LFEC6E-4FN256I LATTICE SEMICONDUCTOR, LFEC6E-4FN256I Datasheet - Page 28
LFEC6E-4FN256I
Manufacturer Part Number
LFEC6E-4FN256I
Description
FPGA LatticeEC Family 6100 Cells 378MHz 130nm (CMOS) Technology 1.2V 256-Pin FBGA
Manufacturer
LATTICE SEMICONDUCTOR
Datasheet
1.LFEC3E-5TN144C.pdf
(163 pages)
Specifications of LFEC6E-4FN256I
Package
256FBGA
Family Name
LatticeEC
Device Logic Units
6100
Maximum Internal Frequency
378 MHz
Typical Operating Supply Voltage
1.2 V
Maximum Number Of User I/os
195
Ram Bits
94208
In System Programmability
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LFEC6E-4FN256I
Manufacturer:
Lattice Semiconductor Corporation
Quantity:
10 000
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Lattice Semiconductor
Figure 2-29. Output Register Block
Figure 2-30. ODDRXB Primitive
Tristate Register Block
The tristate register block provides the ability to register tri-state control signals from the core of the device before
they are passed to the sysI/O buffers. The block contains a register for SDR operation and an additional latch for
DDR operation. Figure 2-31 shows the diagram of the Tristate Register Block.
In SDR mode, ONEG1 feeds one of the flip-flops that then feeds the output. The flip-flop can be configured a D-
type or latch. In DDR mode, ONEG1 is fed into one register on the positive edge of the clock and OPOS1 is
latched. A multiplexer running off the same clock selects the correct register for feeding to the output (D0).
Routing
From
ONEG0
OPOS0
CLK1
*Latch is transparent when input is low.
CLK
LSR
DA
DB
/LATCH
D
D
D-Type
LE*
Latch
ODDRXB
2-25
Q
Q
Q
0
1
LatticeECP/EC Family Data Sheet
Programmed
Control
OUTDDN
0
1
To sysIO
Buffer
DO
Architecture
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