SLAA361A July   2007  – August 2018 MSP430F169 , MSP430F169 , MSP430FG4618 , MSP430FG4618

 

  1.   Speech and Sound Compression and Decompression With MSP430™ MCUs
    1.     Trademarks
    2. 1 Introduction
    3. 2 Compression and Decompression Algorithms
      1. 2.1 Differential Pulse Code Modulation (DPCM)
      2. 2.2 Adaptive Differential Pulse Code Modulation (ADPCM)
    4. 3 Signal Chain on Chip in MSP430 MCUs
      1. 3.1 MSP430F169 Signal-Chain-on-Chip Solution
      2. 3.2 MSP430FG4618 Signal-Chain-on-Chip Solution
    5. 4 Performance on the MSP430 MCUs
      1. 4.1 Using the Associated Code
    6. 5 References
  2.   Revision History

3.1 MSP430F169 Signal-Chain-on-Chip Solution

The MSP430F169 has an integrated 12-bit SAR ADC, a hardware multiplier module that allows efficient realization of digital filters, and an integrated 12-bit DAC module. Figure 4 shows a signal chain circuit in the MSP430F169.

signal-chain-on-chip-solution-with-msp430f169.gifFigure 4. Signal-Chain-on-Chip Solution With MSP430F169

This configuration also works with an external serial flash memory, which could be used for storage of the audio data. It is possible to connect an external flash memory through the I2C or SPI interface of the MSP430 MCU. The CPU loading could be greatly reduced by using the MSP430F169 DMA module for automatic transfers of received data to RAM.