T-Core
User Manual
34
January 14, 2020
Figure 3-7 External RGB LED connection diagram
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This demonstration shows how to use the FPGA on-die ADC to measure the input power voltage
from the eight analog input pins among the ADC connector. The measured voltage is displayed on
the Signal Tap.
shows the block diagram of this demonstration. The main control uses
the Intel ADC IP to retrieve the 12-bit digitalized analog value according the channel specified by
the SWITCH on the T-Core board. The input voltage can be calculated based on the 12-bit digital
value. Finally, the voltage value will be displayed on the Signal Tap Logic Analyzer.
The 12-bit represents 0~2.5V input voltage to the ADC hardware. The input voltage to the ADC
analog input can be calculated with the formula listed below:
Voltage input= (12-bit integer value)/4096 x 2.5