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參數(shù)資料
型號(hào)： W89C982
廠商： WINBOND ELECTRONICS CORP
英文描述： INTEGRATED MULTIPLE REPEATER II
中文描述： 集成的多中繼二
文件頁(yè)數(shù)： 13/28頁(yè)
文件大小： 277K
代理商： W89C982
Preliminary W89C982AF
Publication Release Date: November 1996
- 13 -
Revision A1
Read Bit Rate Error Status of TP Ports
The bit rate error status of the TP ports can be read using this command. Bits 0 through 7 correspond
to the polarity status of TP ports 0 through 7. A "1" on the MSO bit indicates that a bit rate error has
occurred and a "0" indicates no bit rate error has occurred.
Read MJLP Status
The MAU jabber lock-up protection status can be accessed using this command. A "1" on the MSB
indicates the transmit function of the IMPR II has been inhibited. The status can also be cleared using
this command.
Read AUI Port Status
The AUI port status, including partition, bit rate error, SQE test, and loopback error, can be accessed
using different variations of this command. Four different specific commands can be used, as shown
in the following table.
MSI DATA
10001111
10001011
10001101
10001001
MSO DATA
PBSL0000
PBSL0000
PBSL0000
PBSL0000
CLEAR BITS
B, S, L read cleared. P not cleared.
S, L read cleared. P, B not cleared.
B read cleared. P, S, L not cleared.
P, B, S, L not cleared.
Enable AUI Port
When disabled, the AUI port can be re-enabled using this command. The AUI port will then carry out
normal transmitting and receiving operations. To reconnect a partitioned AUI port, the port must first
be disabled and then re-enabled using this command.
Disable AUI Port
This command is used to disable the AUI port. When the AUI port is disabled, all inputs (the carrier
sense and the SQE) to the AUI port will be ignored by the IMPR II and the IMPR II will not transmit
any signal on the AUI port. In addition, the partition machine for the AUI port will be forced into idle
status.
Enable TP Ports
This command is used to enable a disabled TP port, allowing it to perform normal transmitting and
receiving operations. To reconnect a partitioned TP port or force a TP port into link fail state, the port
must first be disabled and then re-enabled using this command.
Disable TP Ports
Each TP port can be disabled individually. Bits 0, 1, and 2 are used to indicate the TP port that is to
be disabled, as follows:
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