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en:iot-open:hardware2:raspberrypi:edgeclassfamily [2023/11/07 17:58] – [CPU] pczekalski | en:iot-open:hardware2:raspberrypi:edgeclassfamily [2023/11/23 10:36] (current) – pczekalski | ||
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- | ===== Raspberry Pi Edge Class Devices Hardware Review ===== | + | ====== Raspberry Pi Edge Class Devices Hardware Review ====== |
+ | {{: | ||
The Raspberry Pi Pico is the MCU development board that uses the chip RP2040, designed by Raspberry Pi in 2019. | The Raspberry Pi Pico is the MCU development board that uses the chip RP2040, designed by Raspberry Pi in 2019. | ||
- | ==== Hardware | + | == Hardware == |
It is intended as a low-cost, low-power device with big computational possibilities and connectivity features. This device is intended to work with constrained power sources, mainly battery-powered. The MCU integrates all features, including 6 banks of RAM, an interrupt controller, DMA, timers, oscillators, | It is intended as a low-cost, low-power device with big computational possibilities and connectivity features. This device is intended to work with constrained power sources, mainly battery-powered. The MCU integrates all features, including 6 banks of RAM, an interrupt controller, DMA, timers, oscillators, | ||
A compact, 7x7mm chip exposes 26 GPIOs and is one of the most affordable MCUs, estimated at 4 USD/piece only. | A compact, 7x7mm chip exposes 26 GPIOs and is one of the most affordable MCUs, estimated at 4 USD/piece only. | ||
- | Currently, there are 2 types of development boards available: Raspberry Pi Pico and Raspberry Pico W. The last one provides wireless connectivity. It is also possible to have just MCUs (RP2040) | + | Currently, there are 2 types of development boards available: Raspberry Pi Pico and Raspberry Pico W. The last one provides wireless connectivity. It is also possible to have just MCUs (RP2040) |
+ | A genuine RPi Pico W development board is present in the figure {{ref> | ||
+ | With a built-in voltage regulator, the input voltage range is wide and starts from 1.8V up to 5.5V. | ||
- | ==== CPU ==== | + | <figure rpipicow> |
- | The CPU is an ARM Cortex-M0+ (double core) running up to 133 MHz (scalable). It supports DMA. There is no FPU, however. | + | {{ :en:iot-open: |
+ | < | ||
+ | </ | ||
- | ==== Memory ==== | + | == CPU == |
- | RPI Picos have 264kB of internal RAM, 2MB of built-in QSPI flash with the capability for an extension with external one up to 16MB | + | The CPU is an ARM Cortex-M0+ (double core) running up to 133 MHz (scalable). It supports DMA. There is no FPU, however. A Nested Vector Interrupt Controller is also present, along with a 24-bit timer. CPU and NIC can be put into the very low power mode. |
- | ==== Networking ==== | + | == Memory |
+ | RPI Picos have 264kB of internal RAM (SRAM) and 2MB of built-in QSPI flash with the capability for an extension with external one up to 16MB. RAM uses DMA to perform CPU-less transfers.\\ | ||
+ | There is a 16kB ROM that contains bootloaders, | ||
+ | == Networking == | ||
+ | Only the Pico W series includes a built-in radio that is 802.11n (2.4 GHz WiFi) and Bluetooth 5.2.\\ IoT-specific protocols are supported only with external modules. | ||
- | ==== Peripherals ==== | + | == Peripherals == |
+ | The Pico MCU includes a rich set of peripheral interfaces: | ||
+ | * 26 multipurpose GPIO inputs/ | ||
+ | * 2xUART, | ||
+ | * 2xSPI, | ||
+ | * 2xI2C, | ||
+ | * 15 PWM channels, | ||
+ | * 4xADC 12-bit (500ksps) converters where only 3 are usable, with a temperature sensor (for compensation), | ||
+ | * 8 programmable state machines, | ||
+ | * USB 1.1 controller (PHY) with HOST and DEV. | ||
- | The nRF SoCs are equipped with a rich set of peripherals, | ||
- | |||
- | GPIO – General Purpose Input Output lines | ||
- | TWI – Two Wire interface that can work in both master or slave mode | ||
- | SPI – Serial Peripheral Interface working in master or slave mode | ||
- | UART – Universal asynchronous receiver/ | ||
- | Timer – timer/ | ||
- | RTC – Real-time counter | ||
- | WDT – Watchdog timer | ||
- | |||
- | In selected models, additional units are available: | ||
- | |||
- | QSPI – Quad SPI and high-speed SPI in some versions | ||
- | I2S – Inter-IC sound interface | ||
- | USB – Universal serial bus device | ||
- | PDM – Pulse Density Modulation (PDM) | ||
- | PWM – Pulse Width Modulation | ||
- | COMP – Analog comparator with low power version LPCOMP | ||
- | SAADC – Successive approximation analog-to-digital converter | ||
- | |||
- | All peripherals are connected to the processor via PPI (Programmable Peripheral Interconnect), | ||
- | |||
- | RNG – Random Number Generator | ||
- | ACL – Access contol list | ||
- | AAR – Accelerated address resolver | ||
- | CCM – Cipher block chaining - message authentication code | ||
- | ECB – AES electronic codebook | ||
- | Cryptocell | ||
- | |||
- | The Cryptocell is a particular security subsystem developed by ARM®, which provides a device' | ||
- | Hardware summary | ||
- | |||
- | |||
- | <todo @pczekalski> |