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

3.1.2 Information Flash Memory

Both F13x/F14x and F23x/F24x MCUs have 256 bytes of information flash memory located in the memory range of 0x1000 to 0x10FF. While the total memory size is the same, the memory is organized differently. The F13x/F14x MCU information memory consists of two flash segments (INFOA and INFOB) that are 128 bytes each, and the F23x/F24x MCUs have four segments (INFOA, INFOB, INFOC, and INFOD) that are 64 bytes each.

Applications storing data in the information memory need to consider the different segment sizes. Each information flash memory segment must be erased individually, resulting in four write accesses on an F23x/F24x instead of two on the F13x/F14x. Also, the F23x/F24x INFOA segment is protected by a lock feature and requires special treatment to be erased or written to. However, in general, it is not recommended to erase INFOA or store any user data in it. INFOA comes with factory-provided device-specific calibration data, such as calibration to generate specific frequencies using the DCO. Chances are that an application can benefit from those constants.

See the MSP430x2xx Family User’s Guide for more details on the organization of the 2xx information flash memory, the INFOA lock feature, and the factory-provided calibration constants.