参数资料
型号: EPF10K100EQC240-3N
厂商: Altera
文件页数: 12/100页
文件大小: 0K
描述: IC FLEX 10KE FPGA 100K 240-PQFP
产品培训模块: Three Reasons to Use FPGA's in Industrial Designs
标准包装: 24
系列: FLEX-10KE®
LAB/CLB数: 624
逻辑元件/单元数: 4992
RAM 位总计: 49152
输入/输出数: 189
门数: 257000
电源电压: 2.375 V ~ 2.625 V
安装类型: 表面贴装
工作温度: 0°C ~ 85°C
封装/外壳: 240-BFQFP
供应商设备封装: 240-PQFP(32x32)
Altera Corporation
19
FLEX 10KE Embedded Programmable Logic Devices Data Sheet
Figure 9 shows how an n-bit full adder can be implemented in n +1 LEs
with the carry chain. One portion of the LUT generates the sum of two bits
using the input signals and the carry-in signal; the sum is routed to the
output of the LE. The register can be bypassed for simple adders or used
for an accumulator function. Another portion of the LUT and the carry
chain logic generates the carry-out signal, which is routed directly to the
carry-in signal of the next-higher-order bit. The final carry-out signal is
routed to an LE, where it can be used as a general-purpose signal.
Figure 9. FLEX 10KE Carry Chain Operation (n-Bit Full Adder)
LUT
a1
b1
Carry Chain
s1
LE1
Register
a2
b2
Carry Chain
s2
LE2
Register
Carry Chain
sn
LEn
Register
an
bn
Carry Chain
Carry-Out
LEn + 1
Register
Carry-In
LUT
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