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GC4016 Datasheet, PDF (40/83 Pages) Texas Instruments – MULTI-STANDARD QUAD DDC CHIP
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GC4016 MULTI-STANDARD QUAD DDC CHIP
DATA SHEET REV 1.0
5.3 CFIR COEFFICIENT PAGES
The user programmable filter CFIR coefficients are stored using pages 0 and 1 for channel A, pages 8 and 9 for channel B,
pages 16 and 17 for channel C, and pages 24 and 25 for channel D.
Table 13: CFIR Coefficient Pages
Address
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Pages 0, 8, 16, or 24
Description
h0 LSBs (end or first tap)
h0 MSBs (end or first tap)
h1 LSBs
h1 MSBs
h2 LSBs
h2 MSBs
h3 LSBs
h3 MSBs
h4 LSBs
h4 MSBs
h5 LSBs
h5 MSBs
h6 LSBs
h6 MSBs
h7 LSBs
h7 MSBs
Pages 1, 9, 17, or 25
Description
h8 LSBs
h8 MSBs
h9 LSBs
h9 MSBs
h10 LSBs (center tap)
h10 MSBs (center tap)
unused
Coefficient h0 is the first coefficient and coefficient h10 is the center coefficient of the filter’s impulse response. The 16 bit 2’s
complement coefficients are stored in two bytes, least significant byte first, for example, the LSBs of coefficient 0 are stored in
address 16 and the MSBs in address 17.
TO LOAD A COEFFICIENT THE USER MUST WRITE THE LSBYTE FIRST FOLLOWED BY THE MSBYTE. Unknown
values will be written into the LSBs if the MSB is written first. The coefficient registers are read/write.
5.4 PFIR COEFFICIENT PAGES
The user programmable filter PFIR coefficients are stored using pages 2, 3, 4 and 5 for channel A, pages 10, 11, 12 and 13
for channel B, pages 18, 19, 20 and 21 for channel C, and pages 26, 27, 28 and 29 for channel D.
Table 14: PFIR Coefficient Pages
Address
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Pages 2, 10, 18, or 26
Description
h0 LSBs (end tap)
h0 MSBs (end tap)
h1 LSBs
h1 MSBs
h2 LSBs
h2 MSBs
h3 LSBs
h3 MSBs
h4 LSBs
h4 MSBs
h5 LSBs
h5 MSBs
h6 LSBs
h6 MSBs
h7 LSBs
h7 MSBs
Pages 3, 11, 19, or 27
Description
h8 LSBs
h8 MSBs
h9 LSBs
h9 MSBs
h10 LSBs
h10 MSBs
h11 LSBs
h11 MSBs
h12 LSBs
h12 MSBs
h13 LSBs
h13 MSBs
h14 LSBs
h14 MSBs
h15 LSBs
h15 MSBs
Pages 4, 12, 20, or 28
Description
h16 LSBs
h16 MSBs
h17 LSBs
h17 MSBs
h18 LSBs
h18 MSBs
h19 LSBs
h19 MSBs
h20 LSBs
h20 MSBs
h21 LSBs
h21 MSBs
h22 LSBs
h22 MSBs
h23 LSBs
h23 MSBs
Pages 5, 13, 21, or 29
Description
h24 LSBs
h24 MSBs
h25 LSBs
h25 MSBs
h26 LSBs
h26 MSBs
h27 LSBs
h27 MSBs
h28 LSBs
h28 MSBs
h29 LSBs
h29 MSBs
h30 LSBs
h30 MSBs
h31 LSBs (center tap)
h31 MSBs (center tap)
© GRAYCHIP,INC.
- 35 -
August 27, 2001
This document contains information which may be changed at any time without notice
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