MachXO5-NX Development Board
Evaluation Board User Guide
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FPGA-EB-02052-1.0
11
Table 2.1. Onboard Major Power Rails
Power Net Name
Primary Source
Test Point
+12V
DC Power Jack (J17)
TP20
PS_5V
DC/DC Regulator (U11 )
—
VBUS_5V
Mini-USB (J11)
—
+5.0V
Selected by Slide switch (SW6)
TP14
+3.3V
LDO (U8)
TP15
+1.2V
LDO (U16)
TP18
+2.5V
LDO (U13)
TP16
+1.8V
LDO (U15)
TP17
+2.8V
LDO (U20)
TP19
+1.0V
DC/DC Regulator (U12)
TP21
+3.3V_RASP
Raspberry Pi Header (J6)
—
+3.3V_AR
Arduino Header (J4)
—
, this board provides multiple power options for I/O bank voltage flexibility.
summarizes the VCCIO support matrix on this board. For an example, VCCIO0 and VCCIO2 share the same three
positions jumper J25 and short its Pin 1 and Pin 2 can bring the 3.3 V LDO output to both I/O bank 0 and bank 2. For
power consumption evaluation, this board facilitate some two-position jumpers with 1 Ω sense resistors to measure
the voltage drop on each power rail, then the supply current can be calculated.
Table 2.2. MachXO5-25 IO Bank Power Rails Stuff
MachXO5-25 Power (U3)
Jumpers
3.3V
2.5V
1.8V
1.2V
Ext 3.3V
Power Test
Point
Sense Resistor
of 1 Ω
VCCIO0
J25
Pin 1-2 Pin 2-3
—
—
—
JP19
R132
VCCIO1
—
Fixed
—
—
—
—
JP16
R133
VCCIO2
J25
Pin 1-2 Pin 2-3
—
—
—
JP20
R134
VCCIO3
J26
Pin 1-2
—
—
Pin 2-3
JP21
R235
VCCIO4
J29
—
Pin 1-2
—
Pin 2-3
—
JP22
R236
VCCIO5
J20
—
—
Pin 2-3
Pin 1-2
—
JP23
R237
VCCIO6
J21
—
—
Pin 2-3
Pin 1-2
—
JP24
R238
VCCIO7
J22
Pin 1-2
—
Pin 2-3
—
—
JP25
R239
VCCIO8
J23
Pin 1-2
—
—
—
Pin 2-3
JP26
R240
VCCIO9
—
—
—
Fixed
—
—
JP15
R138
Other than power rail for each I/O Bank, this board also provides some test points to evaluate the major power
consumptions for MachXO5-25 device.
Table 2.3. MachXO5-25 Major Power Rails Stuff
MachXO5-25 Power (U3)
Power Test Point
Voltage Drop Resistor
Resistance
VCC_CORE
JP18
R112
0.01
Ω
VCC_AUX/VCC_AUXH/VCCAUXA
JP14
R131
1
Ω
VCC_ADC
JP17
R137
1
Ω