参数资料
型号: OR4E041BM416-DB
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
英文描述: FPGA, 1296 CLBS, 380000 GATES, PBGA416
封装: PLASTIC, FBGA-416
文件页数: 60/151页
文件大小: 2680K
代理商: OR4E041BM416-DB
16
Lattice Semiconductor
Data Sheet
September, 2002
ORCA Series 4 FPGAs
Programmable Logic Cells (continued)
The ripple mode can be used in one of four submodes.
The rst of these is adder-subtractor submode. In
this submode, each LUT generates three separate out-
puts. One of the three outputs selects whether the
carry-in is to be propagated to the carry-out of the cur-
rent LUT or if the carry-out needs to be generated. If
the carry-out needs to be generated, this is provided by
the second LUT output. The result of this selection is
placed on the carry-out signal, which is connected to
the next LUT carry-in or the COUT/FCOUT signal, if it
is the last LUT (K7/K3). Both of these outputs can be
any equation created from KZ[1] and KZ[0], but in this
case, they have been set to the propagate and gener-
ate functions.
The third LUT output creates the result bit for each LUT
output connected to F[7:0]/F[3:0]. If an adder/subtrac-
tor is needed, the control signal to select addition or
subtraction is input on F5A/F5C inputs. These inputs
generate the controller input AS. When AS = 0 this
function performs the adder, A + B. When AS = 1 the
function performs the subtractor, A – B. The result bit is
created in one-half of the LUT from a single bit from
each input bus KZ[1:0], along with the ripple input bit.
The second submode is the counter submode (see
Figure 10). The present count, which may be initialized
via the PFU DIN inputs to the latches/FFs, is supplied
to input KZ[0], and then output F[7:0]/F[3:0] will either
be incremented by one for an up counter or decre-
mented by one for a down counter. If an up/down
counter is needed, the control signal to select the direc-
tion (up or down) is input on F5A and F5C. When
F5[A:C], respectively per nibble, is a logic 1, this indi-
cates a down counter and a logic 0 indicates an up
counter.
5-5756(F)
Figure 10. Counter Submode
F7
K7[0]
K7
DQ
C
DQ
Q7
REGCOUT
COUT
F6
K6[0]
K6
DQ
Q6
F4
K4[0]
K4
DQ
Q4
F3
K3[0]
K3
DQ
Q3
F2
K2[0]
K2
DQ
Q2
F1
K1[0]
K1
DQ
Q1
F5
K5[0]
K5
DQ
Q5
F0
K0[0]
K0
DQ
Q0
CIN/FCIN
FCOUT
相关PDF资料
PDF描述
OR4E041BM680-DB FPGA, 1296 CLBS, 380000 GATES, PBGA680
OR4E042BA352-DB FPGA, 1296 CLBS, 380000 GATES, PBGA352
OR4E042BM416-DB FPGA, 1296 CLBS, 380000 GATES, PBGA416
OR4E042BM680-DB FPGA, 1296 CLBS, 380000 GATES, PBGA680
OR4E043BA352-DB FPGA, 1296 CLBS, 380000 GATES, PBGA352
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OR4E04-2BA352I 功能描述:FPGA - 现场可编程门阵列 10368 LUT 466 I/O RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256