LFE2-20E-5FN256I Lattice, LFE2-20E-5FN256I Datasheet - Page 620

• 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
Figure 12-1. Typical DDR SDRAM Interface
Figure 12-2. Typical DDR2 SDRAM Interface
The following two figures show the DQ and DQS relationship for memory read and write interfaces.
Figure 12-3. DQ-DQS During READ
(DDR Memory Controller)
(DDR Memory Controller)
(at REG)
(at REG)
(at PIN)
(at PIN)
DQS
DQS
DQ
DQ
FPGA
FPGA
DQS, DQS#
COMMAND
COMMAND
ADDRESS
CONTROL
CLK/CLKN
CLK/CLKN
ADDRESS
CONTROL
DQ<7:0>
DQ<7:0>
DQS
DM
DM
Preamble
CLKP/CLKN
COMMAND
DQS, DQS#
CLKP/CLKN
COMMAND
ADDRESS
CONTROL
CONTROL
ADDRESS
REG and 90
DQS PIN to
Phase Shift
DQ<7:0>
DQ<7:0>
Degree
DQS
DM
DM
12-2
8
X
Y
Z
8
X
Y
Z
Postamble
DQ<7:0>
DQS
DM
ADDRESS
COMMAND
CONTROL
CLK/CLKN
DQ<7:0>
DQS, DQS#
DM
ADDRESS
COMMAND
CONTROL
CLK/CLKN
DDR Memory
DDR Memory
High-Speed I/O Interface
LatticeECP2/M