CHAPTER 26:PCMPWM
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S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
1.
Overview
The PCMPWM module converts Pulse Code Modulated (PCM) data samples to Pulse Width Modulated
(PWM) signals. The intended purpose of the module is to provide simple audio output capabilities.
Also refer to the chapter of "Sound System Configuration" how to configure the PCMPWM.
Features of the PCMPWM
Two separate channels for stereo audio output
Optional mono audio output mode
A maximum output resolution of 16 bits
An output resolution of 12 bits at a sampling frequency of 24.4 kHz (at 100 MHz PWM clock)
An output resolution of 11 bits at s sampling frequency of 48.8 kHz (at 100 MHz PWM clock)
Three modes of operation for different speaker interfacing:
−
Low-pass filter output mode
−
Simplified H-bridge output mode
−
Full H-bridge output mode
Support for the DMA transfer of PCM data samples using DMA block transfer mode
FIFO input buffer for PCM samples, with a depth 24
Programmable clock divider for PWM cycle time
Optional output of silence signals in debug mode and normal mode
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