About arjun raj

arjun raj · 2018-02-13

Posted on February 13, 2018 at 11:14Hi,I am planning to use a 25MHz crystal as HSE Xtal for STM32f107 and route the same 25MHz Clock as MCO out to drive the ethernet PHY Chip -LAN8742A.From LAN8742A, 50MHz RMIIREFCLK is fed back to stm32f107 EMAC. ...

arjun raj · 2018-02-14

Posted on February 14, 2018 at 10:43Yes TJ,Since we are using a 64 pin package for micro, RMII is better and LAN8742A supports only RMII.BTW did you use LAN8720A? even that supports only RMII ryt?Were you using the below mentioned approach with exte...

arjun raj · 2018-02-13

Posted on February 13, 2018 at 15:28Hi,In your first board were you using the same 25MHz clock as the ethernet MII Ref Clock.Here in my board I am taking 25MHz as the input of PHY Chip and from PHY Chip, 50MHz reference clock for RMII is generated a...

arjun raj · 2018-02-13

Posted on February 13, 2018 at 14:19Hi TJ, I believe here you have used a XTAL oscillator (connected to only pin32 of uC).I was thinking of using lower cost Xtal - FA-238 25.0000MB-C3 (between OSC_In and OSC_Out)and use MCO out of 25MHz from uC to t...

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STM32f107 and 25MHz MCO out to Ethernet PHY LAN8742A

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Re: STM32f107 and 25MHz MCO out to Ethernet PHY LAN8742A

Re: STM32f107 and 25MHz MCO out to Ethernet PHY LAN8742A