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參數(shù)資料
| 型號(hào)： | L80600 |
| 英文描述： | L80600 10/100/1000 Mbits/s Ethernet PHY technical manual 3/01 |
| 中文描述： | L80600 10/100/1000 Mbits /秒以太網(wǎng)PHY技術(shù)手冊(cè)3月1日 |
| 文件頁(yè)數(shù)： | 130/192頁(yè) |
| 文件大?。?/td> | 1344K |
| 代理商： | L80600 |
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6-16
Applications
write was successful, one should rewrite register 0x1E with the original
address and then read register 0x1D.
There are no plans to change the Asymmetrical Pause register.
6.9.3 Next Page
The Next Page operation is not IEEE 802/3ab compliant. When the
L80600 sends its last Next Page (register 0x04, bit 15 = 0), the L80600
stops the Next Page exchange with its Link Partner prematurely, without
going through the final page. This causes the Link Partner to time out
and a link is not established. This only occurs when the Link Partner has
more Next Pages to send than the L80600. If the Link Partner has the
same or fewer Next Pages to send than the L80600, the L80600
completes AutoNegotiation.
This problem only impacts systems that need to exchange Next page
information. Firmware can be loaded either through MDIO writes or
through EEPROM if Next Page operation is needed.
There are no plans to change the Next Page operation.
6.9.4 LED
A problem exists with the LED_ACT (pin 200), LED_COL (pin 201),
LED_TX (pin 205), and LED_RX (pin 207) pins when PHY addresses
other than 0b00001, 0b00100 or 0b00101 are used. Pins 200, 201, 205,
and 207 are dual-purpose pins. When the part is first powered up, these
pins act as inputs and load the PHY address. After power-up, these pins
become outputs that drive LEDs. The outputs are either an active-HIGH
output when the pin is a pull-down or an active-LOW output when the pin
is a pull-up. Only certain PHY address bits are vulnerable to this failure
mode:
Pulling PHYAD_1 (pin 200) HIGH causes the Collision LED to always
remain off even when a collision event is detected.
Pulling PHYAD_3 (pin 205) HIGH causes the Transmit LED to always
remain off even when a transmit event is detected.
Pulling PHYAD_4 (pin 207) HIGH causes the Receive LED to always
remain off even when a receive event is detected.
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