ML6440 データシートの表示（PDF） - Micro Linear Corporation

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ML6440

Multi-Standard 8-bit Adaptive Digital Input Comb Filter

Micro Linear Corporation 

ML6440

PREAMBLE DATA ADDRESS (B3)HEX

DATA (D[7:0]2)

Table 1. Serial Data Format

BIT

Mode—Function

Value

Parallel Mode

Input Pin

D7

D6

Y+C or CV

Select

Y+C = 1

CV = 0

CI7/DI7

Adaption

Threshold

2

AT2 = 0

or 1

CI6/DI6

D5

Adaption

Threshold

1

AT1 = 0

or 1

CI5/DI5

D4

Adaption

Threshold

0

AT0 = 0

or 1

CI4/DI4

D3

Comb

Mode

1

CM1 = 0

or 1

CI3/DI3

D2

Comb

Mode

0

CM0 = 0

or 1

CI2/DI2

D1

D0

Square Pixel/

CCIR601

Select

Sq. Pixel = 1

CCIR601 = 0

CI1/DI1

PAL

or NTSC

Select

PAL = 1

NTSC = 0

CI0/DI0

Table 2. Control Register Format D[7:0] (Serial or Parallel Mode)

STANDARD/RATE

NTSC (fSC = 3.58MHz)

PAL (fSC = 4.43MHz)

CCIR601

13.5MHz

13.5MHz

SQUARE PIXEL

12.27MHz

14.75MHz

Table 3. Clock Frequency Requirements

ADAPTION THRESHOLD D[6,5,4]

000

001

010 to 110

111

ADAPTION THRESHOLD LEVEL

Automatic threshold for minimal comb artifact generation for various video

source material.

Threshold for computer graphics applications, minimizing dot crawl on

bold lettering.

Various degrees of thresholds.

Threshold for better reproduction of natural photographic images.

Table 4. Adaption Threshold Bit Table

COMB MODE, D[3,2]

00

01

10

11

8

NTSC

Y adaptive, C comb 100% active

Y adaptive, C adaptive

Y 100% comb active, C 100% comb active

Bandsplitting only (no combing)

PAL

Y adaptive, C adaptive

Y adaptive, C comb 100% active

Y 100% comb active, C 100% comb active

Not recommended due reduced performance

Bandsplitting only (no combing)

Table 5. Comb Mode Bit Table

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