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TMS570 query

Karan Advani
Intellectual 1290 points

Other Parts Discussed in Thread: TMS570LS0432, TMS570LS20216, TMS570LS3137

In TI web site in the TMS570 product selection table (in the link given below), there are two columns

one is for "SCI/LIN" another one is for "UART".

http://www.ti.com/lsds/ti/microcontroller/safety_mcu/tms570_arm_cortex-r4/products.page

For TMS570LS0432, under "SCI/LIN" coloumn  the data given is "1/1"  and under UART coloumn it is mentioned as "1".

 

Similarly in the same table for TMS570LS20216 under "SCI/LIN" coloumn data given is "2/2" and under UART it is blank i.e "-"

Our queries are as follows:

1). What does blank under "UART" coloumn for TMS570LS20216 signify?

2).Can these peripherals ( for both TMS570LS0432 & TMS570LS20216) be configured either for LIN 2.0 interface or as general purpose UARTs, or only as LIN2.0 interfaces.

 Also for TMS570LS043 under column for "UART" the data provided is as "1" does it mean that

in addition to configurable "LIN/SCI" peripheral this devioce also has a separate UART?

  • 0
    TI__Guru 69070 points

    Karan,

    I think this is an inconsistency in the product selection table so thanks for pointing this out.

    If you dig into the datasheet, you can find the answer (although obviously this defeats the purpose of the selection table).

    The '0432 has a single LIN module.   The '20216 has a pair of LIN modules. 

    The LIN modules are capable of operating either as a UART or as a LIN interface.  I think this is where it gets confusing because 1/1 on the 432 for SCI/LIN means  '1 SCI OR LIN' not '1 SCI AND 1 LIN'.    UART is synonomous with SCI, and we do have parts like the TMS570LS3137 where there is 1 SCL/LIN module plus 1 SCI (only) module.   So that's probably how this table started, with SCI/LIN meaning a module that supports either mode and SCI meaning a module that only works as a UART.

    I'll report this to our marketing folks.  Hope my answer didn't make it more confusing :) If there's doubt, just check the block diagram in the device datasheet and it will show you all the peripheral modules.

     

  • 0 in reply to Anthony F. Seely
    TI__Intellectual 1290 points

    Hello Anthony,

    Thanks for the response.

    I got a little confused at first but seem to have figured it out now.

    Kindly clarify following for TMS570LS0432 as well:

    Under column for "UART" the data provided is as "1" does it mean that

    in addition to configurable "LIN/SCI" peripheral this devioce also has a separate UART?

    Regards,

    Karan

  • 0 in reply to Karan Advani
    TI__Guru 69070 points

    Hi Karan,

    Not on the '0432.  On that particular product, there is only 1 LIN module.  It can be used as a LIN or a UART.

    On some of the other parts in the table though it means a separate UART ..  So I've reported this to our marketing team and they're in the process of fixing the selection table up.

    The way I know for certain is to look at the block diagram in the datasheet of the '0432:

    There is only one LIN module and no separate SCI module.  Of course you can use the LIN module as a UART (SCI) since it is constructed from an SCI module with some front-end that adds the LIN features.