LFEC10E-3F256C Lattice Semiconductor Corp., LFEC10E-3F256C Datasheet - Page 16

• Manufacturer Part Number: LFEC10E-3F256C
• Description: Latticeecp/ec Family of Fpga Devices Has Been Optimized to Deliver Mainstream Fpga Features at Low Cost.for Maximum Performance And Value, The Latticeecp (EConomy Plus) Fpga Concept Combines an Efficient Fpgafabric With High-speed Dedicated Functions
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Figure 2-5. Distributed Memory Primatives
ROM Mode: The ROM mode uses the same principal as the RAM modes, but without the Write port. Pre-loading is
accomplished through the programming interface during configuration.
PFU Modes of Operation
Slices can be combined within a PFU to form larger functions. Table 2-4 tabulates these modes and documents the
functionality possible at the PFU level.
Table 2-4. PFU Modes of Operation
Routing
There are many resources provided in the LatticeECP/EC devices to route signals individually or as busses with
related control signals. The routing resources consist of switching circuitry, buffers and metal interconnect (routing)
segments.
1. These modes are not available in PFF blocks
MUX 16x1 x 1
MUX 2x1 x 8
MUX 4x1 x 4
MUX 8x1 x 2
LUT 6x 2 or
LUT 4x8 or
LUT 5x4 or
LUT 7x1 or
WRE
Logic
AD0
AD1
AD2
AD3
AD0
AD1
AD2
AD3
DI0
DI1
CK
ROM16x1
SPR16x2
2-bit Counter x 4
2-bit Comp x 4
2-bit Add x 4
2-bit Sub x 4
Ripple
DO0
DO0
DO1
2-6
DPR16x2 x 2
DPR16x4 x 1
SPR16x2 x 4
SPR16x4 x 2
SPR16x8 x 1
WAD0
WAD1
WAD2
WAD3
WCK
WRE
RAM
DI0
DI1
1
LatticeECP/EC Family Data Sheet
DPR16x2
ROM16x1 x 8
ROM16x2 x 4
ROM16x4 x 2
ROM16x8 x 1
ROM
RAD0
RAD1
RAD2
RAD3
RDO0
RDO1
WDO0
WDO1
Architecture