Device Specifications

Microcontroller: Texas Instruments MSP430F5438AIPZR

• Power
  • 1.8V to 3.6V Supply Voltage
  • Up to 4.6mA needed
• Capabilities:
  • 16-bit architecture
  • 25MHz System Clock
• Notable Peripherals:
  • Up to 4 of:
    • UART/SPI
  • Up to 4 of:
    • I2C/SPI
  • 12-bit ADC
    • 14 external channels

Real-Time Clock/Calendar: Microchip Technology ‎MCP7940MT-I/SN

• Power
  • 1.8V to 5.5V Supply Voltage
  • 1.2uA typical timekeeping current required at 3.3V (This will be powered exclusively by a CR2032 battery)
• Notable Peripherals:
  • I2C
    • Slave only
    • Clock rate up to 400kHz

Bluetooth/Wi-Fi: Espressif Systems ESP32-WROVER-IE (8MB)

• Power
  • 3.0V to 3.6V Supply Voltage
  • Minimum 500mA needed up to 1.6A (500mA + 1100mA maximum cumulative IO output)
• Notable Peripherals:
  • I2C (2)
    • Master or Slave
    • 100kbit/s or 400kbit/s
    • 7-bit/10-bit addressing mode
  • SPI
    • SPI, HSPI and VSPI
    • Master or Slave
    • 1-line full-duplex and 1/2/4-line half-duplex
    • Up to 80MHz
    • Up to 64-byte FIFO
  • UART (3)
    • Up to 5Mbps

GPS Receiver: U-Blox NEO-M9N

• Power
  • 2.7V to 3.6V
  • 36mA typical will be likely usage
• Notable Peripherals:
  • SPI
    • Slave Only
    • 5.5MHz
  • UART
  • I2C (Also called Display Data Channel (DDC))
    • Slave Only
    • 400kHz

CANbus Controller: Microchip Technology MCP2515T-I/SO

• Power
  • 2.7V to 5.5V Supply Voltage
  • 5mA typical in active mode; 1uA typical in sleep mode
• Notable Peripherals:
  • SPI
    • Slave (Assuming only option)
    • 10MHz

CANbus Transceiver: ‎Texas Instruments SN65HVD234D

• Power
  • 3V to 3.6V Supply Voltage
  • 6mA typical maximum; 200uA typical in standby
• Used directly with CANbus Controller

SD Card (Generic)

• Power
  • 2.7V to 3.6V Supply Voltage
• Notable Peripherals:
  • SPI

USB to UART Bridge: Future Technology Devices International FT230XS-R

• Power
  • 3V to 5V Supply Voltage
  • 8.3mA maximum usage in normal operation (This chip will be exclusively powered an external host device)
• Notable Peripherals:
  • UART

RS-232 Transceiver: Maxim Integrated MAX3232EUE+

• Power
  • 3V to 5.5V Supply Voltage
  • Estimating 0.3mA typical average usage
• Will use UART from the MCU

Inertial Measurement Unit: TDK InvenSense ICM-20948

• Power
  • 1.71V to 3.6V Supply Voltage
  • 3mA typical usage in full 9-Axis mode; 8uA typical in "Full-Chip Sleep Mode"
• VDDIO Voltage input also needed from 1.71V to 1.95V
• Notable Peripherals:
  • I2C
    • Slave only
    • 400kHz
  • SPI
    • Slave only
    • 7MHz