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DE10-Standard
User Manual
84
www.terasic.com
January 19, 2017
Figure 5-19 Block diagram of ADC reading
Figure 5-20
depicts the pin arrangement of the 2x5 header. This header is the input source of ADC
convertor in this demonstration. Users can connect a trimmer to the specified ADC channel
(ADC_IN0 ~ ADC_IN7) that provides voltage to the ADC convert. The FPGA will read the
associated register in the convertor via serial interface and translates it to voltage value to be
displayed on the Nios II console.
Figure 5-20 Pin distribution of the 2x5 Header for the ADC
The LTC2308 is a low noise, 500ksps, 8-channel, 12-bit ADC with an SPI/MICROWIRE
compatible serial interface. The internal conversion clock allows the external serial output data
clock (SCK) to operate at any frequency up to 40MHz.In this demonstration, we realized the SPI
protocol in Verilog, and packet it into Avalon MM slave IP so that it can be connected to Qsys.
Figure 5-21
is SPI timing specification of LTC2308.
Содержание DE10-Standard
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