Texas Instruments TVP5147M1PFP manual VDP TTX Filter Control Register

Models: TVP5147M1PFP

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2.11.67 VDP TTX Filter Control Register

Functional Description

2.11.67 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]: 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 = 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.

62

TVP5147M1PFP

SLES140A—March 2007

Page 70
Image 70
Texas Instruments TVP5147M1PFP manual VDP TTX Filter Control Register