SLAA380B December   2007  – September 2018 MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619

 

  1.   Migrating From MSP430F16x MCUs to MSP430F261x MCUs
    1.     Trademarks
    2. 1 Comparison of MSP430F1xx and MSP430F2xx Families
    3. 2 Hardware Considerations for MSP430F16x to MSP430F261x 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 MSP430F16x to MSP430F261x Migration – Firmware Considerations
      1. 3.1 CPU and Memory Considerations
        1. 3.1.1 Extended Memory Architecture
        2. 3.1.2 Subroutine Parameter Passing and Stack Frame
        3. 3.1.3 MSP430X Instruction Cycle Count Optimizations
        4. 3.1.4 Device Memory Map
        5. 3.1.5 Information Flash Memory
      2. 3.2 Serial Communication – USART Versus USCI
        1. 3.2.1 UART Mode
        2. 3.2.2 SPI Mode
        3. 3.2.3 I2C 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
      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 MSP430F16x and MSP430F261x family of microcontrollers. An MSP430F261x device can always operate under the same operating conditions in terms of supply voltage and CPU clock frequency (MCLK) as an MSP430F16x device. However, if a designer who migrates an existing design to an MSP430F261x device wants to take advantage of the increased maximum clock frequency, it is important to closely review the recommended operating conditions in the MSP430F261x device 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 both MSP430F16x and MSP430F261x MCUs have a built-in SVS module that can be used to ensure that this operating condition is not violated.