Locating Signals
DAC Input, Parallel
Board label.
DAC_IN0: DAC_IN7
Connector grid location.
F1, F2
Description.
These are the 8-bit parallel output signals of the port expander in the middle of the mixed signal chain. The sine
wave data from the SPI bus is converted to 8 parallel bits to drive the DAC. DAC IN0 is the LSB. (See Figure 2.)
See the previous SPI Bus description for packet details.
DAC Output
Board label.
DAC_OUT
Connector grid location.
I2
Description.
This is the output of the DAC at the end of the mixed signal chain. The DAC is driven from the port expander. The
DAC output is a sine wave. Since the output is not
fi
ltered, the digitizing levels are obvious in the output waveform. (See Figure 2.)
The resulting DAC voltage is a sine wave with an amplitude 0 to 3 volts, and a period of 310 ms.
I2S (Inter-IC Sound) Bus
Board label.
I2S_SCK, I2S_WS, I2S_SD
Connector grid location.
G2, G7, H7, I6
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Demo 2 Board Instruction Manual
Summary of Contents for DPO2000 Series
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