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TDA8046 Datasheet, PDF (29/48 Pages) NXP Semiconductors – Multi-mode QAM demodulator
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Philips Semiconductors
Multi-mode QAM demodulator
Product specification
TDA8046
Table 4 Semi-serial format 256, 64 and 32-QAM; see note 1
SLOT
0
1
2
3
4
5
6
7
DO1
Sn-1(7)
Sn-1(5)
Sn-1(3)
Sn-1(1)
Sn(7)
Sn(5)
Sn(3)
Sn(1)
256-QAM
DO0 CLKSDV
Sn-1(6)
1
Sn-1(4)
1
Sn-1(2)
1
Sn-1(0)
1
Sn(6)
1
Sn(4)
1
Sn(2)
1
Sn(0)
1
DO1
Sn-1(5)
Sn-1(3)
Sn-1(1)
X
Sn(5)
Sn(3)
Sn(1)
X
64-QAM
DO0 CLKSDV
Sn-1(4)
1
Sn-1(2)
1
Sn-1(0)
1
X
0
Sn(4)
1
Sn(2)
1
Sn(0)
1
X
0
Note
1. The semi-serial format is only valid for demapping schemes 1, 3 and 4.
Table 5 Semi-serial format 16-QAM and 4-QAM; see note 1
SLOT
0
1
2
3
4
5
6
7
DO1
Sn-1(3)
Sn-1(1)
X
X
Sn(3)
Sn(1)
X
X
16-QAM
DO0
Sn-1(2)
Sn-1(0)
X
X
Sn(2)
Sn(0)
X
X
CLKSDV
1
1
0
0
1
1
0
0
DO1
Sn-1(1)
X
X
X
Sn(1)
X
X
X
Note
1. The semi-serial format is only valid for demapping schemes 1, 3 and 4.
DO1
Sn-1(4)
Sn-1(2)
X
X
Sn-1(0)
Sn(3)
Sn(1)
X
32-QAM
DO0 CLKSDV
Sn-1(3)
1
Sn-1(1)
1
X
0
X
0
Sn(4)
1
Sn(2)
1
Sn(0)
1
X
0
4-QAM
DO0
Sn-1(0)
X
X
X
Sn(0)
X
X
X
CLKSDV
1
0
0
0
1
0
0
0
1996 Nov 19
29
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