Module rp2040_pac::rosc

ROSC

Modules

• ctrl
  Ring Oscillator control
• div
  Controls the output divider
• dormant
  Ring Oscillator pause control
  This is used to save power by pausing the ROSC
  On power-up this field is initialised to WAKE
  An invalid write will also select WAKE
  Warning: setup the irq before selecting dormant mode
• freqa
  The FREQA & FREQB registers control the frequency by controlling the drive strength of each stage
  The drive strength has 4 levels determined by the number of bits set
  Increasing the number of bits set increases the drive strength and increases the oscillation frequency
  0 bits set is the default drive strength
  1 bit set doubles the drive strength
  2 bits set triples drive strength
  3 bits set quadruples drive strength
• freqb
  For a detailed description see freqa register
• phase
  Controls the phase shifted output
• randombit
  This just reads the state of the oscillator output so randomness is compromised if the ring oscillator is stopped or run at a harmonic of the bus frequency
• status
  Ring Oscillator Status

Structs

• RegisterBlock
  Register block

Type Aliases

• CTRL
  CTRL (rw) register accessor: Ring Oscillator control
• DIV
  DIV (rw) register accessor: Controls the output divider
• DORMANT
  DORMANT (rw) register accessor: Ring Oscillator pause control
  This is used to save power by pausing the ROSC
  On power-up this field is initialised to WAKE
  An invalid write will also select WAKE
  Warning: setup the irq before selecting dormant mode
• FREQA
  FREQA (rw) register accessor: The FREQA & FREQB registers control the frequency by controlling the drive strength of each stage
  The drive strength has 4 levels determined by the number of bits set
  Increasing the number of bits set increases the drive strength and increases the oscillation frequency
  0 bits set is the default drive strength
  1 bit set doubles the drive strength
  2 bits set triples drive strength
  3 bits set quadruples drive strength
• FREQB
  FREQB (rw) register accessor: For a detailed description see freqa register
• PHASE
  PHASE (rw) register accessor: Controls the phase shifted output
• RANDOMBIT
  RANDOMBIT (r) register accessor: This just reads the state of the oscillator output so randomness is compromised if the ring oscillator is stopped or run at a harmonic of the bus frequency
• STATUS
  STATUS (r) register accessor: Ring Oscillator Status