LFE2-20E-5FN256I Lattice, LFE2-20E-5FN256I Datasheet - Page 558

• Manufacturer Part Number: LFE2-20E-5FN256I
• Description: IC FPGA 21KLUTS 193I/O 256FPBGA
• Manufacturer: Lattice
• Series: ECP2r

Specifications of LFE2-20E-5FN256I

• Number Of Logic Elements/cells: 21000
• Number Of Labs/clbs: 2625
• Total Ram Bits: 282624
• Number Of I /o: 193
• Number Of Gates: -
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 256-BGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 220-1170; LFE2-20E-5FN256I; Q6411457

Lattice Semiconductor
DCS Usage with Verilog - Example
module dcs(clk0,clk1,sel,dcsout);
input clk0, clk1, sel;
output dcsout;
DCS DCSInst0 (.SEL(sel),.CLK0(clk0),.CLK1(clk1),.DCSOUT(dcsout));
defparam DCSInst0.DCSMODE = "CLK0";
endmodule
Oscillator (OSCD)
There is a dedicated oscillator in the LatticeECP2/M devices whose output is made available for users. The oscilla-
tor frequency is programmable with a range of 2.5 to 130MHz. The output of the oscillator can also be routed as an
input clock to the clock tree. The oscillator frequency output can be further divided by internal logic (user logic) for
lower frequencies, if desired. The oscillator is powered down when not in use. The output of this oscillator is not a
precision clock. It is intended for use as an extra clock that does not require accurate clocking.
Library Element Name: OSCD
Table 10-16. OSCD Port Definition
Table 10-17. OSCD Attribute Definition
Please refer to the
OSC Library Symbol (OSCD)
Figure 10-29. OCS Symbol
Nominal Frequency
User Attribute
LatticeECP2/M Family Data Sheet
Attribute Name
NOM_FREQ
Output
I/O
2.5, 4.3, 5.4, 6.9, 8.1, 9.2, 10.0, 13.0, 15.0, 20.0, 26.0, 30.0, 34.0, 41.0,
45.0, 55.0, 60.0, 130.0
Name
OSCD
OSC
for detailed specifications.
10-34
CFGCLK
Value (MHz)
Oscillator Clock Output
Description
LatticeECP2/M sysCLOCK PLL/DLL
Design and Usage Guide
Default
Value
2.5