LAXP2-17E-5FTN256E Lattice, LAXP2-17E-5FTN256E Datasheet - Page 19

• Manufacturer Part Number: LAXP2-17E-5FTN256E
• Description: IC FPGA AUTO 17K LUTS 256-BGA
• Manufacturer: Lattice

Specifications of LAXP2-17E-5FTN256E

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Lattice Semiconductor
Table 2-5. sysMEM Block Con• gurations
Bus Size Matching
All of the multi-port memory modes support different widths on each of the ports. The RAM bits are mapped LSB
word 0 to MSB word 0, LSB word 1 to MSB word 1, and so on. Although the word size and number of words for
each port varies, this mapping scheme applies to each port.
FlashBAK EBR Content Storage
All the EBR memory in the LA-LatticeXP2 is shadowed by Flash memory. Optionally, initialization values for the
memory blocks can be defined using the Lattice ispLEVER tools. The initialization values are loaded into the Flash
memory during device programming and into the SRAM at power up or whenever the device is reconfigured. This
feature is ideal for the storage of a variety of information such as look-up tables and microprocessor code. It is also
possible to write the current contents of the EBR memory back to Flash memory. This capability is useful for the
storage of data such as error codes and calibration information. For additional information on the FlashBAK capa-
bility see TN1137,
Figure 2-16. FlashBAK Technology
Memory Cascading
Larger and deeper blocks of RAMs can be created using EBR sysMEM Blocks. Typically, the Lattice design tools
cascade memory transparently, based on speci• c design inputs.
Single, Dual and Pseudo-Dual Port Modes
In all the sysMEM RAM modes the input data and address for the ports are registered at the input of the memory
array. The output data of the memory is optionally registered at the output.
LatticeXP2 Memory Usage
FPGA Logic
Make Infinite Reads and
Writes to EBR
Single Port
True Dual Port
Pseudo Dual Port
Memory Mode
Guide.
EBR
2-16
Flash
Configurations
16,384 x 1
1,024 x 18
16,384 x 1
1,024 x 18
16,384 x 1
1,024 x 18
8,192 x 2
4,096 x 4
2,048 x 9
8,192 x 2
4,096 x 4
2,048 x 9
8,192 x 2
4,096 x 4
2,048 x 9
512 x 36
512 x 36
EBR During Configuration /
Write From EBR to Flash
Write to Flash During
Write From Flash to
on User Command
LA-LatticeXP2 Family Data Sheet
Programming
JTAG / SPI Port
Architecture