Cypress S6J3200 Series, Manual

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CHAPTER 34:Sound System Configuration
1298 S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
1.
Overview
The sound system is defined as the function group of following modules.
Function Group Function Module
Input module
DMAC
Sound waveform generator (SWFG)
Sound mixer Sound mixer (SMIX)
Output module
Audio DAC (DAC)
PCM-PWM
I2S
Here the configuration procedure and notes are described in this chapter for each applied scope when
the modules are used as the sound system.
See the dedicated chapter that describes in detailed each module composing the sound system before
referring this chapter.
1.1.
Input Module
There are 2 types of sound sources.
One is a sound source that is generated by the sound waveform generator (SWFG). SWFG with easy
configurations by software can generate 16bit sound sources of PCM format, and output it as 32bit
monaural source.
The other is a sound source that is in internal or external storage. DMAC or CPU can transfer sound
source in the embedded Flash memory or data RAM, or comes from external memory via communication
interface such as I2S.
1.2.
Sound Mixer
The sound mixer (SMIX) synthesizes inputted sound sources by saturation calculation, and performs
various effects of sound volume (configured volume, mute effect, fade-in, or fade out) automatically by
hardware operation.
1.3.
Output Module
The mixed sound source is outputted out of microcontroller.
Audio DAC converts PCM sound source to level of analog voltage. It enables to mount analog amplifier
directly at analog output port of MCU.
PCM-PWM converts PCM sound source to PWM (Pulse Width Modulation) waveform and outputs it.
Through a kind of Integral circuit it can be converted to level of analog voltage.
I2S (Inter IC Sound) is a serial interface protocol. The sound system has its transfer facility as sound
system function.
These 3 functions are exclusively used for the output module of the sound system.