LFE2-20E-5FN256I Lattice, LFE2-20E-5FN256I Datasheet - Page 519

• 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

LatticeECP2/M sysIO
Lattice Semiconductor
Usage Guide
Appendix B. sysIO Attributes Using the ispLEVER Design Planner User
Interface
Designers can assign sysIO buffer attributes using the Design Planner Spreadsheet View GUI available in the isp-
LEVER design tool. If you are using Lattice Diamond™ design software, refer to Appendix D. The Pin Attribute
Sheet list all the ports in a design and all the available sysIO attributes as preferences. By clicking on each of these
cells, a list of all the valid I/O preference for that port is displayed. Each column takes precedence over the next.
Therefore, when a particular IO_TYPE is chosen, the DRIVE, PULLMODE and SLEWRATE columns will only list
the valid combinations for that IO_TYPE. The pin locations can be locked using the pin location column of the Pin
Attribute sheet. Right-clicking on a cell will list the available pin locations. The Preference Editor will also conduct a
DRC check to search for any incorrect pin assignments.
Designers can enter DIN/DOUT preferences using the Cell Attributes sheet of the Preference Editor. All the prefer-
ences assigned using the Preference Editor are written into the preference file (.prf).
Figures 2 and 3 show the Pin Attribute sheet and the Cell Attribute sheet views of the preference editor. For further
information on how to use the Preference Editor, refer to the ispLEVER Help documentation in the Help menu
option of the software.
Figure 9-3. Pin Attributes Tab
Figure 9-4. Cell Attributes Tab
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