LFEC15E-5F484C LATTICE SEMICONDUCTOR, LFEC15E-5F484C Datasheet - Page 27
LFEC15E-5F484C
Manufacturer Part Number
LFEC15E-5F484C
Description
FPGA LatticeEC Family 15400 Cells 420MHz 130nm (CMOS) Technology 1.2V 484-Pin FBGA
Manufacturer
LATTICE SEMICONDUCTOR
Datasheet
1.LFEC3E-5TN144C.pdf
(163 pages)
Specifications of LFEC15E-5F484C
Package
484FBGA
Family Name
LatticeEC
Device Logic Units
15400
Maximum Internal Frequency
420 MHz
Typical Operating Supply Voltage
1.2 V
Maximum Number Of User I/os
352
Ram Bits
358400
In System Programmability
Yes
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LFEC15E-5F484C
Manufacturer:
Lattice Semiconductor Corporation
Quantity:
10 000
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Figure 2-27. Input Register DDR Waveforms
Figure 2-28. INDDRXB Primitive
Output Register Block
The output register block provides the ability to register signals from the core of the device before they are passed
to the sysI/O buffers. The block contains a register for SDR operation that is combined with an additional latch for
DDR operation. Figure 2-29 shows the diagram of the Output Register Block.
In SDR mode, ONEG0 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, ONEG0 is fed into one register on the positive edge of the clock and OPOS0 is
latched. A multiplexer running off the same clock selects the correct register for feeding to the output (D0).
Figure 2-30 shows the design tool DDR primitives. The SDR output register has reset and clock enable available.
The additional register for DDR operation does not have reset or clock enable available.
(In DDR Mode)
Delayed
DQS
DQS
D0
D2
DI
DDRCLKPOL
A
ECLK
SCLK
LSR
CE
D
B
2-24
IDDRXB
C
B
A
QA
QB
LatticeECP/EC Family Data Sheet
D
E
D
C
F
Architecture
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