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参数资料
型号： WJLXT972ALC.A4SE000
厂商： CORTINA SYSTEMS INC
元件分类： 网络接口
英文描述： DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装： LEAD FREE, LQFP-64
文件页数： 69/100页
文件大小： 1046K
代理商： WJLXT972ALC.A4SE000
LXT972A 3.3 V Dual-Speed Fast Ethernet Transceiver
70
Datasheet
Document #: 249186
Revision #: 003
Rev. Date: August 7, 2002
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)3
1101 = Display Link and Activity Status combined 2
(Stretched)3
1110 = Display Duplex and Collision Status combined 4
(Stretched)3
1111 = Unused
R/W
0100
20.7:4
LED3
Programming
bits
0000 = Display Speed Status
0001 = Display Transmit Status
0010 = Display Receive Status (Default)
0011 = Display Collision Status
0100 = Display Link Status
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)3
1101 = Display Link and Activity Status combined 2
(Stretched)3
1110 = Display Duplex and Collision Status combined 4
(Stretched)3
1111 = Unused
R/W
0010
20.3:2
LEDFREQ5
00 = Stretch LED events to 30 ms.
01 = Stretch LED events to 60 ms.
10 = Stretch LED events to 100 ms.
11 = Reserved.
R/W
00
20.1
PULSE-
STRETCH
0 = Disable pulse stretching of all LEDs.
1 = Enable pulse stretching of all LEDs.
R/W
1
20.0
Reserved
Ignore.
R/W
N/A
Table 52. LED Configuration Register (Address 20, Hex 14) (Continued)
Bit
Name
Description
Type 1
Default
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 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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