參數(shù)資料
型號(hào)： LXT971A
廠商： Intel Corp.
英文描述： 3.3V Dual-Speed Fast Ethernet PHY Transceiver
中文描述： 3.3雙速快速以太網(wǎng)物理層收發(fā)器
文件頁(yè)數(shù)： 85/90頁(yè)
文件大小： 568K
代理商： LXT971A
LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver
Datasheet
Document #: 249414
Revision #: 002
Rev. Date: August 7, 2002
85
Table 56. LED Configuration Register (Address 20, Hex 14)
Bit
Name
Description
Type
1
Default
20.15:12
LED1
Programming
bits
0000 = Display Speed Status (Continuous, Default)
0001 = Display Transmit Status (Stretched)
0010 = Display Receive Status (Stretched)
0011 = Display Collision Status (Stretched)
0100 = Display Link Status (Continuous)
0101 = Display Duplex Status (Continuous)
0110 = Unused
0111 = Display Receive or Transmit Activity (Stretched)
1000 = Test mode- turn LED on (Continuous)
1001 = Test mode- turn LED off (Continuous)
1010 = Test mode- blink LED fast (Continuous)
1011 = Test mode- blink LED slow (Continuous)
1100 = Display Link and Receive Status combined
2
(Stretched)
1101 = Display Link and Activity Status combined
2
(Stretched)
1110 = Display Duplex and Collision Status combined
4
(Stretched)
1111 = Unused
R/W
0000
20.11:8
LED2
Programming
bits
0000 = Display Speed Status
0001 = Display Transmit Status
0010 = Display Receive Status
0011 = Display Collision Status
0100 = Display Link Status (Default)
0101 = Display Duplex Status
0110 = Unused
0111 = Display Receive or Transmit Activity
1000 = Test mode- turn LED on
1001 = Test mode- turn LED off
1010 = Test mode- blink LED fast
1011 = Test mode- blink LED slow
1100 = Display Link and Receive Status combined
2
(Stretched)
1101 = Display Link and Activity Status combined
2
(Stretched)
1110 = Display Duplex and Collision Status combined
4
(Stretched)
1111 = Unused
R/W
0100
1. R/W = Read /Write
RO = Read Only
LH = Latching High
2. Link status is the primary LED driver. The LED is asserted (solid ON) when the link is up.
The secondary LED driver (Receive or Activity) causes the LED to change state (blink).
3. Combined event LED settings are not affected by Pulse Stretch Register bit 20.1. These display settings
are stretched regardless of the value of 20.1.
4. Duplex status is the primary LED driver. The LED is asserted (solid ON) when the link is full-duplex.
Collision status is the secondary LED driver. The LED changes state (blinks) when a collision occurs.
5. Values are relative approximations. Not guaranteed or production tested.
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