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====== RP2040 ======

[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pfa| technical spec]]

pin function select table
[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pfed| 1]]
[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pfee| 2]]
[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pfef| 3]]

===== Memory Map =====
[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf19| Memory Map]]

^ start address ^ end address ^  used for ^  comment ^
| 0x00 00 00 00 | | **ROM** | |
| 0x10 00 00 00 | | **XIP** | eXecute In Place |
| 0x11 00 00 00 | | XIP no alloc | |
| 0x12 00 00 00 | | XIP no cache | |
| 0x13 00 00 00 | | XIP no cache + no alloc | |
| 0x14 00 00 00 | | XIP CTRL | |
| 0x15 00 00 00 | 0x15 00 40 00 | XIP SRAM | |
| 0x18 00 00 00 | | XIP SSI | |
| 0x20 00 00 00 | | **SRAM** | |
| 0x20 00 00 00 | 0x20 04 00 00 | SRAM striped | SRAM 0 -3 |
| 0x20 04 00 00 | | SRAM 4 | |
| 0x20 04 10 00 | 0x20 04 20 00 | SRAM5 | |
| 0x21 00 00 00 | | SRAM 0 | not striped |
| 0x21 01 00 00 | | SRAM 1 | not striped |
| 0x21 02 00 00 | | SRAM 2 | not striped |
| 0x21 03 00 00 | | SRAM 3 | not striped |
| 0x40 00 00 00 | | **APB Peripherals** | |
| 0x40 00 00 00 | | SYSINFO | |
| 0x40 00 40 00 | | SYSCFG | |
| 0x40 00 80 00 | | CLOCKS | |
| 0x40 00 c0 00 | | RESETS | |
| 0x40 01 00 00 | | PSM | |
| 0x40 01 40 00 | | IO BANK0 | |
| 0x40 01 80 00 | | IO QSPI | |
| 0x40 01 c0 00 | | PADS BANK0 | |
| 0x40 02 00 00 | | PADS QSPI | |
| 0x40 02 40 00 | | XOSC | |
| 0x40 02 80 00 | | PLL_SYS | |
| 0x40 02 c0 00 | | PLL USB | |
| 0x40 03 00 00 | | BUSCTRL | |
| 0x40 03 40 00 | | UART 0 | |
| 0x40 03 80 00 | | UART 1 | |
| 0x40 03 c0 00 | | SPI 0 | |
| 0x40 04 00 00 | | SPI 1 | |
| 0x40 04 40 00 | | I2C 0 | |
| 0x40 04 80 00 | | I2C 1 | |
| 0x40 04 c0 00 | | ADC | |
| 0x40 05 00 00 | | PWM | |
| 0x40 05 40 00 | | TIMER | |
| 0x40 05 80 00 | | WATCHDOG | |
| 0x40 05 c0 00 | | RTC | |
| 0x40 06 00 00 | | ROSC | |
| 0x40 06 40 00 | | Vreg and Chip Reset | |
| 0x40 06 80 00 | | | |
| 0x40 06 c0 00 | | TBMAN | | 
| 0x50 00 00 00 | | **AHB-Lite Peripherals** | |
| 0x50 00 00 00 | | DMA | |
| 0x50 10 00 00 | | USB CTRL | |
| 0x50 10 00 00 | | USB CTRL DPRAM | |
| 0x50 11 00 00 | | USB CTRL REGS | |
| 0x50 20 00 00 | | PIO 0 | |
| 0x50 30 00 00 | | PIO 1 | |
| 0x50 40 00 00 | | XIP AUX | |
| 0xd0 00 00 00 | | **IOPORT Registers** | |
| 0xd0 00 00 00 | | SIO | |
| 0xe0 00 00 00 | | **Cortex-M0+** | |
| 0xe0 00 00 00 | | PPB | |



===== Peripherals =====


==== Clocks ====

ROSC : Ring Oscillator (1.8 - 12 MHz


clk_ref = reference clock
clk_sys = sytem clock (max 133 MHz
clk_peri
clk_usb = 48 MHz
clk_adc = 48 MHz
clk_rtc = 46875 Hz


==== UART ====

clocked by clk_peri. UARTCLK = clk_peri, PCLK = clk_sys

32xFIFO

maximum Baudrate = UARTCLK/16 ( 125MHz -> 7.8 MBit/s)

^ Baudrate ^ factor ^ BRDI ^ BRDF  ^ m ^ error ^
| 115200@125MHz | 67.817 | 67 | 0.817 | 52 | 0.006% |


==== GPIO ====

Desciption [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pfec| GPIO ]], [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf1c| SIO ]]

IO_BANK0 : [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pff4| Register]]


IO_QSPI: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf120| Register]] 


PADS_BANK0: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf12b| Register]] 


PADS_QSPI: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf12e| Register]] 


SIO: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf2b| Register]] 


