参数资料
型号: XA3S250E-4PQG208Q
厂商: Xilinx Inc
文件页数: 16/37页
文件大小: 0K
描述: IC FPGA SPARTAN-3E 250K 208-PQFP
标准包装: 24
系列: Spartan®-3E XA
LAB/CLB数: 612
逻辑元件/单元数: 5508
RAM 位总计: 221184
输入/输出数: 158
门数: 250000
电源电压: 1.14 V ~ 1.26 V
安装类型: 表面贴装
工作温度: -40°C ~ 125°C
封装/外壳: 208-BFQFP
供应商设备封装: 208-PQFP(28x28)
DS635 (v2.0) September 9, 2009
Product Specification
23
R
Block RAM Timing
Clock Frequency
FMULT
Internal operating frequency for a two-stage 18x18 multiplier using the
AREG and BREG input registers and the PREG output register(1)
0240
MHz
Notes:
1.
Combinatorial delay is less and pipelined performance is higher when multiplying input data with less than 18 bits.
2.
The PREG register is typically used in both single-stage and two-stage pipelined multiplier implementations.
3.
Input registers AREG or BREG are typically used when inferring a two-stage multiplier.
Table 24: 18 x 18 Embedded Multiplier Timing (Continued)
Symbol
Description
-4 Speed Grade
Units
Min
Max
Table 25: Block RAM Timing
Symbol
Description
-4 Speed Grade
Units
Min
Max
Clock-to-Output Times
TBCKO
When reading from block RAM, the delay from the active transition
at the CLK input to data appearing at the DOUT output
-2.82
ns
Setup Times
TBACK
Setup time for the ADDR inputs before the active transition at the
CLK input of the block RAM
0.38
-ns
TBDCK
Setup time for data at the DIN inputs before the active transition at
the CLK input of the block RAM
0.23
-ns
TBECK
Setup time for the EN input before the active transition at the CLK
input of the block RAM
0.77
-ns
TBWCK
Setup time for the WE input before the active transition at the CLK
input of the block RAM
1.26
-ns
Hold Times
TBCKA
Hold time on the ADDR inputs after the active transition at the CLK
input
0.14
-ns
TBCKD
Hold time on the DIN inputs after the active transition at the CLK
input
0.13
-ns
TBCKE
Hold time on the EN input after the active transition at the CLK input
0
-ns
TBCKW
Hold time on the WE input after the active transition at the CLK input
0
-ns
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