参数资料
型号: LFECP33E-4FN672I
厂商: Lattice Semiconductor Corporation
文件页数: 84/163页
文件大小: 0K
描述: IC FPGA 32.8KLUTS 672FPBGA
产品培训模块: LatticeECP3 Introduction
标准包装: 40
系列: ECP
逻辑元件/单元数: 32800
RAM 位总计: 434176
输入/输出数: 496
电源电压: 1.14 V ~ 1.26 V
安装类型: 表面贴装
工作温度: -40°C ~ 100°C
封装/外壳: 672-BBGA
供应商设备封装: 672-FPBGA(27x27)
2-24
Architecture
LatticeECP/EC Family Data Sheet
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.
AB
C
D
E
F
BD
DI
(In DDR Mode)
D0
D2
DQS
A
C
DQS
Delayed
IDDRXB
LSR
QA
D
ECLK
QB
DDRCLKPOL
SCLK
CE
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