Datasheet
Table Of Contents
- RP2040 Datasheet
- Colophon
- Chapter 1. Introduction
- Chapter 2. System Description
- 2.1. Bus Fabric
- 2.2. Address Map
- 2.3. Processor subsystem
- 2.4. Cortex-M0+
- 2.5. DMA
- 2.6. Memory
- 2.7. Boot Sequence
- 2.8. Bootrom
- 2.9. Power Supplies
- 2.10. Core Supply Regulator
- 2.11. Power Control
- 2.12. Chip-Level Reset
- 2.13. Power-On State Machine
- 2.14. Subsystem Resets
- 2.15. Clocks
- 2.16. Crystal Oscillator (XOSC)
- 2.17. Ring Oscillator (ROSC)
- 2.18. PLL
- 2.19. GPIO
- 2.20. Sysinfo
- 2.21. Syscfg
- 2.22. TBMAN
- Chapter 3. PIO
- Chapter 4. Peripherals
- 4.1. USB
- 4.2. UART
- 4.3. I2C
- 4.3.1. Features
- 4.3.2. IP Configuration
- 4.3.3. I2C Overview
- 4.3.4. I2C Terminology
- 4.3.5. I2C Behaviour
- 4.3.6. I2C Protocols
- 4.3.7. Tx FIFO Management and START, STOP and RESTART Generation
- 4.3.8. Multiple Master Arbitration
- 4.3.9. Clock Synchronization
- 4.3.10. Operation Modes
- 4.3.11. Spike Suppression
- 4.3.12. Fast Mode Plus Operation
- 4.3.13. Bus Clear Feature
- 4.3.14. IC_CLK Frequency Configuration
- 4.3.15. DMA Controller Interface
- 4.3.16. Operation of Interrupt Registers
- 4.3.17. List of Registers
- 4.4. SPI
- 4.5. PWM
- 4.6. Timer
- 4.7. Watchdog
- 4.8. RTC
- 4.9. ADC and Temperature Sensor
- 4.10. SSI
- 4.10.1. Overview
- 4.10.2. Features
- 4.10.3. IP Modifications
- 4.10.4. Clock Ratios
- 4.10.5. Transmit and Receive FIFO Buffers
- 4.10.6. 32-Bit Frame Size Support
- 4.10.7. SSI Interrupts
- 4.10.8. Transfer Modes
- 4.10.9. Operation Modes
- 4.10.10. Partner Connection Interfaces
- 4.10.11. DMA Controller Interface
- 4.10.12. APB Interface
- 4.10.13. List of Registers
- Chapter 5. Electrical and Mechanical
- Appendix A: Register Field Types
- Appendix B: Errata
- Appendix C: Documentation Release History
0x10 N/A N/A deprecated
Do not use this function
0x14 N/A N/A deprecated
Do not use this function
0x18 63 63 float _fsqrt(float v)
Return or -Infinity if v is negative. (Note V1 returns +Infinity in this case)
0x1c 37 40 int _float2int(float v)
Convert a float to a signed integer, rounding towards -Infinity, and clamping the
result to lie within the range -0x80000000 to 0x7FFFFFFF
0x20 36 39 int _float2fix(float v, int n)
Convert a float to a signed fixed point integer representation where n specifies the
position of the binary point in the resulting fixed point representation - e.g.
_float2fix(0.5f, 16) == 0x8000. This method rounds towards -Infinity, and clamps
the resulting integer to lie within the range -0x80000000 to 0x7FFFFFFF
0x24 38 39 uint _float2uint(float v)
Convert a float to an unsigned integer, rounding towards -Infinity, and clamping
the result to lie within the range 0x00000000 to 0xFFFFFFFF
0x28 38 38 uint _float2ufix(float v, int n)
Convert a float to an unsigned fixed point integer representation where n specifies
the position of the binary point in the resulting fixed point representation, e.g.
_float2ufix(0.5f, 16) == 0x8000. This method rounds towards -Infinity, and clamps
the resulting integer to lie within the range 0x00000000 to 0xFFFFFFFF
0x2c 55 55 float _int2float(int v)
Convert a signed integer to the nearest float value, rounding to even on tie
0x30 53 53 float _fix2float(int32_t v, int n)
Convert a signed fixed point integer representation to the nearest float value,
rounding to even on tie. n specifies the position of the binary point in fixed point,
so
0x34 54 54 float _uint2float(uint32_t v)
Convert an unsigned integer to the nearest float value, rounding to even on tie
0x38 52 52 float _ufix2float(uint32_t v, int n)
Convert an unsigned fixed point integer representation to the nearest float value,
rounding to even on tie. n specifies the position of the binary point in fixed point,
so
0x3c 603 587 float _fcos(float angle)
Return the cosine of angle. angle is in radians, and must be in the range -128 to
128
RP2040 Datasheet
2.8. Bootrom 165