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CC1110 Real Time clock Power PIn

Rod Sugiyama
Prodigy 10 points

I'm wondering if the DC power to the real time clock and 32kHz oscillator is connected to pins separate from the processor and peripheral DC power?  I'm energy harvesting and would like to power the RTC from the harvester in sleep mode and on wake up.  But, not have to add a switch to power the MPU and RF. 

Thanks

  • 0
    TI__Mastermind 36375 points

    Rod,

    No, but in PM2 everything is off except the low power RC or XTAL oscillator along with required BOR circuits and in this mode the chip consumes 0.5uA typical (data sheet page 11)

    Here is a excerpt from the data sheet page 77.

    "PM2 has the second lowest power consumption. In PM2, the power-on reset, external interrupts, the low power RC oscillator

    or the 32.768 kHz crystal oscillator and Sleep Timer peripherals are active. I/O pins retain the I/O mode and output value set before entering

    PM2. The content of RAM and most registers is preserved in this mode (see Table 31, Table 32, and Table 33). All other internal circuits are

    powered down. When PM2 is entered, a power down sequence is run.

    PM2 is typically entered when using the Sleep Timer as the wakeup event. Please see Section 12.8.1 for minimum sleep time when

    using the Sleep Timer"

    Regards,
    /TA