ICS1892 Integrated Circuit Systems, ICS1892 Datasheet - Page 13
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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Chapter 3 ICS1892 Enhanced Features
ICS1892, Rev. D, 2/26/01
The ICS1892 is an enhanced version of the ICS 1890. In contrast to the ICS 1890, the ICS1892 offers
significant improvements in both performance and features while maintaining backward compatibility. The
specific differences between these devices are listed below.
1. The ICS1892 employs an advanced digital signal processing (DSP) architecture that improves the
2. The analog 10Base-T Receive Phase-Locked Loop (PLL) of the ICS 1890 is replaced with a digital PLL
3. The ICS 1890 Frequency-Locked Loop (FLL) that is part of the 100Base-TX Clock and Data Recovery
4. The ICS1892 transmit circuits are improved in contrast to the ICS 1890, resulting in a decrease in the
5. The ICS1892 supports the Auto-Negotiation Next Page functions described in IEEE Std 802.3u-1995
6. The ICS1892 supports Management Frame (MF) Preamble Suppression.
7. The ICS1892 provides the Remote Jabber capability.
8. The ICS1892 has an improved version of the ICS 1890 10Base-T Squelch operation.
9. The ICS1892 “seeds” (that is, initializes) the Transmit Stream Cipher Shift register by using the
10. The ICS1892 offers an automatic 10Base-T power-down mode.
11. The enhanced features of the ICS1892 required some modifications to the ICS 1890 Management
ICS1892
100Base-TX Receiver performance beyond that of any other PHY in the market. Specifically:
a. The ICS1892 DSP-based, adaptive equalization process allows the ICS1892 to accommodate a
b. The ICS1892 DSP-based, baseline-wander correction process virtually eliminates killer packets.
in the ICS1892, thereby resulting in lower jitter and improved stability.
circuitry is replaced with a digital FLL in the ICS1892, also resulting in lower jitter and improved stability.
magnitude of the 10Base-T harmonic content generated during transmission. (See ISO/IEC 8802-3:
1993 clause 8.3.1.3.)
clause 28.2.3.4.
ICS1892 PHY address from
Registers. However, the ICS1892 Management Registers are backward-compatible with the ICS 1890
Management Registers.
Management Registers.
maximum cable attenuation/insertion loss of 29 dB, which is nearly equivalent to the attenuation
loss of a 150-meter Category 5 cable.
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
Table 3-1
Table
summarizes the differences between the ICS 1890 and the ICS1892
8-16, which minimizes crosstalk and noise in repeater applications.
13
Chapter 3 ICS1892 Enhanced Features
February 26, 2001
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