MachXO5-NX Development Board
Evaluation Board User Guide
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FPGA-EB-02052-1.0
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Figure 8.4. Circuit Design for ADC1
Rotate the Trimmer clockwise to decrease the voltage, as shown in
. To increase the voltage to ADCP1, rotate
the POT counter-clockwise.
Decreasing
Wiper
Voltage
Wiper
CW
CCW
Clockwise
1
2
3
Figure 8.5. Trimmer Wiper Description
Optionally, both ADC pairs are also routed to PMOD like header J28. For their signal assignment, refer to
Table 8.15. J28 (DNI) Header Pin Connections
J28 Pin Number
Net Name
MachXO5-25 Ball Location
Application Notes
1
MDIR0
W1
Within IO Bank 7
2
MEN0
V5
Within IO Bank 7
3
ADCP0
Y16
Remove R168 for separation
4
ADCN0
Y17
Remove R169 for separation
5
GND
—
—
6
VCCIO7
—
1.8V/3.3V selectable
7
MDIR1
W2
Within IO Bank 7
8
MEN1
V6
Within IO Bank 7
9
ADCP1
Y18
Remove R82 for separation
10
ADCN1
Y19
Remove R80 for separation
11
GND
—
—
12
VCCIO7
—
1.8V/3.3V selectable