topic Re: DDR3L routing in i.MX Processors

DDR3L routing

surendrajadhav — Wed, 18 Jan 2017 15:10:49 GMT

Hello,

We are routing DDR3L signals and referring to HW development guide. In this we are routing the signals as per table, which is attached.

As shown in attached figure, does the bigger red circle represent minimum routing length should be Clock(min)-200mil?

As we are routing clock with 1400 mils, so we are allowed to route data and its control signals between 1200 to 1400 mils?

The other doubt is in smaller red circle. Does the dash --- represents the same recommendation to DRAM_D[15:8] are same as DRAM_D[7:0].

Regards,

Surendra J.

Re: DDR3L routing

Carlos_Musich — Wed, 18 Jan 2017 16:45:55 GMT

HI Surendra,

which processor are you using?

Carlos

Re: DDR3L routing

igorpadykov — Wed, 18 Jan 2017 23:29:51 GMT

Hi Surendra

>As shown in attached figure, does the bigger red circle represent minimum routing length should be Clock(min)-200mil?

>Does the dash --- represents the same recommendation to DRAM_D[15:8] are same as DRAM_D[7:0].

Best regards
igor
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Re: DDR3L routing

surendrajadhav — Fri, 20 Jan 2017 03:10:16 GMT

Hello,

This question is for i.MX6UL processor.

@Igor,

Thanks a lot for your reply.

Could you please elaborate then what dash represents in the two red circles?

Regards,

Surendra

Re: DDR3L routing

igorpadykov — Fri, 20 Jan 2017 03:27:08 GMT

Hi Surendra

dash represents no specific restrictions/recommendations.

Best regards
igor