ICS1893CY-10LF View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
MFG CO.
'ICS1893CY-10LF' PDF : 143 Pages View PDF
ICS1893CY-10 - Release
Chapter 8 Pin Diagram, Listings, and Descriptions
Table 8-5. MAC/Repeater Interface Pins: Media Independent Interface (MII) (Continued)
Pin
Name
RXER
RXTRI
Pin
Number
39
41
Pin
Type
Output
Input
Pin Description
Receive Error.
When the MAC/Repeater Interface is in:
• 10M MII mode, RXER is not used.
• 100M MII mode, the ICS1893CY-10 asserts a signal on the RXER pin
when either of the following two conditions are true:
– Errors are detected during the reception of valid frames
– A False Carrier is detected
Note:
1. An ICS1893CY-10 asserts a signal on the RXER pin upon detection of
a False Carrier so that repeater applications can prevent the
propagation of a False Carrier.
2. The RXER signal always transitions synchronously with RXCLK.
3. The signal on RXER pin is conditioned by the RXTRI pin.
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 ICS1893CY-10 acts to ensure that only one PHY is active at a time.
TXCLK
43
Output Transmit Clock.
The ICS1893CY-10 generates this clock signal to synchronize the transfer
of data from the MAC/Repeater Interface to the ICS1893CY-10. When the
mode is:
• 10Base-T, the TXCLK frequency is 2.5 MHz.
• 100Base-TX, the TXCLK frequency is 25 MHz.
TXD0
TXD1
TXD2
TXD3
45
Input Transmit Data 0–3.
46
• TXD0 is the least-significant bit and TXD3 is the most-significant bit of
47
the MII transmit data nibble received from the MAC/repeater.
48
• The ICS1893CY-10 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.
ICS1893CY-10 Rev 1/07
Copyright © 2007, Integrated Device Technology, Inc.
All rights reserved.
109
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