=== Function select ===
^ \ ^ F0 ^ F1 ^ F2  ^ F3 ^ F4 ^ F5 ^ F6 ^ F7  ^ F8 ^ F9 ^ F10-31 ^
| GPIO  0 |  | SPI0 RX  | UART0 TX  | I2C0 SDA | PWM0 A | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO  1 |  | SPI0 CSn | UART0 RX  | I2C0 SCL | PWM0 B | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO  2 |  | SPI0 SCK | UART0 CTS | I2C1 SDA | PWM1 A | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO  3 |  | SPI0 TX  | UART0 RTS | I2C1 SCL | PWM1 B | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO  4 |  | SPI0 RX  | UART1 TX  | I2C0 SDA | PWM2 A | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO  5 |  | SPI0 CSn | UART1 RX  | I2C0 SCL | PWM2 B | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO  6 |  | SPI0 SCK | UART1 CTS | I2C1 SDA | PWM3 A | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO  7 |  | SPI0 TX  | UART1 RTS | I2C1 SCL | PWM3 B | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO  8 |  | SPI1 RX  | UART1 TX  | I2C0 SDA | PWM4 A | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO  9 |  | SPI1 CSn | UART1 RX  | I2C0 SCL | PWM4 B | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO 10 |  | SPI1 SCK | UART1 CTS | I2C1 SDA | PWM5 A | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO 11 |  | SPI1 TX  | UART1 RTS | I2C1 SCL | PWM5 B | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO 12 |  | SPI1 RX  | UART0 TX  | I2C0 SDA | PWM6 A | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO 13 |  | SPI1 CSn | UART0 RX  | I2C0 SCL | PWM6 B | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO 14 |  | SPI1 SCK | UART0 CTS | I2C1 SDA | PWM7 A | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO 15 |  | SPI1 TX  | UART0 RTS | I2C1 SCL | PWM7 B | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO 16 |  | SPI0 RX  | UART0 TX  | I2C0 SDA | PWM0 A | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO 17 |  | SPI0 CSn | UART0 RX  | I2C0 SCL | PWM0 B | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO 18 |  | SPI0 SCK | UART0 CTS | I2C1 SDA | PWM1 A | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO 19 |  | SPI0 TX  | UART0 RTS | I2C1 SCL | PWM1 B | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO 20 |  | SPI0 RX  | UART1 TX  | I2C0 SDA | PWM2 A | SIO | PIO0 | PIO1 | CLOCK GPIN0  | USB VBUS EN   |  |
| GPIO 21 |  | SPI0 CSn | UART1 RX  | I2C0 SCL | PWM2 B | SIO | PIO0 | PIO1 | CLOCK GPOUT0 | USB OVCUR DET |  |
| GPIO 22 |  | SPI0 SCK | UART1 CTS | I2C1 SDA | PWM3 A | SIO | PIO0 | PIO1 | CLOCK GPIN1  | USB VBUS DET  |  |
| GPIO 23 |  | SPI0 TX  | UART1 RTS | I2C1 SCL | PWM3 B | SIO | PIO0 | PIO1 | CLOCK GPOUT1 | USB VBUS EN   |  |
| GPIO 24 |  | SPI1 RX  | UART1 TX  | I2C0 SDA | PWM4 A | SIO | PIO0 | PIO1 | CLOCK GPOUT2 | USB OVCUR DET |  |
| GPIO 25 |  | SPI1 CSn | UART1 RX  | I2C0 SCL | PWM4 B | SIO | PIO0 | PIO1 | CLOCK GPOUT3 | USB VBUS DET  |  |
| GPIO 26 |  | SPI1 SCK | UART1 CTS | I2C1 SDA | PWM5 A | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| GPIO 27 |  | SPI1 TX  | UART1 RTS | I2C1 SCL | PWM5 B | SIO | PIO0 | PIO1 |              | USB OVCUR DET |  |
| GPIO 28 |  | SPI1 RX  | UART0 TX  | I2C0 SDA | PWM6 A | SIO | PIO0 | PIO1 |              | USB VBUS DET  |  |
| GPIO 29 |  | SPI1 CSn | UART0 RX  | I2C0 SCL | PWM6 B | SIO | PIO0 | PIO1 |              | USB VBUS EN   |  |
| QSPI_SCK | XIP SCK |  |  |  |  | SIO |  |  |  |  |  |
| QSPI_CSn | XIP CSn |  |  |  |  | SIO |  |  |  |  |  |
| QSPI_SD0 | XIP SD0 |  |  |  |  | SIO |  |  |  |  |  |
| QSPI_SD1 | XIP SD1 |  |  |  |  | SIO |  |  |  |  |  |
| QSPI_SD2 | XIP SD2 |  |  |  |  | SIO |  |  |  |  |  |
| QSPI_SD3 | XIP SD3 |  |  |  |  | SIO |  |  |  |  |  |

==== QSPI ====

SSI: 
[[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf23a| Description]] 

XIP_SSI: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf259| Register]] 

XIP_CTRL: [[https://nomagic.de/datasheet/raspberrypi/rp2040/rp2040-datasheet.html#pf80| Register]] 

^ FRF ^ description ^
| 00b | Motorola Serial Peripheral Protocol (SPI) |
| 01b | Texas Instruments Serial Protocol (SSP) |
| 10b | Nationa Semiconductor Microwire |
| 11b | reserved |


=== clock ===
pclk and sclk are driven from clk_sys

=== modifications ===

ss_in_n is tied high

The following modifications were made to the Synopsys DW_apb_ssi hardware:

  - XIP accesses are byte-swapped, such that the least-addressed byte is in the least-significant position 
**Note**: this only applies to XIP accesses (RP2040 system addresses in
the range 0x10000000 to 0x13ffffff), not to direct access to the DW_apb_ssi FIFOs. 
  - When SPI_CTRLR0_INST_L is 0, the XIP instruction field is appended to the end of the address for XIP accesses, rather than prepended to the beginning
  - The reset value of DMARDLR is increased from 0 to 4. The SSI to DMA handshaking on RP2040 requests only single transfers or bursts of four, depending on whether the RX FIFO level has reached DMARDLR, so DMARDLR should not be changed from this value.
===== abbreviation dictionary =====

^ abbreviation ^ long version ^ comment ^
| FRF | frame format | |
| ROSC | Ring Oscillator | |
| SPI | Motorola Serial Peripheral Interface | |
| SSI | Synchronous Serial Interface | XIP QSPI peripheral |
| SSP | Texas Instruments Serial Protocol | |
| XIP | EXecute In Place | |