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ICS1893CF 数据表(PDF) 82 Page - Integrated Circuit Systems

部件名 ICS1893CF
功能描述  3.3-V 10Base-T/100Base-TX Integrated PHYceive
PDF  126 Pages
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制造商  ICST [Integrated Circuit Systems]
网页  http://www.icst.com
标志 ICST - Integrated Circuit Systems

ICS1893CF 数据表(HTML) 82 Page - Integrated Circuit Systems

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ICS1893CF, Rev. F, 03/01/07
Mar. 2007
82
Chapter 7 Management Register Set
ICS1893CF Data Sheet - Release
Copyright © 2007, Integrated Device Technology, Inc.
All rights reserved.
Definitions:
straight transmit = TP_AP & TP_AN
receive = TP_BP & TP_BN
cross
transmit = TP_BP & TP_BN
receive = TP_AP & TP_AN
AMDIX_EN (Pin 10)AMDIX enable pin with 50 kOhm pull-up resistor
AMDIX_EN [19:9] MDIO register 13h bit 9
MDI_MODE [19:8] MDIO register 13h bit 8
7.14.6 Twisted Pair Tri-State Enable, TPTRI (bit 19.7)
The ICS1893CF provides a Twisted Pair Tri-State Enable bit. This bit forces the TP_TXP and TP_TXN
signals to a high-impedance state. When this bit is set to logic:
• Zero, the Twisted Pair Interface is operational.
• One, the Twisted Pair Interface is tri-stated.
7.14.7 ICS Reserved (bits 19.6:1)
See Section 7.11.2, “ICS Reserved (bits 16.14:11)”, the text for which also applies here.
7.14.8 Automatic 100Base-TX Power-Down (bit 19.0)
The Automatic 100Base-TX Power Down bit provides an STA with the means of enabling the ICS1893CF
to automatically shut down 100Base-TX support functions when 10Base-T operations are being used.
When this bit is set to logic:
• Zero, the 100Base-TX Transceiver does not power down automatically in 100Base-TX mode.
• One, and the ICS1893CF is operating in 10Base-T mode, the 100Base-TX Transceiver automatically
turns off to reduce the overall power consumption of the ICS1893CF.
Note: There are other means of powering down the 100Base-TX Transceiver (for example, when the
entire device is isolated using bit 0:10).
1
1
x
straight / cross (auto
selected)
Default Values:
1
1
0
straight / cross (auto
selected)
Table 7-22. AMDIX_EN (Pin 10) and Control Bits 19. 9:8
AMDIX_EN
(Pin 10)
AMDIX_EN
[Reg 19:9]
MDI_MODE
[Reg 19:8]
Tx/Rx MDI
Configuration



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