- 您现在的位置：买卖IC网 > Sheet目录331 > IPTR-DSPBUILDER (Altera)DSP BUILDER SOFTWARE
Chapter 15: Arithmetic Library
15–11
The following equation expresses the block function:
res = a 0 × b 0 ± a 1 × b 1 [+ a 2 × b 2 [± a 3 × b 3 ] ] [+ chainin ]
If there are four multipliers and the input bit widths are both less than or equal to 18,
you can optionally enable a chainout adder output ( chainout ) instead of the normal
output ( res ).
If there are four multipliers and the input bit widths are both equal to 18, you can
enable a chainout adder input ( chainin ). Only drive this chainin port from the
chainout output of a DSP block at the preceding stage.
Other features include:
■
■
■
■
■
■
■
■
Parameterizable input and output data widths
Optional asynchronous clear and clock enable inputs
Optional accumulator synchronous load input
Optional shiftin instead of an a input
Optional shift out from the a input of the last multiplier
Optional saturation overflow outputs
Optional registers to pipeline the adder and chainout adder
Optional accumulator mode
f For more information about multiplier or adder operations, refer to the altmult_add
Megafunction User Guide .
Table 15–19 shows the DSP block inputs and outputs.
Table 15–19. DSP Block Inputs and Outputs
a0—a3
b0—b3
ena
Signal
Direction
Input
Input
Input
Operand a.
Operand b.
Optional clock enable.
Description
chainin
Input
Optional input bus from the preceding stage.
(1)
zero_chainout
aclr
accum_sload
res
shiftouta
overflow
chainout
Input
Input
Input
Output
Output
Output
Output
Optional reset to zero for the chainout value.
Optional asynchronous clear.
Optional accumulator synchronous load input.
Result.
Optional shift out from A input of last multiplier.
Optional saturation overflow output.
Optional chainout output. (Replaces the res output when
enabled.)
Note to Table 15–19 :
(1) Use the chainin port to feed the adder result ( chainout ) from a previous stage. Do not use for any other signal.
November 2013
Altera Corporation
DSP Builder Handbook
Volume 2: DSP Builder Standard Blockset
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
IR11662SPBF
IC CNTROL SMART RECTIFIER 8-SOIC
IR1166STRPBF
IC MOSFET DRIVER N-CH 200V 8SOIC
IR11672ASPBF
IC MOSFET DRIVER 200V 8-SOIC
IR1167ASTRPBF
IC SMART SECONDARY DRIVER 8-SOIC
IR11682STRPBF
IC MOSFET DRIVER DUAL 200V 8SOIC
IR1168SPBF
IC MOSFET DRIVER DUAL 200V 8SOIC
IR1176STR
IC DRIVER RECT SYNC 5V 4A 20SSOP
IR2010SPBF
IC DRIVER HIGH/LOW SIDE 16SOIC
相关代理商/技术参数
IP-TRIETHERNET
功能描述:开发软件 Triple Spd Ethernet MegaCore
RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
IP-TRIETHERNETF
功能描述:开发软件 3x Spd Ethernet MAC MegaCore
RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
IPTV-OPTION-INS970
制造商:3M Electronic Products Division 功能描述:IPTV OPTION FOR INS970
IPU039N03L G
功能描述:MOSFET N-CH 30V 50A 3.9mOhms RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
IPU039N03LG
制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:OptiMOS?3 Power-Transistor Features Fast switching MOSFET for SMPS
IPU039N03LGXK
制造商:Infineon Technologies AG 功能描述:Trans MOSFET N-CH 30V 50A 3-Pin(3+Tab) TO-251
IPU04N03LA
功能描述:MOSFET N-CH 25V 50A IPAK RoHS:否 类别:分离式半导体产品 >> FET - 单 系列:OptiMOS™ 标准包装:1,000 系列:MESH OVERLAY™ FET 型:MOSFET N 通道，金属氧化物 FET 特点:逻辑电平门 漏极至源极电压(Vdss):200V 电流 - 连续漏极(Id) @ 25° C:18A 开态Rds（最大）@ Id, Vgs @ 25° C:180 毫欧 @ 9A，10V Id 时的 Vgs(th)（最大）:4V @ 250µA 闸电荷(Qg) @ Vgs:72nC @ 10V 输入电容 (Ciss) @ Vds:1560pF @ 25V 功率 - 最大:40W 安装类型:通孔 封装/外壳:TO-220-3 整包 供应商设备封装:TO-220FP 包装:管件
IPU04N03LA G
功能描述:MOSFET N-CH 25V 50A IPAK RoHS:是 类别:分离式半导体产品 >> FET - 单 系列:OptiMOS™ 标准包装:1,000 系列:MESH OVERLAY™ FET 型:MOSFET N 通道，金属氧化物 FET 特点:逻辑电平门 漏极至源极电压(Vdss):200V 电流 - 连续漏极(Id) @ 25° C:18A 开态Rds（最大）@ Id, Vgs @ 25° C:180 毫欧 @ 9A，10V Id 时的 Vgs(th)（最大）:4V @ 250µA 闸电荷(Qg) @ Vgs:72nC @ 10V 输入电容 (Ciss) @ Vds:1560pF @ 25V 功率 - 最大:40W 安装类型:通孔 封装/外壳:TO-220-3 整包 供应商设备封装:TO-220FP 包装:管件