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The SERDES can be used in SGMII mode to connect to external PHY, either on-board or via the SFP connector
从这句话来看,serdes好像是能控制光口
手册上还有几句话
PHY Power-Down State
The PHY enters a power-down state when none of its clients are enabled. In this case, a link is not
required to be maintained. The following conditions must be met for the PHY to enter this powerdown
state:
• PHY power down is enabled through the EEPROM/NVM PHY Power Down Enable bit.
SerDes Power-Down State
The Serializer/Deserializer (SerDes) enters a power-down state when none of its clients are
enabled. This case does not require a link to be maintained. The following conditions must be met
for the SerDes to enter this power-down state:
• SerDes power down is enabled through the EEPROM SerDes Low Power Enable bit.
Ethernet Controller Power-Down State1
The Ethernet controller enters a global power-down state if all of the following conditions are met:
• The device Dr power down enable EEPROM/NVM bit was set (hardware default value is
disabled).
大概是说三个东西各自控制power-down的方法,也确实在phy的寄存器里边找到了power-down的位,但是serdes寄存器的说明很少,都没有写哪个位是干嘛的,我曾经试过32位,循环往里写1,有时候能断电,估计是组合位,谁有这方面的说明啊,谢谢了啊 |
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