AM5706 PRU2 MII接法疑问,关于PR2_MII0_COL、PR2_MII0_RXLINK的接法,AM571x评估板原理图12页,通过0Ω电阻跳接,PHY的COL信号接到PR2_MII0_RXLINK,PR2_MII0_COL悬空。
1、PR2_MII0_RXLINK信号的作用?R178、R188是不是只能装一个?分别装R178、R188时有何区别?
2、COL信号只用于半双工模式,在全双工模式中有没有用?
3、我们的PHY芯片用的是KSZ8041FTLI,全双工、10M/100M自协商
Nancy Wang:
找了一些相关的资料可以参考一下。
tao hou2
1、PR2_MII0_RXLINK信号的作用?R178、R188是不是只能装一个?分别装R178、R188时有何区别?
https://e2e.ti.com/support/processors/f/791/t/738135
6.1章节 http://www.ti.com/lit/ug/sprui97b/sprui97b.pdf
The COL functionality on the MII interface is not used. The TLK105L contains a feature that must be enabled via software that provides rapid link status on the COL pin. Therefore, this pin is connected to the RXLINK input to the PRU-ICSS ports for this purpose.
tao hou2
2、COL信号只用于半双工模式,在全双工模式中有没有用?
http://processors.wiki.ti.com/index.php/Processor_SDK_RTOS_ICSS-EMAC-Design#Half_Duplex_Support