参数资料
型号: XCS05-4PC84C
厂商: Xilinx Inc
文件页数: 9/83页
文件大小: 0K
描述: IC FPGA 5V C-TEMP 84-PLCC
标准包装: 15
系列: Spartan®
LAB/CLB数: 100
逻辑元件/单元数: 238
RAM 位总计: 3200
输入/输出数: 61
门数: 5000
电源电压: 4.75 V ~ 5.25 V
安装类型: 表面贴装
工作温度: 0°C ~ 85°C
封装/外壳: 84-LCC(J 形引线)
供应商设备封装: 84-PLCC
Spartan and Spartan-XL FPGA Families Data Sheet
DS060 (v2.0) March 1, 2013
17
Product Specification
R
Product Obsolete/Under Obsolescence
and Spartan-XL families, speeding up arithmetic and count-
ing functions.
The carry chain in 5V Spartan devices can run either up or
down. At the top and bottom of the columns where there are
no CLBs above and below, the carry is propagated to the
right. The default is always to propagate up the column, as
shown in the figures. The carry chain in Spartan-XL devices
can only run up the column, providing even higher speed.
Figure 16, page 18 shows a Spartan/XL FPGA CLB with
dedicated fast carry logic. The carry logic shares operand
and control inputs with the function generators. The carry
outputs connect to the function generators, where they are
combined with the operands to form the sums.
Figure 17, page 19 shows the details of the Spartan/XL
FPGA carry logic. This diagram shows the contents of the
box labeled "CARRY LOGIC" in Figure 16.
The fast carry logic can be accessed by placing special
library symbols, or by using Xilinx Relationally Placed Mac-
ros (RPMs) that already include these symbols.
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