參數(shù)資料
型號(hào)： XCS20-3VQ100C
廠商： Xilinx Inc
文件頁(yè)數(shù)： 5/83頁(yè)
文件大?。?/td> 0K
描述： IC FPGA 5V C-TEMP 100-VQFP
產(chǎn)品變化通告： Spartan,Virtex FPGA/SCD Discontinuation 18/Oct/2010
標(biāo)準(zhǔn)包裝： 90
系列： Spartan®
LAB/CLB數(shù)： 400
邏輯元件/單元數(shù)： 950
RAM 位總計(jì)： 12800
輸入/輸出數(shù)： 77
門(mén)數(shù)： 20000
電源電壓： 4.75 V ~ 5.25 V
安裝類(lèi)型： 表面貼裝
工作溫度： 0°C ~ 85°C
封裝/外殼： 100-TQFP
供應(yīng)商設(shè)備封裝： 100-VQFP（14x14）
Spartan and Spartan-XL FPGA Families Data Sheet
DS060 (v2.0) March 1, 2013
13
Product Specification
R
Product Obsolete/Under Obsolescence
The four Primary Global buffers offer the shortest delay and
negligible skew. Four Secondary Global buffers have
slightly longer delay and slightly more skew due to poten-
tially heavier loading, but offer greater flexibility when used
to drive non-clock CLB inputs. The eight Global Low-Skew
buffers in the Spartan-XL devices combine short delay, neg-
ligible skew, and flexibility.
The Primary Global buffers must be driven by the semi-ded-
icated pads (PGCK1-4). The Secondary Global buffers can
be sourced by either semi-dedicated pads (SGCK1-4) or
internal nets. Each corner of the device has one Primary
buffer and one Secondary buffer. The Spartan-XL family
has eight global low-skew buffers, two in each corner. All
can be sourced by either semi-dedicated pads (GCK1-8) or
internal nets.
Using the library symbol called BUFG results in the software
choosing the appropriate clock buffer, based on the timing
requirements of the design. A global buffer should be spec-
ified for all timing-sensitive global signal distribution. To use
a global buffer, place a BUFGP (primary buffer), BUFGS
(secondary buffer), BUFGLS (Spartan-XL family global
low-skew buffer), or BUFG (any buffer type) element in a
schematic or in HDL code.
Advanced Features Description
Distributed RAM
Optional modes for each CLB allow the function generators
(F-LUT and G-LUT) to be used as Random Access Memory
(RAM).
Read and write operations are significantly faster for this
on-chip RAM than for off-chip implementations. This speed
advantage is due to the relatively short signal propagation
delays within the FPGA.
Memory Configuration Overview
There are two available memory configuration modes: sin-
gle-port RAM and dual-port RAM. For both these modes,
write operations are synchronous (edge-triggered), while
read operations are asynchronous. In the single-port mode,
a single CLB can be configured as either a 16 x 1, (16 x 1)
x 2, or 32 x 1 RAM array. In the dual-port mode, a single
CLB can be configured only as one 16 x 1 RAM array. The
different CLB memory configurations are summarized in
Table 8. Any of these possibilities can be individually pro-
grammed into a Spartan/XL FPGA CLB.
Figure 11: 5V Spartan Family Global Net Distribution
X4
ds060_11_080400
X4
4
One BUFGP
per Global Line
One BUFGP
per Global Line
Any BUFGS
BUFGP
PGCK4
SGCK4
PGCK3
SGCK3
BUFGS
BUFGP
BUFGS
IOB
BUFGS
BUFGP
SGCK1
PGCK1
SGCK2
PGCK2
IOB
X4
locals
4
CLB
locals
CLB
locals
Table 8: CLB Memory Configurations
Mode
16 x 1
(16 x 1) x 2
32 x 1
Single-Port
√√
√
Dual-Port
√
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