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
RP2040-E2
Reference
RP2040-E2
Summary
USB device endpoint abort is not cleared.
Description
The USB device controller (Section 4.1) has the ability to abort any pending transactions on an endpoint
by setting that endpoint’s bit in the EP_ABORT register. Due to a logic error, the USB device controller will
reply with NAKs forever on all endpoints if a transaction is initiated for any endpoint with the EP_ABORT
bit set.
Workaround
Do not use the EP_ABORT bits.
Affects
RP2040B0, RP2040B1
Fixed by
Not fixed, do not use
RP2040-E3
Reference
RP2040-E3
Summary
USB host: interrupt endpoint buffer done flag can be set with incorrect buffer select.
Description
The USB host has two types of transactions: normal software initiated transfer, and interrupt transfers,
where the host polls an interrupt endpoint after a specific amount of time. For example, polling a mouse
every 1ms to check for movement. Interrupt transfer are single buffered, but the controller doesn’t reset
the buffer selector to zero. This means that if a software initiated transfer happened then the interrupt
transfer can potentially raise the buffer done flag with BUF1 selected instead of BUF0. The fix is to ignore the
BUFF_CPU_SHOULD_HANDLE register for interrupt endpoints.
Workaround
Affects
RP2040B0, RP2040B1
Fixed by
Software
RP2040-E4
Reference
RP2040-E4
Summary
USB host writes to upper half of buffer status in single buffered mode.
Description
The USB host maintains a buffer selector which switches between BUF0 and BUF1. This should only be
toggled in double buffered mode but is toggled in single buffered mode too. For a transaction lasting
multiple packets (i.e. length more than 8 bytes in low speed mode, and length more than 64 bytes in full
speed mode), the buffer status can be written back to the BUF1 half of the status register when the buffer
select is incorrectly set to BUF1. Note this does not affect reading new buffer information from the buffer
control register, as the controller ignores the buffer selector in single buffered mode when reading the
buffer control register.
Workaround
Shift endpoint control register to the right by 16 bits if the buffer selector is BUF1. You can use
BUFF_CPU_SHOULD_HANDLE find the value of the buffer selector when the buffer was marked as done.
Affects
RP2040B0, RP2040B1
Fixed by
Software
RP2040 Datasheet
USB 643