SLAA381C December   2007  – September 2018 MSP430F233 , MSP430F235 , MSP430F2410 , MSP430F247 , MSP430F248 , MSP430F249

 

  1.   Migrating From MSP430F13x and MSP430F14x MCUs to MSP430F23x and MSP430F24x MCUs
    1.     Trademarks
    2. 1 Comparison of MSP430F1xx and MSP430F2xx Families
    3. 2 Hardware Considerations for F13x/F14x to F23x/F24x Migration
      1. 2.1 Device Package and Pinout
      2. 2.2 Current Consumption
      3. 2.3 Operating Frequency and Supply Voltage
      4. 2.4 Device Errata
    4. 3 Firmware Considerations for F13x/F14x to F23x/F24x Migration
      1. 3.1 Memory Considerations
        1. 3.1.1 Device Memory Map
        2. 3.1.2 Information Flash Memory
      2. 3.2 Serial Communication – USART and USCI
        1. 3.2.1 UART Mode
        2. 3.2.2 SPI Mode
      3. 3.3 Clock System
        1. 3.3.1 LFXT1 and XT2 Oscillators
        2. 3.3.2 Digitally Controlled Oscillator (DCO)
      4. 3.4 Bootloader (BSL)
      5. 3.5 Interrupt Vectors
      6. 3.6 Beware of Reserved Bits!
      7. 3.7 Timers
      8. 3.8 Analog Comparator
    5. 4 References
  2.   Revision History

2.2 Current Consumption

When migrating to an F23x/F24x MCU, the difference in current consumption of the devices should be considered. For example, in LFXT1 standby mode (LPM3 using a 32-kHz watch crystal), the standby current consumption of an F23x/F24x MCU is in the 1-µA range (typical data sheet value at 3 V, 25°C), which is much lower than the current consumption of an F13x/F14x MCU, which is in the 1.6-µA range when performing the same function. This is a great benefit for applications that operate in standby mode most of the time. The active current consumption is comparable when operating at the same frequency, temperature, and voltage conditions. See the device-specific data sheets for the exact specifications.

When using LFXT1 in high-frequency mode or when using XT2, the current consumption of the oscillator on an F23x/F24x MCU is slightly higher than for an F13x/F14x MCU, due to differences in the oscillator design to support higher frequencies.

When taking advantage of the increased maximum operating frequency the F23x/F24x offers, additional current must be supplied by the system power supply, because active-mode current consumption scales linearly with operating frequency.