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MachXO Starter Evaluation Board
Lattice Semiconductor
User’s Guide
Figure 1. MachXO Starter Outline
Resources relating to the Lattice MachXO Starter Evaluation Board, including user documentation updates and
sample programs, can be found at www.latticesemi.com/boards. Click on the appropriate link for the Lattice
MachXO Starter Evaluation Board.
Lattice MachXO Device
The MachXO Starter Evaluation Board features a Lattice MachXO device with a 3.3V DC core. The board is popu-
lated with a MachXO256 device in a plastic 100-pin TQFP package. The MachXO Starter Evaluation Board allows
for density migration to other Lattice MachXO densities in the 100 TQFP package, with either 3.3V or 1.2V cores. A
complete description of this device can be found in the Lattice MachXO Family Data Sheet on the Lattice web site
at www.latticesemi.com.
Device Core and I/O Voltage
Core Voltage
The MachXO is available with either 3.3V or 1.2V core voltage devices. Boards populated with a 3.3V DC core
device will allow operation of the core between 1.8V and 3.3V DC. The core voltage is fixed at 3.3V during manu-
facturing. The core voltage may be changed from the fixed 3.3V rail to the adjustable voltage rail by changing the 0
ohm resistor at R157 to R158.
Boards populated with a 1.2V core device operate at 1.2V only, with the core voltage supply fixed at 1.2V during
manufacturing. Refer to the board silkscreen outline in the appendix for component location.
Prototype
Area
MachXO I/O Access
MachXO I/O
Access
MachXO I/O
Access
Expansion
Header
Expansion
Header
3.3V LDO
1.2V LDO
Adjustable
LDO
33MHz
Oscillator
Switches
JTAG
Interface
DC Input
LED Bank
DIP
Switch
