CS7654 datasheet(21/62 Pages) CIRRUS

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CS7654

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.

309

310

311

Analog

Field 1

Burst Phase = 135 degrees relative to U

Burst Phase = 225 degrees relative to U

312

313

309

Analog

Field 2

308

311

312

VSYNC Drops

310

309

310

311

Analog

Field 3

312

313

309

Analog

Field 4

308

311

312

310

Figure 8. PAL Video Non-Interlaced Progressive Scan Timing

System

Fsubcarrier

Value (hex)

NTSC-M, NTSC-J

3.5795455 MHz

43E0F83E

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

4.43361875 MHz

54131596

PAL-N (Argentina)

3.582056 MHz

43ED288D

PAL-M

3.579611 MHz

43CDDFC7

Table 4.

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