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AM3894（DM814x）IBIS Model selection

Ayus
Intellectual 825 points

Hello,

 

We are using the preliminary Centaurus IBIS Model provided in this post.

In this IBIS Model, Selector_1 is used for GPMC pins.

But there are 3 models defined for Selector_1(as shown below).

 

Could you please let us know which model should be used out of these three models?

 

[Model Selector] Selector_1

Model_411 INPUT,3.3V,PD

Model_412 INPUT,3.3V,PU

Model_413 I/O,3.3V,PI

 

 

In our case we would like to simulate below pins.

 

・GPMC_A[0-27]

・GPMC_D[0-15]

・GPMC_WAIT

・GPMC_BE0_CLE

・GPMC_BE1

・GPMC_ADV_ALE

・GPMC_OE_RE

・GPMC_WE

・GPMC_CS[0-5]

 

Please let us know out of these 3 Models, which Model should we use for GPMC pins.

 

Regards,

Ayus

  • 0
    TI__Mastermind 43875 points

    Ayus,

    I think you are using an older release model. The latest file is centaurus20.ibs. With this latest file there is also an accompanying datasheet file which explains a little more about each of the models.

    In this 2.0 model selector_1 contains the following selectors

    Model_13 I/O,1.8V,Pull-up/down off,slow,IND,10%
    Model_14 I/O,1.8V,Pull-down,fast,IND,10%
    Model_15 I/O,1.8V,Pull-down,slow,IND,10%
    Model_16 I/O,1.8V,Pull-up,fast,IND,10%
    Model_17 I/O,1.8V,Pull-up/down off,fast,IND,10%
    Model_18 I/O,1.8V,Pull-up,slow,IND,10%
    Model_19 I/O,3.3V,Pull-up/down off,slow,IND,10%
    Model_20 I/O,3.3V,Pull-down,fast,IND,10%
    Model_21 I/O,3.3V,Pull-down,slow,IND,10%
    Model_22 I/O,3.3V,Pull-up,fast,IND,10%
    Model_23 I/O,3.3V,Pull-up/down off,fast,IND,10%
    Model_24 I/O,3.3V,Pull-up,slow,IND,10%

    So I know you must be looking at a different file.

    The newer file is also referenced in the previous forum link you provided.

    BR,

    Steve