Datasheet

TVP5147M1

SLES140G –JULY 2005–REVISED FEBRUARY 2012

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Table 2-88. VDP TTX Filter Control Register

Subaddress BBh

Default 00h

7 6 5 4 3 2 1 0

Reserved Filter logic [1:0] Mode TTX filter 2 TTX filter 1

enable enable

Filter logic [1:0]:

Allow different logic to be applied when combining the decision of Filter 1 and Filter 2 as follows:

00 = NOR (default)

01 = NAND

10 = OR

11 = AND

Mode:

Indicates which teletext mode is in use:

0 = Teletext filter applies to 2 header bytes (default)

1 = Teletext filter applies to 5 header bytes

TTX filter 2 enable:

Provides for enabling the teletext filter function within the VDP.

0 = Disable (default)

1 = Enable

TTX filter 1 enable:

Provides for enabling the teletext filter function within the VDP.

0 = Disable (default)

1 = Enable

If the filter matches or if the filter mask is all zeros, then a true result is returned.

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