參數資料
型號: LFEC1E-4QN208I
廠商: Lattice Semiconductor Corporation
文件頁數: 78/163頁
文件大小: 0K
描述: IC FPGA 1.5KLUTS 208PQFP
標準包裝: 48
系列: EC
邏輯元件/單元數: 1500
RAM 位總計: 18432
輸入/輸出數: 112
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
供應商設備封裝: 208-PQFP(28x28)
2-18
Architecture
LatticeECP/EC Family Data Sheet
MULTADDSUM sysDSP Element
In this case, the operands A0 and B0 are multiplied and the result is added/subtracted with the result of the multi-
plier operation of operands A1 and B1. Additionally the operands A2 and B2 are multiplied and the result is added/
subtracted with the result of the multiplier operation of operands A3 and B3. The result of both addition/subtraction
are added in a summation block. The user can enable the input, output and pipeline registers. Figure 2-22 shows
the MULTADDSUM sysDSP element.
Figure 2-22. MULTADDSUM
Clock, Clock Enable and Reset Resources
Global Clock, Clock Enable and Reset signals from routing are available to every DSP block. Four Clock, Reset
and Clock Enable signals are selected for the sysDSP block. From four clock sources (CLK0, CLK1, CLK2, CLK3)
one clock is selected for each input register, pipeline register and output register. Similarly Clock enable (CE) and
Reset (RST) are selected from their four respective sources (CE0, CE1, CE2, CE3 and RST0, RST1, RST2, RST3)
at each input register, pipeline register and output register.
Multiplier
Add/Sub0
x
n
m
m+n
(default)
m+n
(default)
m+n+1
m+n+2
m+n+1
m+n
(default)
m+n
(default)
m
n
m
n
m
n
m
x
n
m
n
m
Multiplier
Add/Sub1
x
n
m
n
m
n
m
n
m
x
n
m
n
m
n
m
SUM
Multiplier B0
Multiplicand A0
Multiplier B1
Multiplicand A1
Multiplier B2
Multiplicand A2
Multiplier B3
Multiplicand A3
Signed
Shift Register B In
Output
Addn0
Pipeline
Register
CLK (CLK0,CLK1,CLK2,CLK3)
CE (CE0,CE1,CE2,CE3)
RST(RST0,RST1,RST2,RST3)
Input
Register
Pipeline
Register
Input
Register
To Add/Sub0
To Add/Sub0, Add/Sub1
Pipeline
Register
Pipeline
Register
Input
Register
To Add/Sub1
Addn1
Pipeline
Register
Pipeline
Register
Pipeline
Register
Shift Register A In
Shift Register B Out
Shift Register A Out
Input Data
Register A
Input Data
Register A
Input Data
Register A
Input Data
Register A
Input Data
Register B
Input Data
Register B
Input Data
Register B
Input Data
Register B
Output
Register
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