SLAAED8A October   2024  – July 2026 TAC5111 , TAC5112 , TAC5211 , TAC5212 , TAC5412-Q1 , TAD5112 , TAD5212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Signal Generator 1 (SG1) – “Beep” Generator
    1. 2.1 Signal Generator 1 Amplitude and Output Channels
    2. 2.2 Signal Generator 1 Frequency
    3. 2.3 Beep Generator Example – Using TAC5212EVM-K and I2C Configuration
  6. 3Signal Generator 2 (SG2) – “Chirp” Generator
    1. 3.1 Signal Generator 2 Amplitude and Output Channels
    2. 3.2 Signal Generator 2 Start and Stop Frequency
    3. 3.3 ADSR Envelope Parameters
      1. 3.3.1 Attack/Decay Timers
      2. 3.3.2 Release Timer
      3. 3.3.3 Powerup Delay Timer
      4. 3.3.4 Sustain/Restart Timers
      5. 3.3.5 Sustain Level
    4. 3.4 Signal Generator 2 Output Modes
      1. 3.4.1 Manual Mode
        1. 3.4.1.1 Manual Mode Example I2C Configuration using TAC5212EVM-K
      2. 3.4.2 Continuous Pulse Mode
        1. 3.4.2.1 Continuous-Pulse Mode Example I2C Configuration using TAC5212EVM-K
      3. 3.4.3 One Shot Mode
        1. 3.4.3.1 One-Shot Mode Example I2C Configuration using TAC5212EVM-K
  7. 4Summary
  8. 5References
  9. 6Revision History

3.4.1 Manual Mode

In manual mode, the device generates a single pulse whenever the user enables the ADSR note bit. Hence, the typical sequence followed is:

  1. Set ADSR note to 0x0000000 at the beginning of the configuration to initiate an acknowledge.
  2. Once DAC is powered up, set ADSR note to 0x00000001 to enable a chirp pulse.
  3. The signal is running until the ADSR note is set again to 0x00000000.

Since the pulse start/stop is manual, sustain/restart timer and powerup delay timer configurations are not applicable in manual mode. These registers need to be set to 0xFFFFFFFF.

If the signal is kept running until the frequency exceeds fs/2, aliasing will happen as mentioned in Signal Generator 2 Start and Stop Frequency.