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參數(shù)資料
| 型號(hào)： | DJIXF972MQEA4 |
| 廠商： | Intel Corp. |
| 英文描述： | Single-Port 10/100 Mbps PHY Transceiver |
| 中文描述： | 單端口10/100 Mbps的物理層收發(fā)器 |
| 文件頁(yè)數(shù)： | 39/92頁(yè) |
| 文件大小： | 666K |
| 代理商： | DJIXF972MQEA4 |
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Intel
LXT972M Single-Port 10/100 Mbps PHY Transceiver
Datasheet
Document Number: 302875-005
Revision Date: 27-Oct-2005
39
5.6.4
Carrier Sense
Carrier Sense (CRS) is an asynchronous output.
CRS is always generated when the LXT972M Transceiver receives a packet from the line.
CRS is also generated when the LXT972M Transceiver is in half-duplex mode when a packet
is transmitted.
Table 14
summarizes the conditions for assertion of carrier sense, data loopback, and collision
signals. Carrier sense is not generated when a packet is transmitted and in full-duplex mode.
5.6.5
Error Signals
When the LXT972M Transceiver is in 100 Mbps mode and receives an invalid symbol from the
network, it asserts RX_ER and drives “0101” on the RXD pins.
The TX_ER function that forces ‘H’ symbols out on the TPOP/TPON twisted pair is not
implemented in the LXT972M Transceiver.
5.6.6
Collision
The LXT972M Transceiver asserts its collision signal asynchronously to any clock whenever the
line state is half-duplex and the transmitter and receiver are active at the same time.
Table 14
summarizes the conditions for assertion of carrier sense, data loopback, and collision signals.
Table 14. Carrier Sense, Loopback, and Collision Conditions
Speed
Duplex Condition
Carrier Sense
Test
Loop-
back
1, 2
Operational
Loop-
back
1, 2
Collision
100
Mbps
Full-Duplex
Receive Only
Yes
No
None
Half-Duplex
Transmit or Receive
No
No
Transmit and Receive
10
Mbps
Full-Duplex
Receive Only
Yes
No
None
Half-Duplex,
Register bit 16.8 = 0
Transmit or Receive
Yes
Yes
Transmit and Receive
Half-Duplex,
Register bit 16.8 = 1
Transmit or Receive
No
No
Transmit and Receive
1. Test Loopback is enabled when Register bit 0.14 = 1.
2. For descriptions of Test Loopback and Operational Loopback, see
Section 5.6.7, “Loopback” on page 40
.
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相關(guān)代理商/技術(shù)參數(shù) |
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| DJIXF972MTAA4 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Single-Port 10/100 Mbps PHY Transceiver |
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