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

2.3 Operating Frequency and Supply Voltage

For the MSP430™ MCUs, the maximum frequency at which the CPU can operate depends on the supply voltage. This specification can be found in the recommended operating conditions of each device-specific data sheet. In general, it can be said that this specification differs for the F13x/F14x and F23x/F24x families of microcontrollers. However, an F23x/F24x MCU can always operate under the same operating conditions in terms of supply voltage and CPU clock frequency (MCLK) as an F13x/F14x MCU. If a designer who migrates an existing design to an F23x/F24x MCU wants to take advantage of the increased maximum clock frequency, it is important to closely review the recommended operating conditions in the F23x/F24x MCU data sheet. [4]

It is of extreme importance that this relationship is also observed during power-ramp scenarios. Violating this maximum frequency and voltage dependency can result in unpredictable code execution. Note that F23x/F24x MCUs have a built-in SVS module that can ensure that this operating condition is not violated.