Module rp2040_pac::rosc::ctrl

Ring Oscillator control

Structs

• CTRL_SPEC
  Ring Oscillator control

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