1.4 KiB
1.4 KiB
@page designChoices Design Choices
JTAG Interface
When connecting the MCU to the programmer via the JTAG interface, it is possible for a local power supply connected to the MCU to be used or for power from the debugging/programming adapter to be used. Since having power supplied to the MCU from the debugging/programming adapter can be useful for use outside of the Sunseeker vehicle, we chose to use that.
Microcontroller Peripheral Connections
Universal Serial Communication Interfaces (USCIs):
- A - Supporting up to four total of UART and/or SPI
- A0 [SPI]:
- CANbus Controller 0 (Microchip Technology MCP2515T-I/SO)
- CANbus Controller 1 (Microchip Technology MCP2515T-I/SO)
- A1:
- A2 [UART]:
- RS-232 Transceiver (STMicroelectronics ST232CDR)
- A3 [UART]:
- USB to UART Bridge (Future Technology Devices International FT230XS-R)
- A0 [SPI]:
- B - Supporting up to four total of I2C and/or SPI
- B0 [SPI]:
- SD Card
- GPS Receiver (Maxim Integrated MAX2771ETI+T)
- B1 [SPI]:
- Bluetooth/Wi-Fi (Espressif Systems ESP32-WROVER-IE (8MB))
- B2 [I2C]:
- Inertial Measurement Unit (TDK InvenSense ICM-20600)
- Real-Time Clock/Calendar (Microchip Technology MCP7940MT-I/SN)
- B0 [SPI]:
The thinking behind this so far, is to try and balance the load between the modules with SPI protocol being used in more high data-rate peripherals and I2C used with lower or less-used peripherals.