rp2040_pac::rosc

Module ctrl

source
Expand description

Ring Oscillator control

Structs§

Enums§

  • ENABLE_A
    On power-up this field is initialised to ENABLE
    The system clock must be switched to another source before setting this field to DISABLE otherwise the chip will lock up
    The 12-bit code is intended to give some protection against accidental writes. An invalid setting will enable the oscillator.
  • FREQ_RANGE_A
    Controls the number of delay stages in the ROSC ring
    LOW uses stages 0 to 7
    MEDIUM uses stages 0 to 5
    HIGH uses stages 0 to 3
    TOOHIGH uses stages 0 to 1 and should not be used because its frequency exceeds design specifications
    The clock output will not glitch when changing the range up one step at a time
    The clock output will glitch when changing the range down
    Note: the values here are gray coded which is why HIGH comes before TOOHIGH

Type Aliases§

  • ENABLE_R
    Field ENABLE reader - On power-up this field is initialised to ENABLE
    The system clock must be switched to another source before setting this field to DISABLE otherwise the chip will lock up
    The 12-bit code is intended to give some protection against accidental writes. An invalid setting will enable the oscillator.
  • ENABLE_W
    Field ENABLE writer - On power-up this field is initialised to ENABLE
    The system clock must be switched to another source before setting this field to DISABLE otherwise the chip will lock up
    The 12-bit code is intended to give some protection against accidental writes. An invalid setting will enable the oscillator.
  • FREQ_RANGE_R
    Field FREQ_RANGE reader - Controls the number of delay stages in the ROSC ring
    LOW uses stages 0 to 7
    MEDIUM uses stages 0 to 5
    HIGH uses stages 0 to 3
    TOOHIGH uses stages 0 to 1 and should not be used because its frequency exceeds design specifications
    The clock output will not glitch when changing the range up one step at a time
    The clock output will glitch when changing the range down
    Note: the values here are gray coded which is why HIGH comes before TOOHIGH
  • FREQ_RANGE_W
    Field FREQ_RANGE writer - Controls the number of delay stages in the ROSC ring
    LOW uses stages 0 to 7
    MEDIUM uses stages 0 to 5
    HIGH uses stages 0 to 3
    TOOHIGH uses stages 0 to 1 and should not be used because its frequency exceeds design specifications
    The clock output will not glitch when changing the range up one step at a time
    The clock output will glitch when changing the range down
    Note: the values here are gray coded which is why HIGH comes before TOOHIGH
  • R
    Register CTRL reader
  • W
    Register CTRL writer