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TPS65910: Backup data

Hayashi
Expert 1840 points
Part Number: TPS65910
Hi teams,
My customer wants to know about backup data.
TheTPS65910 datasheet describe that Backup Registers.
Does it include the TC register?
I think that the backup data is follows:
• The internal 32-kHz oscillator
• Backup registers
I think this isn't include the RC register.
Is this the correct?
Best regards
Hayashi
  • 0
    TI__Genius 9380 points
    Hayashi,
    I have forwarded your question to our product specialist. You should receive a response soon.
    Thank you for using E2E.
  • 0
    TI__Mastermind 30280 points

    Hayashi,

    The backup registers are documented in section 6.12 Functional Registers starting on page 58 of the datasheet: BCK1_REG through BCK5_REG (address offsets 0x17-0x1B).

    Tables 6-23 through 6-28 on pages 67 & 68 explain that these registers are Read/Write and do not have any contents by default (reset to 0x00 when VRTC is removed) in detail and can be found by searching the key words "backup register" in the PDF version of the TPS65910 datasheet.

    The purpose of these registers is left up to you, the designer of the application. You can store up to 5 bytes of any data you need to recall when the host processor is completely powered-down and the volatile memory is cleared.

    The quote from the datasheet that you are referring to is in section 6.6 Backup Battery Management on page 55:

    "The back-up domain functions which are always supplied from VRTC comprehend:

    • The internal 32-kHz oscillator

    • Backup registers"

    This means that the backup battery (a coin cell battery, for example) continues to provide power to the internal oscillator and continues to hold the data stored in the backup registers when no other power supply is available.

    Thanks & Best Regards,

    Brian