Datasheet > LF48908

LF48908

更新时间： 2024-11-23 22:36:31

品牌	Logo	应用领域
逻辑 - LOGIC		/
页数	文件大小	规格书
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描述
Two Dimensional Convolver

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LF48908 数据手册

LF48908

DEVICES INCORPORATED

Two Dimensional Convolver

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

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

CASI15-0

DIN7-0

ROW

BUFFERS

CIN9-0

ALU

2-0

3 x 3

DOUT19-0

CONVOLVER

CASO7-0

CLK

HOLD

EALU

RESET

FRAME

CONTROL

LOGIC

Video Imaging Products

08/9/2000–LDS.48908-J

12 3 4 5 6 7...16

中文翻译

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与LF48908相关器件

型号	品牌	获取价格	描述	数据表
LF48908GC25	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908GC31	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908GC50	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908GM25	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908GM37	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908GM50	LOGIC	获取价格	Convolver, 8-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF48908JC25	LOGIC	获取价格	Video Convolver
LF48908JC31	LOGIC	获取价格	Video Convolver
LF48908JC50	LOGIC	获取价格	Video Convolver
LF48908JI25	ETC	获取价格	Video Convolver

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