參數(shù)資料
型號(hào): XC3S500E-4PQG208I
廠商: Xilinx Inc
文件頁(yè)數(shù): 145/227頁(yè)
文件大?。?/td> 0K
描述: IC FPGA SPARTAN-3E 500K 208-PQFP
標(biāo)準(zhǔn)包裝: 24
系列: Spartan®-3E
LAB/CLB數(shù): 1164
邏輯元件/單元數(shù): 10476
RAM 位總計(jì): 368640
輸入/輸出數(shù): 158
門數(shù): 500000
電源電壓: 1.14 V ~ 1.26 V
安裝類型: 表面貼裝
工作溫度: -40°C ~ 100°C
封裝/外殼: 208-BFQFP
供應(yīng)商設(shè)備封裝: 208-PQFP(28x28)
配用: 122-1536-ND - KIT STARTER SPARTAN-3E
其它名稱: 122-1718
XC3S500E-4PQG208I-ND
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Spartan-3E FPGA Family: Functional Description
DS312 (v4.1) July 19, 2013
Product Specification
24
The SLICEM pair supports two additional functions:
Two 16x1 distributed RAM blocks, RAM16
Two 16-bit shift registers, SRL16
Each of these elements is described in more detail in the
following sections.
Logic Cells
The combination of a LUT and a storage element is known
as a “Logic Cell”. The additional features in a slice, such as
the wide multiplexers, carry logic, and arithmetic gates, add
to the capacity of a slice, implementing logic that would
otherwise require additional LUTs. Benchmarks have
shown that the overall slice is equivalent to 2.25 simple logic
cells. This calculation provides the equivalent logic cell
count shown in Table 9.
Slice Details
Figure 15 is a detailed diagram of the SLICEM. It represents
a superset of the elements and connections to be found in
all slices. The dashed and gray lines (blue when viewed in
color) indicate the resources found only in the SLICEM and
not in the SLICEL.
Each slice has two halves, which are differentiated as top
and bottom to keep them distinct from the upper and lower
slices in a CLB. The control inputs for the clock (CLK), Clock
Enable (CE), Slice Write Enable (SLICEWE1), and
Reset/Set (RS) are shared in common between the two
halves.
The LUTs located in the top and bottom portions of the slice
are referred to as “G” and “F”, respectively, or the “G-LUT”
and the “F-LUT”. The storage elements in the top and
bottom portions of the slice are called FFY and FFX,
respectively.
Each slice has two multiplexers with F5MUX in the bottom
portion of the slice and FiMUX in the top portion. Depending
on the slice, the FiMUX takes on the name F6MUX,
F7MUX, or F8MUX, according to its position in the
multiplexer chain. The lower SLICEL and SLICEM both
have an F6MUX. The upper SLICEM has an F7MUX, and
the upper SLICEL has an F8MUX.
The carry chain enters the bottom of the slice as CIN and
exits at the top as COUT. Five multiplexers control the chain:
CYINIT, CY0F, and CYMUXF in the bottom portion and
CY0G and CYMUXG in the top portion. The dedicated
arithmetic logic includes the exclusive-OR gates XORF and
XORG (bottom and top portions of the slice, respectively)
as well as the AND gates FAND and GAND (bottom and top
portions, respectively).
See Table 10 for a description of all the slice input and
output signals.
Table 10: Slice Inputs and Outputs
Name
Location
Direction
Description
F[4:1]
SLICEL/M Bottom
Input
F-LUT and FAND inputs
G[4:1]
SLICEL/M Top
Input
G-LUT and GAND inputs or Write Address (SLICEM)
BX
SLICEL/M Bottom
Input
Bypass to or output (SLICEM) or storage element, or control input to F5MUX,
input to carry logic, or data input to RAM (SLICEM)
BY
SLICEL/M Top
Input
Bypass to or output (SLICEM) or storage element, or control input to FiMUX,
input to carry logic, or data input to RAM (SLICEM)
BXOUT
SLICEM Bottom
Output
BX bypass output
BYOUT
SLICEM Top
Output
BY bypass output
ALTDIG
SLICEM Top
Input
Alternate data input to RAM
DIG
SLICEM Top
Output
ALTDIG or SHIFTIN bypass output
SLICEWE1
SLICEM Common
Input
RAM Write Enable
F5
SLICEL/M Bottom
Output
Output from F5MUX; direct feedback to FiMUX
FXINA
SLICEL/M Top
Input
Input to FiMUX; direct feedback from F5MUX or another FiMUX
FXINB
SLICEL/M Top
Input
Input to FiMUX; direct feedback from F5MUX or another FiMUX
Fi
SLICEL/M Top
Output
Output from FiMUX; direct feedback to another FiMUX
CE
SLICEL/M Common
Input
FFX/Y Clock Enable
SR
SLICEL/M Common
Input
FFX/Y Set or Reset or RAM Write Enable (SLICEM)
CLK
SLICEL/M Common
Input
FFX/Y Clock or RAM Clock (SLICEM)
SHIFTIN
SLICEM Top
Input
Data input to G-LUT RAM
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