MSP430F2122IRHBR datasheet by Texas Instruments

MSP430F2122IRHBR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the internal oscillator?
  The maximum clock frequency that can be used with the internal oscillator is 16 MHz. However, it's recommended to use a clock frequency of 12 MHz or less to ensure reliable operation.
• How do I configure the MSP430F2122IRHBR for low-power operation?
  To configure the MSP430F2122IRHBR for low-power operation, you can use the Power Management Module (PMM) to select the lowest possible clock frequency, disable unused peripherals, and use the Low Power Mode 3 (LPM3) or Low Power Mode 4 (LPM4) modes. You can also use the Dynamic Voltage Scaling (DVS) feature to reduce the voltage supply to the core and peripherals.
• What is the maximum current that can be sourced or sunk by the GPIO pins?
  The maximum current that can be sourced or sunk by the GPIO pins is 4 mA. However, it's recommended to limit the current to 2 mA or less to ensure reliable operation and prevent damage to the device.
• How do I use the Universal Serial Communication Interface (USCI) module for UART, SPI, or I2C communication?
  The USCI module can be configured for UART, SPI, or I2C communication by setting the appropriate control registers and using the corresponding protocol-specific registers. For example, to use the USCI module for UART communication, you would set the UCMODE register to 0x00, configure the baud rate using the UCBRx register, and use the UCTXBUF and URXBUF registers to transmit and receive data.
• What is the purpose of the JTAG fuse and how do I use it?
  The JTAG fuse is a one-time programmable (OTP) fuse that can be used to permanently disable the JTAG interface. This can be useful for securing the device and preventing unauthorized access. To use the JTAG fuse, you would need to program the fuse using a JTAG programmer or debugger, and then set the JTAG fuse bit in the SYSRSTIV register.