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RTC_A and RTC_D on a CC430

Daniel Berenguer
Expert 2185 points
Other Parts Discussed in Thread: CC430F5137, CC430F5147

I want to use the RTC_D module on a CC430F5137 since I want the MCU to stay in LPM3 mode and wake up periodically to run some tasks. How can I tell the MCU that I want the RTC_D module and not RTC_A? Both modules share common registers and, since ACLK is connected to the external 32.768 KHz, I see no way to make the difference.

Thanks.

  • 0
    Guru 92251 points

    Daniel Berenguer said:
    I want to use the RTC_D module on a CC430F5137 since I want the MCU to stay in LPM3 mode and wake up periodically to run some tasks. How can I tell the MCU that I want the RTC_D module and not RTC_A?

    The CC430F5137 has only a RTC_A module, as shown by the datasheet CC430F5137 SLAS554G.

    The CC430 Family User's Guide SLAU259E describes both the RTC_A and RTC_D since the User's Guide also applies to other familty members such as the CC430F5147 which have the RTC_D rather than RTC_A module.

  • 0 in reply to Chester Gillon
    Expert 2185 points

    That's right. I don't know why I thought that RTC_D was available across the whole family of wireless MCU's.

    Thanks!

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