SLVA275C january   2010  – may 2023 UCD9081

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Hardware
    1. 2.1 Package: RHB (S-PQFP-N32), 32-Pin Plastic Quad Flatpack
    2. 2.2 Hardware and Pinout
    3. 2.3 Detailed Pin Descriptions
      1. 2.3.1 RST
      2. 2.3.2 SDA
      3. 2.3.3 SCL
      4. 2.3.4 ADDRx
      5. 2.3.5 ROSC
  5. 3Software
    1. 3.1 Data File Format
    2. 3.2 I2C Transactions
    3. 3.3 Device Version
    4. 3.4 Checksum
    5. 3.5 Sample Configuration Data File
      1. 3.5.1 Factory Default
      2. 3.5.2 EVM Default Configuration
    6. 3.6 I2C Write and Read Transaction Formats
      1. 3.6.1 I2C Write Transaction
      2. 3.6.2 I2C Read Transaction
    7. 3.7 Pseudo I2C Write and Read Transactions
      1. 3.7.1 UCD9081 I2C Transactions for Writing User Data and PARAMS
      2. 3.7.2 UCD9081 I2C Transactions for Reading User Data and PARAMS
  6. 4User Configuration
    1. 4.1 Configuration Parameter Memory Map
    2. 4.2 Configuration Parameter Detail
      1. 4.2.1  GpDir
      2. 4.2.2  NegateEnablePolarity
      3. 4.2.3  SeqEventPending
      4. 4.2.4  SequenceEventParameters
      5. 4.2.5  SequenceEventLink
      6. 4.2.6  SequenceEventData
      7. 4.2.7  DependencyMasks
      8. 4.2.8  UnderVoltageThresholds
      9. 4.2.9  OverVoltageThresholds
      10. 4.2.10 RampTime
      11. 4.2.11 OutOfRegulationWidth
      12. 4.2.12 UnsequenceTime
      13. 4.2.13 EnablePolarity
      14. 4.2.14 SaveRailLog
      15. 4.2.15 ReferenceSelect
      16. 4.2.16 LastUnusedSeq
      17. 4.2.17 IgnoreGlitchAlarms
      18. 4.2.18 IgnoreFlashErrorLog
      19. 4.2.19 Checksum
  7. 5Additional Considerations
    1. 5.1 Embedded Application
    2. 5.2 Timing
      1. 5.2.1 UCD9081 Startup
      2. 5.2.2 Clock Stretching After Flash Erase
      3. 5.2.3 Bit Timeout
      4. 5.2.4 Byte or Transaction Timeout
  8. 6References
  9. 7Revision History

4.2.7 DependencyMasks

The DependencyMasks field in the configuration parameters defines the rail dependency masks used for rail and GPO shutdown. This mask represents the set of other rails and GPOs that must be shut down when this rail shuts down. Note that because only rails are monitored, the table only has entries for the shutdown of rails. In the dependency mask itself, there are bits that allow for GPO shutdown.

The address map for these registers is as follows:

AddressSizeDefault ValueDescription
0xE10020x007FDependency mask for rail 1
0xE10220x0001Dependency mask for rail 2
0xE10420x0002Dependency mask for rail 3
0xE10620x0004Dependency mask for rail 4
0xE10820x0008Dependency mask for rail 5
0xE10A20x0010Dependency mask for rail 6
0xE10C20x0020Dependency mask for rail 7
0xE10E20x0040Dependency mask for rail 8

The format for each register is as follows:

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