About EIM Bus Timing Parameters in i.MX6SL.

[keitanagashima]

Dear All,

Hello.

I have questions about EIM Bus Timing Parameters in i.MX6SL.

Refer to Table 37. EIM Bus Timing Parameters in IMX6SLCEC(Rev.3).

There aren't both specs min & max.

And the spec looks wrong.

On the other hand, there are both specs min & max in i.MX6DQ & i.MX6SDL data sheet.

*Related community thread

Re: About EIM Bus Timing Parameters in i.MX6DQ.

Could you give me a correct specs?

Best Regards,

Keita

[art]

The specifications, given in the Table 37 of the IMX6SLCEC Rev.3 document, are correct. Everywhere the Min. or Max. values of a parameter (except of WE2 and WE3) are not specified, they seem to be meaningless. For WE2 and WE3, the Max. values are 0.6*t*(k+1). For all other cases, the unspecified Min. or Max. values depend on specific EIM configuration, including programmed number of a dummy cycles for a particular event on the EIM bus.

Have a great day,
Artur

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[keitanagashima]

Hi Artur,

I have additional questions.

Q1

> Everywhere the Min. or Max. values of a parameter (except of WE2 and WE3) are not specified, they seem to be meaningless.

Is it possible to guarantee operation by the min value more than 0 ?

*In the FPGA design, min/max both values are necessary.

And, in i.MX6DQ data sheet, the both value are described.

Q2.

Refer to WE11 spec in data sheet.

In i.MX6DQ data sheet :

WE11 : Min = 0.5 × t × (k+1) - 1.25

In i.MX6SL data sheet :

WE11 : Min = 0.5 × t × (k+1) / 2 - 1.25

Why is the spec of WE11 different?

Please tell me the correct specs.

(I think that i.MX6DQ and i.MX6SL are using the same module.)

Best Regards,

Keita

[art]

Q. Is it possible to guarantee operation by the min value more than 0 ?

A. Yes.

Q. Why is the spec of WE11 different? Please tell me the correct specs.

A. WE11 : Min = 0.5 * t * (k+1) - 1.25 is the correct spec. There is a typo in

the i.MX6SL Data Sheet document, will be fixed in the further releases.

Have a great day,
Artur