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ICS1893 数据表(PDF) 97 Page - Integrated Circuit Systems |
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ICS1893 数据表(HTML) 97 Page - Integrated Circuit Systems |
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97 / 152 page  Chapter 8 Management Register Set ICS1893 Rev C 6/6/00 June, 2000 97 ICS1893 - Release Copyright © 2000, Integrated Circuit Systems, Inc. All rights reserved. 8.13 Register 18: 10Base-T Operations Register The 10Base-T Operations Register provides an STA with the ability to monitor and control the ICS1893 activity while the ICS1893 is operating in 10Base-T mode. Note: 1. For an explanation of acronyms used in Table 8-20, see Chapter 1, “Abbreviations and Acronyms”. 2. During any write operation to any bit in this register, the STA must write the default value to all Reserved bits. 8.13.1 Remote Jabber Detect (bit 18.15) The Remote Jabber Detect bit is provided to indicate that an ICS1893 port has detected a Jabber Condition on its receive path. This bit is reset to logic zero on a read of the 10Base-T operations register. When this bit is logic: • Zero, it indicates a Jabber Condition has not occurred on the port’s receive path since either the last read of this register or the last reset of the associated port. • One, it indicates a Jabber Condition has occurred on the port’s receive path since either the last read of this register or the last reset of the associated port. This bit is a latching high bit. (For more information on latching high and latching low bits, see Section 8.1.4.1, “Latching High Bits”and Section 8.1.4.2, “Latching Low Bits”.) Note: This bit is provided for information purposes only (that is, no actions are taken by the port). The ISO/IEC specification defines the Jabber Condition in terms of a port’s transmit path. To set this bit, an ICS1893 port monitors its receive path and applies the ISO/IEC Jabber criteria to its receive path. Table 8-20. 10Base-T Operations Register (register 18 [0x12]) Bit Definition When Bit = 0 When Bit = 1 Ac- cess SF De- fault Hex 18.15 Remote Jabber Detect No Remote Jabber Condition detected Remote Jabber Condition Detected RO LH 0 – 18.14 Polarity reversed Normal polarity Polarity reversed RO LH 0 18.13 ICS reserved Read unspecified Read unspecified RW/0 – – 18.12 ICS reserved Read unspecified Read unspecified RW/0 – – 18.11 ICS reserved Read unspecified Read unspecified RW/0 – – – 18.10 ICS reserved Read unspecified Read unspecified RW/0 – – 18.9 ICS reserved Read unspecified Read unspecified RW/0 – – 18.8 ICS reserved Read unspecified Read unspecified RW/0 – – 18.7 ICS reserved Read unspecified Read unspecified RW/0 – – – 18.6 ICS reserved Read unspecified Read unspecified RW/0 – – 18.5 Jabber inhibit Normal Jabber behavior Jabber Check disabled RW – 0 18.4 ICS reserved Read unspecified Read unspecified RW/1 – 1 18.3 Auto polarity inhibit Polarity automatically corrected Polarity not automatically corrected RW – 0 0 18.2 SQE test inhibit Normal SQE test behavior SQE test disabled RW – 0 18.1 Link Loss inhibit Normal Link Loss behavior Link Always = Link Pass RW – 0 18.0 Squelch inhibit Normal squelch behavior No squelch RW – 0 |
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