OCG-D R1.0 battery back Clock

Home › Forums › MultiConnect OCG › OCG-D R1.0 battery back Clock

Tagged: 

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • October 2, 2014 at 1:50 pm #6035
    Alan Tilley
    Participant

    Does the battery backed up clock have any associated ram available the could be used for temporary storage incase of power failure?

    October 6, 2014 at 12:58 pm #6040
    Bryan Tran
    Moderator

    Hi Alan,

    There are 4 32 bit General Purpose Registers in the AT91SAM9G20 that are powered by the battery. I think the Linux RTC code uses one of these registers to store a time offset for the RTC. Otherwise they may be available. The memory locations are FFFFD50-FFFFD60. The documentation calls them General Purpose Back-up Registers (GPBR).

    Regards,

    BT

  • Author
    Posts
Viewing 2 posts - 1 through 2 (of 2 total)
  • You must be logged in to reply to this topic.