Kinetis MicrocontrollersのトピックRe: Kinetis K64 Ethernet

Kinetis K64 Ethernet

punyatagayatri — Thu, 18 Sep 2014 14:28:04 GMT

Hi,

I'm using K64 microcontroller and I need to implement Ethernet , hence I'm using suggested PHY KSZ8081 and RJ45 JX0011D21NL .I want to know how to conenct REF_CLK with microprocessor as pin 72 ( PTA18/EXTAL0/FTM0_FLT2/FTM_CLKIN0 ) is being used by external oscillator to provide clock to microprocessor.

Can someone tell me how to set clock for syncing ethernet PHY and microprocessor?

Re: Kinetis K64 Ethernet

mjbcswitzerland — Thu, 18 Sep 2014 15:05:08 GMT

Use the FRDM-K64F circuit diagram as reference.

It connects the EXTAL0 to the PHY's 50MHz REF_CLK.

Make sure that you use the KS8081RNA (generates 50MHz clock form 25MHz crystal) and not the KS8081RND (which requires a 50MHz clock)!!!!

Regards

Mark

Re: Kinetis K64 Ethernet

punyatagayatri — Fri, 19 Sep 2014 06:57:23 GMT

We are using a cystal to program the microprocessor at this pin so its occupied.Is there any provision to synchronise MAC of processor with PHY Ref Clock.

Re: Kinetis K64 Ethernet

Kan_Li — Mon, 10 Nov 2014 07:04:37 GMT

Hi,

There is an alternative clock source for ENET module, you may feed ENET_1588_CLKIN with 50MHz clock as the same as PHY Ref Clock. Please kindly refer to the following for details.

Hope that helps,

Have a great day,
Kan

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