LF3370 datasheet(16/24 Pages) LODEV

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LF3370

High-Definition Video Format Converter

03/13/2001–LDS.3370-F

Video Imaging Products

DEVICES INCORPORATED

BITS

FUNCTION

DESCRIPTION

12-0

Channel ‘A’ Blanking Word

Channel ‘A’ Blanking Level Word

programmedtodoublethelength[(de-

sired length x 2) – 2)] to properly align

data due to the core running at half the

CLKrate.

FirstOperationSelect

‘First Operation Select’ is a bypassing

option where you select to use the first

functional block (Half-Band Filter or

MatrixMultiplier/KeyScaler)inanygiven

arrangement. Ifthedevicewasarrangedin

such a way that the Half-Band Filter section

fedtheMatrixMultiplier/KeyScalersection

and ‘First Operation Select’ was enabled,

theHalf-BandFiltersectionwillbeused

andtheMatrixMultiplier/KeyScaler

sectionwillbebypassed.

If the device was arranged in such a way

thattheMatrixMultiplier/KeyScaler

section fed the Half-Band Filter section

and ‘First Operation Select’ was enabled,

theMatrixMultiplier/KeyScalersection

will be used - its output will be routed

directlytotheoutputLUTsection. Unlike

in other bypassing options , the total

pipeline latency of the LF3370 is reduced

bytheappropriatedelay. IftheHalf-Band

Filtersectionwasbypassedbythismethod,

the overall pipeline latency should be

reduced by 35 CLK cycles. If the Matrix

Multiplier section was bypassed by this

method,theoverallpipelinelatency

should be reduced by 6 CLK cycles. This

functionisimplementedbyconfiguringbit

9 of Configuration Register 0. The ‘Func-

tionalArrangement’ofthedeviceis

determinedbyconfiguringbit4ofCon-

figurationRegister0.

TABLE 12.

CONFIGURATION REGISTER 12 – ADDRESS 207

BITS

FUNCTION

DESCRIPTION

12-0

Channel ‘B’ Blanking Word

Channel ‘B’ Blanking Level Word

TABLE 13.

CONFIGURATION REGISTER 13– ADDRESS 208

BITS

FUNCTION

DESCRIPTION

12-0

Channel ‘C’ Blanking Word

Channel ‘C’ Blanking Level Word

TABLE 14.

CONFIGURATION REGISTER 14 – ADDRESS 209

BITS

FUNCTION

DESCRIPTION

12-0

Channel ‘D’ Blanking Word

Channel ‘D’ Blanking Level Word

TABLE 15.

CONFIGURATION REGISTER 15 – ADDRESS 20A

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