Functional Description
2.11.67 VDP TTX Filter Control Register
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Default |
| 00h |
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7 | 6 | 5 | 4 |
| 3 | 2 | 1 | 0 | ||
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| Reserved |
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| 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 |