5
DAC
5.1 DAC introduction
The chip has a built-in 10bits digital-to-analog converter (DAC) with a FIFO depth of 1, and supports 2 DAC modulation
outputs. Can be used for audio playback, conventional analog signal modulation.
5.2 DAC main feature
• DAC modulation accuracy is 10bits
• DAC input clock can be selected as 32M or Audio PLL
• Support DMA to transfer memory to DAC modulation register
• Support dual channel playback DMA transport mode
• The output pin of DAC is fixed to ChannelA as GPIO11, ChannelB as GPIO17
• DAC reference voltage can be selected internally
5.3 DAC function description
The basic block diagram of the DAC module is shown in the figure.
BL702/704/706 Reference Manual
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