Lattice Semiconductor MachXO5-NX Development Kit, User Manual

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MachXO5-NX Development Board
Preliminary Evaluation Board User Guide
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FPGA-EB-02052-0.90 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) —
As shown in Figure 2.1 , this board provides multiple power options for I/O bank voltage flexibility. Table 2.2
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