1893CFLFT IDT, 1893CFLFT Datasheet - Page 93

• Manufacturer Part Number: 1893CFLFT
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT

Specifications of 1893CFLFT

• Rohs: yes
• Part # Aliases: ICS1893CFLFT

ICS1893CK-40, Rev. C, 06/02/09
Table 8-7. MAC Interface Pins: Media Independent Interface (MII) (Continued)
RXER
TXCLK
TXD0
TXD1
TXD2
TXD3
TXEN
Name
Pin
ICS1893CK-40 Data Sheet Rev. C - Release
Number
Pin
24
26
28
29
30
31
27
Output
Output
Type
Input
Input
Pin
Copyright © 2009, Integrated Device Technology, Inc.
Receive Error.
When the MAC Interface is in:
Transmit Clock.
The ICS1893CK-40 generates this clock signal to synchronize the
transfer of data from the MAC Interface to the ICS1893CK-40. When the
mode is:
Transmit Data 0–3.
Transmit Enable.
In MII mode:
1. An ICS1893CK-40 asserts a signal on the RXER pin upon detection of
2. The RXER signal always transitions synchronously with RXCLK.
3. The signal on RXER pin is conditioned by the RXTRI pin.
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•
Note:
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•
•
•
•
•
10M MII mode, RXER is not used.
100M MII mode, the ICS1893CK-40 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
a False Carrier so that repeater applications can prevent the
propagation of a False Carrier.
10Base-T, the TXCLK frequency is 2.5 MHz.
100Base-TX, the TXCLK frequency is 25 MHz.
TXD0 is the least-significant bit and TXD3 is the most-significant bit of
the MII transmit data nibble received from the MAC.
The ICS1893CK-40 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.
The ICS1893CK-40 samples its TXEN signal to determine when data
is available for transmission. When TXEN is asserted, the
ICS1893CK-40 begins sampling the data nibbles on the transmit data
lines TXD[3:0] synchronously with TXCLK. The ICS1893CK-40 then
transmits this data over the media.
Following the de-assertion of TXEN, the ICS1893CK-40 terminates
transmission of nibbles over the media.
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93
Chapter 8 Pin Diagram, Listings, and Descriptions
Pin Description
June 2009