I want to generate a signal with a sample-rate of 100khz, since the highest frequency of this signal is about 45khz. Since the UC3A has only the ABDAC as DAC I have to use this peripheral. But I'm unsure about the timing resp. the clock settings. The UC3A is running at 66Mhz (12Mhz ext). According the datasheet I need a generic clock for the ABDAC that is 256 times the sample frequency. This means 256*100khz = 25.6Mhz. But how can I generate this frequency for the ABDAC?
Thanks and best regard, Christoph
Focouzee
Posted: Jun 21, 2012 - 11:14 AM
Joined: Dec 28, 2011
Posts: 16
Location: Germany
Hi Christoph,
a sample rate of 100kHz is ambitious for the ABDAC. See AT32UC3A-series Manual (document 32058K-AVR32-01/12).
Quote:
Features
• 16-bit Stereo Audio Bitstream
– Sample Rate Up to 50 KHz
Looks to be a challenge for an overclocking freek.
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