Cirrus-logic CS4955 Manuel d'utilisateur télécharger pdf (Page 40)

CS4954 CS4955

40 DS278F6

Control Register 2

Address 0×02 CONTROL_2 Read/Write Default Value = 00h

Bit Number

76543210

Bit Name

OUTPUT FORMAT TTX WST TTX EN SYNC_DLY XTAL SC_EN

Default

00000000

Bit Mnemonic Function

7:5 OUTPUT FORMAT

selects the output through the DACs

000 : rgb, s-video, composite1 (6 DACs) (default)

001 : yuv, s-video, composite1 (6 DACs)

010 : s-video, composite1, composite2, (4 DACs)

011 : rgb, composite1, composite2 (5 DACs)

100 : yuv, composite1, composite2 (5 DACs)

101-111: don’t care

4TTX WST

To select between world standard (NTSC), world standard (PAL), or north

american teletext standard during NTSC or PAL modes (1 = WST TTX) (default

is 0)

In NTSC-M or PAL-M mode. This bit works in conjunction with the TV

FORMAT

0: NABTS, if TV

FORMAT is NTSC or PAL-M

1: WST (NTSC), if TV

FORMAT is NTSC or PAL-M

0: Europe TTX, if TV

FORMAT is PAL-B, G..., N

1: WST (PAL), if TV

FORMAT is PAL-B, G, ..., N

3TTX EN

Enable teletext process (1 = enable)

2 SYNC DLY

Slave mode 1 pixel sync delay (1 = enable)

1XTAL

Crystal oscillator for subcarrier adjustment enable (1 = enable)

0BU DIS

Chroma burst disable (1 = disable)

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 59 60

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Cirrus-logic CS4955 Manuel d'utilisateur Page 40