Functional Description
1P1[3] |
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D1[3] | 1M1[3] |
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1P1[2] |
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D1[2] | 1M1[2] |
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1P1[1] |
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D1[1] | 1M1[1] |
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1P1[0] |
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D1[0] | 1M1[0] |
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| NIBBLE 1 |
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D2[3:0] |
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1P2[3:0] | NIBBLE 2 |
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1M2[3:0] |
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| PASS 1 | |
D3[3:0] |
| Filter 1 | |
1P3[3:0] | NIBBLE 3 | ||
Enable | |||
1M3[3:0] |
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D4[3:0] |
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1P4[3:0] | NIBBLE 4 |
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1M4[3:0] |
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D5[3:0] |
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1P5[3:0] | NIBBLE 5 |
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1M5[3:0] |
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| FILTER 1 | |
D1..D5 |
| PASS 2 | |
2P1..2P5 |
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| FILTER 2 | ||
2M1..2M5 |
| Filter 2 | |
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| Enable |
00
01
PASS
10
11
2
Filter Logic
Figure 2−19. Teletext Filter Function
2.11.68 VDP FIFO Word Count Register
Subaddress
BCh
Read only
7
6
5
4
3
2
1
0
FIFO word count [7:0]
FIFO word count [7:0]: This register provides the number of words in the FIFO.
NOTE: 1 word equals 2 bytes.
TVP5147M1PFP | 63 |