CS7654 Просмотр технического описания (PDF) - Cirrus Logic

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CS7654

CCD Color-Space Processor with Analog Output

Cirrus Logic 

CS7654

VSYNC Drops

Analog

Field 1

309 310 311 312 313 1

2

3

4

5

Analog

Field 2

6

7

308 309 310 311 312 1

2

3

4

5

6

7

23

24

23

24

Analog

Field 3

309 310 311 312 313 1

2

3

4

5

Analog

Field 4

6

7

23

24

308 309 310 311 312 1

2

3

4

5

6

7

23

24

Burst Phase = 135 degrees relative to U

Burst Phase = 225 degrees relative to U

Figure 8. PAL Video Non-Interlaced Progressive Scan Timing

System

NTSC-M, NTSC-J

PAL-B, D, G, H, I, N

PAL-N (Argentina)

PAL-M

Fsubcarrier

3.5795455 MHz

4.43361875 MHz

3.582056 MHz

3.579611 MHz

Table 4.

Value (hex)

43E0F83E

54131596

43ED288D

43CDDFC7

tion PAL EBU color bars. For PAL color bars, the

CS7654 generates NTSC color bar values, which

are very close to standard PAL values.

Super White/Super Black support

The ITU-R BT.601 recommendation limits the al-

lowed range for the digital video data between

0×10 - 0×EB (16 - 235 ) for luma and between

0×10 - 0×F0 (16 - 240 ) for the chrominance values.

This chip will clip any digital input value which is

out of this range to conform to the ITU-R BT.601

specifications.

However for some applications it is useful to allow

a wider input range. By setting the CLIP_OFF bit

(CONTROL_6 register at Station Address 0x00)

the allowed input range is extended between 0×01

- 0×FE ( 1 - 254 ) for both luma and chrominance

values.

21

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