Datasheet

TVP5147M1

SLES140G –JULY 2005–REVISED FEBRUARY 2012

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Table 2-14. AFE Gain Control Register

Subaddress 01h

Default 0Fh

7 6 5 4 3 2 1 0

Reserved 1 1 AGC chroma AGC luma

Bit 3: 1b must be written to this bit

Bit 2: 1b must be written to this bit

AGC chroma enable:

Controls automatic gain in the chroma/PbPr channel

0 = Manual (if AGC luma is set to manual, AGC chroma is forced to be in manual)

1 = Enabled auto gain, applied a gain value acquired from the sync channel for S-video and component mode. When AGC luma

is set, this state is valid. (default)

AGC luma enable:

Controls automatic gain in the embedded sync channel of CVBS, S-video, component video

0 = Manual gain, AFE coarse and fine gain frozen to the previous gain value set by AGC when this bit is set to 0.

1 = Enabled auto gain applied to only the embedded sync channel (default)

These settings affect only the analog front-end (AFE). The brightness and contrast controls are not affected by these settings.

Table 2-15. Video Standard Select Register

Subaddress 02h

Default 00h

7 6 5 4 3 2 1 0

Reserved Video standard [2:0]

Video standard [2:0]:

CVBS and S-Video Component Video

000 Autoswitch mode (default) Autoswitch mode (default)

001 (M, J) NTSC Interlaced 525

010 (B, D, G, H, I, N) PAL Interlaced 625

011 (M) PAL Reserved

100 (Combination-N) PAL Reserved

101 NTSC 4.43 Reserved

110 SECAM Reserved

111 PAL 60 Reserved

With the autoswitch code running, the user can force the decoder to operate in a particular video standard mode by writing the appropriate

value into this register. Changing these bits causes the register settings to be reinitialized.

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