Data Sheet
Table 18. Arduino Channel Connections
Arduino Connector ADC Channel MAX 10 ADC Name MAX10 Pin
ARDUINO_ANA0 (J6.1)
ADC1 Channel5
ADC1IN5
U3.C1
ARDUINO_ANA1 (J6.2)
ADC1 Channel0 (Dedicated
Channel)
ANAIN1
U3.D2
ARDUINO_ANA2 (J6.3)
ADC1 Channel1
ADC1IN1
U3.D1
ARDUINO_ANA3 (J6.4)
ADC1 Channel8
ADC1IN8
U3.E1
ARDUINO_ANA4 (J6.5)
ADC1 Channel7
ADC1IN7
U3.F1
ARDUINO_ANA5 (J6.6)
ADC1 Channel4
ADC1IN4
U3.E4
Intel Cyclone 10 LP FPGA device communicates with the ADC block in the Intel MAX 10
device on the board through the ADC I
2
C interface, which supports both 100 KHz and
400 KHz I
2
C clock frequency. The ADC output value is 12-bit data and I
2
C data is 8-
bit. Hence two register addresses are used to store 12-bit ADC output data. These
registers are all read only. The ADC I
2
C slave address of ADC block is 0x5E.
Table 19. Register Addresses for Arduino Channels
Arduino Connector Register Address
ARDUINO_ANA0 (J6.1) 0x31, 0x30
ARDUINO_ANA1 (J6.2) 0x27, 0x26
ARDUINO_ANA2 (J6.3) 0x29, 0x28
ARDUINO_ANA3 (J6.4) 0x37, 0x36
ARDUINO_ANA4 (J6.5) 0x35, 0x34
ARDUINO_ANA5 (J6.6) 0x2F, 0x2E
Use the formula to covert ADC output value to voltage:
Voltage = (ADC_Output_Value/4096) * VREF * R_Divider
•
ADC_Output_Value is the value in Decimal read from ADC I
2
C bus as described
above.
•
VREF is the MAX 10 ADC reference voltage. Use 3.3 V when using MAX 10 internal
reference source.
•
R_Divider
(2)
is a resistors divider value along with operational amplifier
MCP6242 in order to allow tolerance up to 5 V analog input. By default, it is 2.
For example, if you want to measure analog input value on ARDUINO_ANA0 (J6.1).
(2)
Different analog outputs on Arduino shield have different output impedance, these divider
resistor values may need to be adjusted based on your application.
4 Evaluation Board Components
UG-20082 | 2018.02.05
Intel
®
Cyclone
®
10 LP FPGA Evaluation Kit User Guide
30
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