参数资料
| 型号： | XCS20XL-4PQ208I |
| 厂商： | Xilinx Inc |
| 文件页数： | 34/83页 |
| 文件大小： | 0K |
| 描述： | IC FPGA 3.3V I-TEMP HP 208-PQFP |
| 产品变化通告： | Product Discontinuation 26/Oct/2011 |
| 标准包装： | 24 |
| 系列： | Spartan®-XL |
| LAB/CLB数： | 400 |
| 逻辑元件/单元数： | 950 |
| RAM 位总计： | 12800 |
| 输入/输出数： | 160 |
| 门数： | 20000 |
| 电源电压： | 3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 工作温度： | -40°C ~ 100°C |
| 封装/外壳： | 208-BFQFP |
| 供应商设备封装： | 208-PQFP（28x28） |
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Spartan and Spartan-XL FPGA Families Data Sheet
4
DS060 (v2.0) March 1, 2013
Product Specification
R
Product Obsolete/Under Obsolescence
A CLB can implement any of the following functions:
Any function of up to four variables, plus any second
function of up to four unrelated variables, plus any third
function of up to three unrelated variables
Note: When three separate functions are generated, one of
the function outputs must be captured in a flip-flop internal to
the CLB. Only two unregistered function generator outputs
are available from the CLB.
Any single function of five variables
Any function of four variables together with some
functions of six variables
Some functions of up to nine variables.
Implementing wide functions in a single block reduces both
the number of blocks required and the delay in the signal
path, achieving both increased capacity and speed.
The versatility of the CLB function generators significantly
improves system speed. In addition, the design-software
tools can deal with each function generator independently.
This flexibility improves cell usage.
Flip-Flops
Each CLB contains two flip-flops that can be used to regis-
ter (store) the function generator outputs. The flip-flops and
function generators can also be used independently (see
Figure 2). The CLB input DIN can be used as a direct input
to either of the two flip-flops. H1 can also drive either
flip-flop via the H-LUT with a slight additional delay.
The two flip-flops have common clock (CK), clock enable
(EC) and set/reset (SR) inputs. Internally both flip-flops are
also controlled by a global initialization signal (GSR) which
is described in detail in Global Signals: GSR and GTS,
Latches (Spartan-XL Family Only)
The Spartan-XL family CLB storage elements can also be
configured as latches. The two latches have common clock
(K) and clock enable (EC) inputs. Functionality of the stor-
age element is described in Table 2.
Figure 2: Spartan/XL Simplified CLB Logic Diagram (some features not shown)
G4
G
H1
F
G4
G3
G2
G1
DYQ
Y
X
SR
CK
EC
Q
G1
SR
H1
DIN
G
H
Logic
Function
of
G1-G4
Logic
Function
of
F-G-H1
Multiplexer Controlled
by Configuration Program
G-LUT
F4
F3
F2
F1
K
EC
G
Logic
Function
of
F1-F4
F-LUT
H-LUT
A
B
DXQ
SR
CK
EC
Q
DS060_02_0506 01
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