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LF48908JC50 PDF预览

LF48908JC50

更新时间: 2024-02-16 10:21:14
品牌 Logo 应用领域
逻辑 - LOGIC /
页数 文件大小 规格书
16页 316K
描述
Video Convolver

LF48908JC50 技术参数

是否无铅: 含铅是否Rohs认证: 不符合
生命周期:Contact Manufacturer零件包装代码:LCC
包装说明:QCCJ, LDCC84,1.2SQ针数:84
Reach Compliance Code:compliant风险等级:5.27
其他特性:16 BIT CASCADE DATA INPUT AND OUTPUT PORT边界扫描:NO
最大时钟频率:20 MHz外部数据总线宽度:8
JESD-30 代码:S-PQCC-J84JESD-609代码:e0
长度:29.3116 mm低功率模式:NO
湿度敏感等级:3端子数量:84
最高工作温度:70 °C最低工作温度:
输出数据总线宽度:20封装主体材料:PLASTIC/EPOXY
封装代码:QCCJ封装等效代码:LDCC84,1.2SQ
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not Qualified座面最大高度:5.08 mm
子类别:DSP Peripherals最大压摆率:110 mA
最大供电电压:5.25 V最小供电电压:4.75 V
标称供电电压:5 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:J BEND
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:29.3116 mm
uPs/uCs/外围集成电路类型:DSP PERIPHERAL, CONVOLVERBase Number Matches:1

LF48908JC50 数据手册

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LF48908  
Two Dimensional Convolver  
DEVICES INCORPORATED  
FEATURES  
DESCRIPTION  
The LF48908 is a high-speed two  
dimensional convolver that imple-  
ments a 3 x 3 kernel convolution at  
real-time video rates. Programmable  
row buffers are located on-chip,  
cycle. The FRAME signal resets all  
data registers without affecting the  
control and coefficient registers.  
40 MHz Data and Computation  
Rate  
Nine Multiplier Array with 8-bit  
Data and 8-bit Coefficient Inputs  
Pixel and coefficient input data are  
both 8-bits and can be either signed or  
unsigned integers. Image data should  
be in a raster scan non-interlaced  
format. The LF48908 can internally  
store images as wide as 1024 pixels for  
the 3 x 3 convolution. By using  
external row buffers and multiple  
LF48908s, longer pixel rows can be  
used and convolutions with larger  
kernel sizes can be performed. Out-  
put data is 20-bits and this guarantees  
no overflow for kernel sizes up to 4 x 4.  
A separate cascade input is used as  
the data input for summing results  
from multiple LF48908s. It can also  
function as the data input path when  
external line buffers are used.  
Separate Cascade Input and Output  
eliminating the need for external data  
storage. Each row buffer can store up  
to 1024 pixels. Two internal register  
banks are provided allowing two  
separate sets of filter coefficients to be  
stored simultaneously. Adaptive filter  
operations are possible when both  
register banks are used. An on-chip  
ALU is provided, allowing real-time  
arithmetic and logical pixel point  
operations to be performed on the  
image data. The 3 x 3 convolver  
comprises nine 8 x 8-bit multipliers,  
various pipeline registers, and sum-  
mers. A complete sum-of-products  
operation is performed every clock  
Ports  
On-board Programmable Row  
Buffers  
Two Coefficient Mask Registers  
On-board 8-bit ALU  
Two’s Complement or Unsigned  
Operands  
Replaces Harris HSP48908  
DECC SMD No. 5962-93007  
Package Styles Available:  
• 84-pin Plastic LCC, J-Lead  
• 100-pin Plastic Quad Flatpack  
FIGURE 1. LF48908 BLOCK DIAGRAM  
16  
CASI15-0  
8
DIN7-0  
8
ROW  
BUFFERS  
CIN9-0  
ALU  
3
A
2-0  
LD  
CS  
20  
3 x 3  
DOUT19-0  
CONVOLVER  
8
CASO7-0  
CLK  
HOLD  
EALU  
RESET  
FRAME  
OE  
CONTROL  
LOGIC  
Video Imaging Products  
08/9/2000–LDS.48908-J  
1

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