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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
@@ Line 1: / Line 1: @@
-===== Raspberry Pi Edge Class Devices Hardware Review =====
+====== Raspberry Pi Edge Class Devices Hardware Review ======
+{{:en:iot-open:czapka_b.png?50| General audience classification icon }}{{:en:iot-open:czapka_e.png?50| General audience classification icon }}\\
 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, I/O, voltage regulator and ROM in a single enclosure.\\
 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) and third-party development boards.
+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) as chips to be soldered; thus, third-party development boards are available in the market.
+A genuine RPi Pico W development board is present in the figure {{ref>rpipicow}}.\\
+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:hardware2:raspberrypi:rpipicow.jpg?400 | Rapsberry Pi Pico W development board}}
+<caption>Rapsberry Pi Pico W development board</caption>
+</figure>
-==== 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, USB mass storage UF2 support and utility libraries such as FPU implementation.
+== 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/outputs,
+    * 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, including:
-    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/transmitter
-    Timer – timer/counter unit
-    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), ensuring flexible use of units. Peripherals have input signals Task that trigger their operation and output signals Event, which inform of some situation. These signals can be connected, creating hardware dependencies between units, making it possible to synchronise the operation of peripherals without the need for processor use. Some units can be handled with an internal DMA mechanism (EasyDMA) that supports data transmission between peripherals and memory without code execution. To enable safe wireless transmission, some cryptographic hardware units are included:
-    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's root of trust (RoT) and cryptographic services.
-Hardware summary
-<todo @pczekalski> RP2040 description </todo>

en/iot-open/hardware2/raspberrypi/edgeclassfamily.1699379888.txt.gz · Last modified: 2023/11/07 17:58 by pczekalski