Datasheet

SLES084C − August 2007 TVP5146

2.11.64 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 enable TTX filter 1 enable

Filter logic [1:0]: Allows 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 = Disabled (default)

1 = Enabled

TTX filter 1 enable: Provides for enabling the teletext filter function within the VDP.

0 = Disabled (default)

1 = Enabled

If the filter matches or if the filter mask is all 0s, then a true result is returned.