LFEC10E-3F256C Lattice Semiconductor Corp., LFEC10E-3F256C Datasheet - Page 116

• 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
Each EBR block consists of 9,216 bits of RAM. The values for x (for Address) and y (Data) for each EBR block for
the devices are included in Table 8-5.
Table 8-5. True Dual Port Memory Sizes for 9K Memory for LatticeECP/EC Devices
Table 8-6 shows the various attributes available for True Dual Port Memory (RAM_DP_TRUE). Some of these
attributes are user selectable through the Module Manager GUI. For detailed attribute definitions, refer to Appendix
A.
Table 8-6. True Dual Port RAM Attributes for LatticeECP/EC
Pseudo Dual Port RAM (RAM_DP) – EBR-Based
The EBR blocks in the LatticeECP/EC devices can be configured as Pseudo-Dual Port RAM or RAM_DP. The Mod-
ule Manager allows users to generate the Verilog-HDL or VHDL along with an EDIF netlist for the memory size as
per design requirements.
The Module Manager generates the memory module, as shown in Figure 8-9.
DATA_WIDTH_A
DATA_WIDTH_B
REGMODE_A
REGMODE_B
RESETMODE
CSDECODE_A
CSDECODE_B
WRITEMODE_A
WRITEMODE_B
GSR
Memory Size
Dual Port
512 x 18
Attribute
8K x 1
4K x 2
2K x 4
1K x 9
Data Word Width Port A
Data Word Width Port B
Register Mode (Pipelining) for Port A
Register Mode (Pipelining) for Port B
Chip Select Decode for Port A
Chip Select Decode for Port B
Read / Write Mode for Port A
Read / Write Mode for Port B
Global Set Reset
Input Data
Selects the Reset type
DIA[17:0]
DIA[1:0]
DIA[3:0]
DIA[8:0]
Port A
DIA
Description
Input Data
DIB[17:0]
DIB[1:0]
DIB[3:0]
DIB[8:0]
Port B
DIB
Output Data
DOA[17:0]
DOA[1:0]
DOA[3:0]
DOA[8:0]
Port A
DOA
1, 2, 4, 9, 18
1, 2, 4, 9, 18
NOREG, OUTREG
NOREG, OUTREG
ASYNC, SYNC
000, 001, 010, 011, 100, 101,
110, 111
000, 001, 010, 011, 100, 101,
110, 111
NORMAL, WRITETHROUGH,
READBEFOREWRITE
NORMAL, WRITETHROUGH,
READBEFOREWRITE
ENABLE, DISABLE
8-9
Values
Output Data
DOB[17:0]
DOB[1:0]
DOB[3:0]
DOB[8:0]
Port B
DOB
for LatticeECP/EC Devices
Memory Usage Guide for
Address Port A
[MSB:LSB]
ENABLED
NORMAL
NORMAL
ADA[12:0]
ADA[11:0]
ADA[10:0]
Default
NOREG
NOREG
ASYNC
ADA[9:0]
ADA[8:0]
Value
000
000
1
1
Through Module
User Selectable
Address Port B
Manager
[MSB:LSB]
ADB[12:0]
ADB[11:0]
ADB[10:0]
ADB[9:0]
ADB[8:0]
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO