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參數(shù)資料
| 型號(hào)： | RTL8801 |
| 英文描述： | Specifications |
| 中文描述： | 規(guī)格 |
| 文件頁(yè)數(shù)： | 2/19頁(yè) |
| 文件大?。?/td> | 318K |
| 代理商： | RTL8801 |
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RTL8801
Preliminary
1999/3
2
transmitted differentially on the TPA cable pair(s).
During packet reception the TPA and TPB transmitters of the receiving cable port are disabled, and
the receivers for that port are enabled. The encoded data information is received on the TPA cable
pair, and the encoded Strobe information is received on the TPB cable pair. The received
data-strobe information is decoded to recover the received clock signal and the serial data bits. The
serial data bits are split into two or four parallel transmitted (repeated) out of the other active
(connected) cable ports.
Both the TPA and TPB cable interfaces incorporate differential comparators to monitor the line
states during initialization and arbitration. The output of these comparators are used by the internal
logic to determine the arbitration status. The TPA channel monitors the incoming cable
common-mode voltage. The value of this common mode voltage is used during arbitration to set the
speed of the next packet transmission. In addition, the TPB channel monitors the incoming cable
common-mode voltage for the presence of the remotely supplied twisted-pair bias voltage. The
presence or absence of this common-mode voltage is used as an indication of cable connection
status. The cable connection status signal is internally debounced in the RTL8801 on a cable
disconnect-to-connect. The debounced cable connection status signal initiates a bus reset. On a
cable disconnect-to-connect a debounce delay is incorporated. There is no delay on a cable
disconnect.
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