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| 型号： | WJLXT971ALE.A4-857346 |
| 厂商： | CORTINA SYSTEMS INC |
| 元件分类： | 网络接口 |
| 英文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP64 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64 |
| 文件页数： | 75/80页 |
| 文件大小： | 931K |
| 代理商： | WJLXT971ALE.A4-857346 |
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Page 77
Cortina Systems LXT972A Single-Port 10/100 Mbps PHY Transceiver
LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
9.0 Register Definitions -
Product-Specific Registers
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
Write as ‘0’. Ignore on Read.
R/W
0
Table 54
Digital Configuration Register - Address 26, Hex 1A (Sheet 1 of 2)
Bit
Name
Description
Type 1
Default
26.15:12
Reserved
Write as ‘0’. Ignore on Read.
R/W
0000
26.11
MII Drive Strength
0 = Normal MII drive strength
1 = Increase MII drive strength
R/W
0
26.10
Reserved
Write as ‘0’. Ignore on Read.
R/W
0
26.9
Show Symbol Error
0 = Normal MII_RXER
1 = 100BASE-X Error Signal to MII_RxER
R/W
0
26.8:6
Reserved
Write as ‘0’. Ignore on Read.
RO
0
1. R/W = Read /Write, RO = Read Only
Table 53
LED Configuration Register - Address 20, Hex 14 (Sheet 2 of 2)
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).
Activity causes the LED to blink, regardless of the link status.
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 approximations. Not guaranteed or production tested.
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