LFEC3E-3QN208I Lattice, LFEC3E-3QN208I Datasheet - Page 340

• Manufacturer Part Number: LFEC3E-3QN208I
• Description: IC FPGA 3KLUTS 208PQFP
• Manufacturer: Lattice
• Series: EC3r

Specifications of LFEC3E-3QN208I

• Number Of Logic Elements/cells: 3100
• Number Of Labs/clbs: -
• Total Ram Bits: 56320
• Number Of I /o: 145
• Number Of Gates: -
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 208-BFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q6377645

Lattice Semiconductor
Figure 12-1. Simple Interface for FPGA Bootup in SPI Mode
Multiple FPGA, One SPI Flash
With a sufficiently large SPI Flash, multiple FPGAs can be configured as shown in Figure 12-2. The first FPGA is
configured in SPI Mode, the following FPGAs are configured in Slave Serial Mode.
Figure 12-2. Multiple FPGAs Configured by One SPI Flash
One FPGA, Two SPI Flash
The LatticeECP/EC devices support two Flash to configure a single device as shown in Figure 12-3. The two Flash
option is supported to allow use of smaller SPI Flash devices to configure a larger FPGA. Lattice’s ispVM
software divides the configuration bit stream evenly among each selected SPI memory. As the LatticeECP/EC
device starts to download from the two SPI memories, the data streams feed into SPID0 and SPID1 in a parallel
fashion and are reassembled internally.
SPI Flash
SCK
CS
SO
SI
SPI3 Flash
CCLK
CSSPIN
SISPI
SPID0
Lattice FPGA
SCK
SPI
SO
CS
SI
CFG0
DOUT
CFG2
CFG1
CCLK
CSSPIN
SISPI
SPID0
PROGRAMN
12-7
DI
CCLK
Lattice FPGA
Lattice FPGA
Slave Serial
SPI
LatticeECP/EC sysCONFIG Usage Guide
DOUT
CFG2
CFG1
CFG0
DONE
CFG0
CFG2
CFG1
INITN
CCLK
DI
Lattice FPGA
Slave Serial
DOUT
CFG2
CFG1
CFG0
®
System