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MSP430FR5043: TACLK and INCLK connection to MSP430

Bivin George
Expert 1057 points
Part Number: MSP430FR5043

Hi

In user guides it is mentioned that " TACLK and INCLK are external clocks that can be connected to MSP430 through external pins." .

1. Are TACLK & INCLK two separate options at pin level.

2. Can i use any GPIO as input clock for timers in addition to TA1CLK, TA0CLK, & TB0CLK ?

3. What is the purpose of TA1.0 TA1.1 TA1.2 pins

Please reply.

  • 0
    TI__Guru 68011 points

    Hi Bivin,

    Bivin George said:
    1. Are TACLK & INCLK two separate options at pin level.

    Yes, if you refer to the port pin functions, section 9.14 in the datasheet, it will show you which level and which PSEL bits to set/clr for each IO pin function.

    Bivin George said:
    2. Can i use any GPIO as input clock for timers in addition to TA1CLK, TA0CLK, & TB0CLK ?

    No, only those labeled as clock inputs

    Bivin George said:
    3. What is the purpose of TA1.0 TA1.1 TA1.2 pins

    These are the outputs for the 3 count/compare modules in the timer.  For example, PWM.

  • 0 in reply to Dennis Lehman
    Expert 1057 points

    Hi

    In API userguide, it is mentioned to select clock source as external clock , value to be selected is "Timer_A_Clocksource_external_TXCLK". But this will select, respective clock base, for example TA0CLK for timer A0 base initialization.

    How to choose INCLK as input clock (for example UCA1CLK) while using MSP430 API.

  • 0 in reply to Bivin George
    Guru 95495 points

    driverlib timer_a.h says:

    > #define TIMER_A_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK TASSEL__INCLK

    I see no INCLK option for the EUSCI-s. What is it you would like to accomplish?

  • 0 in reply to Bruce McKenney
    Expert 1057 points

    Hi

    Thanks for the reply.

    Yes, exactly i'm not able to find INCLK option in Driver library UG also.

    But it is mentioned in datasheet of MSP that INCLK option is available. So doubt was how this can be used and which pin of MSP430FR5043 corresponds to the same.

    Can you share documents related to INCLK input and how it is used in MSP430 ICs.

  • +1 in reply to Bivin George
    Guru 95495 points

    I don't have a copy of the driverlib UG, but most TI documents have a link at the bottom of each page which you can use to tell the writers about any discrepancies you see in the document. In the meantime I expect you can use the symbol I found.

    The datasheet(s) and the user guide(s) are the only documents I know of that discuss INCLK. INCLK usage varies by device. In your case [Ref datasheet (SLASEF5B) Tables 9-12 through 9-17] INCLK for each TAn is the inverse of TAnCLK -- a somewhat arcane usage, but I suppose there's an application for it. For a different device, INCLK may do something different (or maybe nothing at all).

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