Week 06 - Embedded programming¶
Group assignment :
- browse through the data sheet for your microcontroller
- compare the performance and development workflows for other architectures
Comparing Micro-controller¶
We chose to make a table to compare 2 micro-controller chips using datasheets and vendor documentations :
| Feature | RP2040 | ESP32 - S3 | Renesas RA4M1 |
|---|---|---|---|
| Processor | Dual-Core ARM Cortex MO+ | Xtensa Dual-core 32bits LX7 | Renesas RA4M1 |
| Clock speed | 133 Mhz | 2.4 GHz | 48 MHz |
| Memory | 264kb SRAM & 2MB Flash | 512Kb SRAM & 384 Kb ROM | 32 kB RAM & 256 kB Flash |
| GPIO pins | 30 | 30 | 14 |
| Serial Interface | Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT | ADC, I2C, I2S, SDIO, SPI, PWM, UART | UART, I2C, SPI, CAN, DAC, PWM |
| Analog inputs | 4 | 20 | 6 |
| Connectivity | None | Bluetooth 4.2 & WiFi 802.11b/g/n | None |
| Cost | 70ct | 1.85$ | 6.60$ |
| Size | 7x7 mmm | 5x5 mm | 16x16 mm |
Here’s a representation of the I/O pins for each chips :
Our boards use XIAO RP2040 which is a micro-controller board using the RP2040 chip. The functionalities are slightly different such as an USB-C connector for programming and power supply.