4
LatticeECP3 Serial Protocol Board – Revision E
User’s Guide
LatticeECP3 Device
This board features a LatticeECP3 FPGA with a 1.2V core supply. It can accommodate all pin compatible
LatticeECP3 devices in the 1156-ball fpBGA (1mm pitch) package. A complete description of this device can be
found in the
LatticeECP3 Family Data Sheet
.
Note: The connections referenced in this document refer to the LFE3-95E-FF1156 device. Available I/Os and asso-
ciated sysIO™ banks may differ for other densities within this device family.
Applying Power to the Board
The LatticeECP3 Serial Protocol Board is ready to power on. The board can be supplied with power from an AC
wall-type transformer power supply shipped with the board. Or, it can be supplied from an benchtop supply via ter-
minal screw connections. It also has provisions to be supplied from the PCI Express edge fingers from a host
board.
To supply power from the factory-supplied wall transformer, simply connect the output connection of the power cord
to J1 and plug wall-transformer into an AC wall outlet.
Power Supplies
(see Appendix A, Figure 20)
The evaluation board incorporates an alternate scheme to provide power to the board. The board is equipped to
accept a main supply via the TB1 connection. This connection is provided to use with a benchtop supply adjusted
to provide a n12V DC. An indicator (D1) will illuminate when 12V is applied to the board.
All input power sources and on-board power supplies are fused with surface mounted fuses and have green LEDs
to indicate power GOOD status of the intermediate supplies.
Table 1. Board Power Supply Fuses and Indicators LEDs (see Appendix A, Figure 20)
Fuse
Designator
Function
Power Good
LED Designator
Function
F1
12V Input Supply Fuse
D1
12V Input Good Indicator
F2
1.5V Fuse
D6
1.5V Good Indicator
F3
1.2V Core Fuse
D3
1.2V Core Good Indicator
F4
3.3V Fuse
D4
3.3V Good Indicator
F5
1.8V Fuse
D7
1.8V Good Indicator
F6
1.2V Analog Supply
D2
1.2V VCCA Good Indicator
F7
2.5V Fuse
D5
2.5V Good Indicator
Power can be supplied with either a wall transformer pack, or another external source.
Table 2. External Board Supply Input Terminal (see Appendix A, Figure 20)
TB1
Screw terminal for 12V DC
Pin 1(square PCB pad) -> +12V DC
Pin 2 -> Ground
The above-mentioned supplies can be isolated from the on-board regulators by removal of the associated fuse.
Surface-mounted test loops are provided to apply alternative power sources to these supplies as required for test-
ing purposes.