ICS1892 Integrated Circuit Systems, ICS1892 Datasheet - Page 88
ICS1892
Manufacturer Part Number
ICS1892
Description
10Base-T/100Base-TX Integrated PHYceiver
Manufacturer
Integrated Circuit Systems
Datasheet
1.ICS1892.pdf
(148 pages)
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8.11.7 Invalid Error Code Test (bit 16.2)
8.11.8 ICS Reserved (bit 16.1)
8.11.9 Stream Cipher Disable (bit 16.0)
ICS1892, Rev. D, 2/26/01
The Invalid Error Code Test bit allows an STA to force the ICS1892 to transmit symbols that are typically
classified as invalid. The purpose of this test bit is to permit thorough testing of the 4B/5B encoding and the
serial transmit data stream by allowing generation of bit patterns that are considered invalid by the ISO/IEC
4B/5B definition.
When this bit is logic:
•
•
Table 8-17. Invalid Error Code Translation Table
See
The Stream Cipher Disable bit allows an STA to control whether the ICS1892 employs the Stream Cipher
Scrambler in the transmit and receive data paths. When this bit is set to logic:
•
•
Note:
Symbol
Zero, the ISO/IEC defined 4B/5B translation takes place.
One – and the TXER signal is asserted by the MAC/repeater – the MII input nibbles are translated
according to
Zero, the Stream Cipher Encoder and Decoder are both enabled for normal operations.
One, the Stream Cipher Encoder and Decoder are disabled. This action results in an unscrambled data
stream (for example, the ICS1892 transmits unscrambled IDLES, and so forth.
V (S)
ICS1892 Data Sheet
Section 8.11.2, “ICS Reserved (bits
V
V
V
V
H
V
V
R
V
V
K
V
T
J
I
The Stream Cipher Scrambler can be used only for 100-MHz operations.
Invalid Code
Invalid Code
Invalid Code
Invalid Code
Error
Invalid Code
Invalid Code
ESD
Invalid Code
ESD
Invalid Code
SSD
Invalid Code
Invalid Code
SSD
Idle
Table
Meaning
8-17.
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
MII Input
Nibble
0000
0001
0010
0100
0101
1000
1001
1010
1100
0011
0110
0111
1011
1101
1110
1111
16.14:11)”, the text for which also applies here.
Translation
00000
00001
00010
00100
00101
00000
10001
10000
00011
00110
01101
01100
11001
11000
00111
11111
88
Chapter 8 Management Register Set
February 26, 2001
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