
Symbol Receive Data 0–3.
• SRD0 is the least-significant bit and SRD3 is the
most-significant bit of the MII receive data nibble.
• While the ICS1892 asserts RXDV, the ICS1892 transfers the
receive data signals on the SRD0–SRD3 pins to the
MAC/Repeater Interface synchronously on the rising edges
of SRCLK.
RXDV –
36
No Receive Data Valid.
Connect For the 100M Symbol Interface, this pin is a no connect. For
more information, see Table 6-1.
RXER SRD4
38 Output Symbol Receive Data 4.
This pin’s description is the same as that given in Table 9-6.
RXTRI
39 Input Receive (Interface), Tri-State.
The input on this pin is from a MAC. When the signal on this pin
is logic:
• Low, the MAC indicates that it is not in a tri-state condition.
• High, the MAC indicates that it is in a tri-state condition. In
this case, the ICS1892 acts to ensure that only one PHY is
active at a time.
TXCLK STCLK
43
Symbol Transmit Clock.
This pin’s description is the same as that given in Table 9-6. For
100Base-Tx
TXD0–3
STD0,
STD1,
STD2,
STD3
45, Input Symbol Transmit Data 0–3.
46,
• STD0 is the least-significant bit and STD3 is the
47,
most-significant bit of the MII transmit data nibble received
48
from the MAC/repeater.
• While the ICS1892 asserts TXEN, the signals on the
STD0–3 pins are sampled by the ICS1892 synchronously on
the rising edges of STCLK.
TXEN –
44
No Transmit Enable.
Connect For the 100M Symbol Interface, this pin is a no connect. For
more information, see Table 6-1.
TXER STD4
42 Input Symbol Transmit Data 4.
This pin’s description is the same as that given in Table 9-6.
ICS1892, Rev. D, 2/26/01
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
114
February 26, 2001