SLAA559E April   2014  – November 2016 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2013-EP , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2254 , MSP430F2272 , MSP430F2274 , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430FR5847 , MSP430FR58471 , MSP430FR5848 , MSP430FR5849 , MSP430FR5857 , MSP430FR5858 , MSP430FR5859 , MSP430FR5867 , MSP430FR58671 , MSP430FR5868 , MSP430FR5869 , MSP430FR5870 , MSP430FR5872 , MSP430FR58721 , MSP430FR5887 , MSP430FR5888 , MSP430FR5889 , MSP430FR58891 , MSP430FR5922 , MSP430FR59221 , MSP430FR5947 , MSP430FR59471 , MSP430FR5948 , MSP430FR5949 , MSP430FR5957 , MSP430FR5958 , MSP430FR5959 , MSP430FR5967 , MSP430FR5968 , MSP430FR5969 , MSP430FR59691 , MSP430FR5970 , MSP430FR5972 , MSP430FR59721 , MSP430FR5986 , MSP430FR5987 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR59891 , MSP430FR5994 , MSP430FR6820 , MSP430FR6822 , MSP430FR68221 , MSP430FR6870 , MSP430FR6872 , MSP430FR68721 , MSP430FR6877 , MSP430FR6879 , MSP430FR68791 , MSP430FR6887 , MSP430FR6888 , MSP430FR6889 , MSP430FR68891 , MSP430FR6920 , MSP430FR6922 , MSP430FR69221 , MSP430FR6927 , MSP430FR69271 , MSP430FR6928 , MSP430FR6970 , MSP430FR6972 , MSP430FR69721 , MSP430FR6977 , MSP430FR6979 , MSP430FR69791 , MSP430FR6987 , MSP430FR6988 , MSP430FR6989 , MSP430FR69891 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2553

 

  1.   Migrating from the MSP430F2xx and MSP430G2xx Families to the MSP430FR58xx/FR59xx/68xx/69xx Family
    1.     Trademarks
    2. 1 Introduction
    3. 2 In-System Programming of Nonvolatile Memory
      1. 2.1 Ferroelectric RAM (FRAM) Overview
      2. 2.2 FRAM Cell
      3. 2.3 Protecting FRAM Using the Memory Protection Unit
        1. 2.3.1 Dynamically Partitioning FRAM
      4. 2.4 FRAM Memory Wait States
      5. 2.5 Bootloader (BSL)
      6. 2.6 JTAG and Security
      7. 2.7 Production Programming
    4. 3 Hardware Migration Considerations
    5. 4 Device Calibration Information
    6. 5 Important Device Specifications
    7. 6 Core Architecture Considerations
      1. 6.1 Power Management Module (PMM)
      2. 6.2 Clock System
      3. 6.3 Operating Modes, Wakeup, and Reset
      4. 6.4 Determining the Cause of Reset
      5. 6.5 Interrupt Vectors
      6. 6.6 FRAM and the FRAM Controller
        1. 6.6.1 Flash and FRAM Overview Comparison
        2. 6.6.2 Cache Architecture
      7. 6.7 RAM Controller (RAMCTL)
    8. 7 Peripheral Considerations
      1. 7.1 Watchdog Timer
      2. 7.2 Ports
        1. 7.2.1 Digital Input/Output
        2. 7.2.2 Capacitive Touch I/O
      3. 7.3 Analog-to-Digital Converters
        1. 7.3.1 ADC12 to ADC12_B
        2. 7.3.2 ADC10 to ADC12_B
      4. 7.4 REF_A Module
      5. 7.5 Comparator_A to Comparator_E
      6. 7.6 Hardware Multiplier (HWMPY32)
      7. 7.7 DMA Controller
      8. 7.8 Low-Energy Accelerator (LEA) for Signal Processing
      9. 7.9 Communication Modules
        1. 7.9.1 USI to eUSCI
        2. 7.9.2 USCI to eUSCI
    9. 8 Conclusion
    10. 9 References
  2.   Revision History

7.8 Low-Energy Accelerator (LEA) for Signal Processing

The LEA module is a hardware engine designed for operations that involve vector-based arithmetic and signal processing for the MSP430FR599x MCUs. Compared to using the CPU for these operations, the LEA module offers up to 19 times faster performance and up to 20 times less energy consumption when performing vector-based digital signal processing computations such as FIR or IIR filtering, correlation, and FFT calculations. The LEA module requires MCLK to be operational; therefore, the LEA module is enabled in active mode or LPM0. When the LEA module is used, data operations are performed and shared on 4KB of SRAM. The MSP CPU and the LEA module can run simultaneously and independently unless they access the same system RAM.

The LEA operations are abstracted within the Digital Signal Processing (DSP) Library for MSP MCUs for ease-of-use. DSP Library functions can be used on any MSP device; however, if the LEA module is available on the device, DSP Library automatically uses the LEA module for vector math operations.

Before using the DSP Library APIs, first specify the input and output memory locations by allocating an array in which the locations need to reside within the shared 4KB of LEA SRAM memory. For example, to perform 256-point complex FFT with the LEA module, the data input array consists of 256-word real and 256-word complex values which totals to 512 words (1024 bytes).

For more information on the LEA module, see the following links:
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