TDA8046 Datasheet, PDF (34/48 Pages) NXP Semiconductors – Multi-mode QAM demodulator

Philips Semiconductors
Multi-mode QAM demodulator
Product specification
TDA8046
Table 12 I²C-bus write parameters; 3-bit values
PARAMETER
Constellation
CONC
0
0
0
0
1
BITS
CONB
0
0
1
1
0
CONA
0
1
0
1
0
4-QAM
16-QAM
32-QAM
64-QAM
256-QAM
DESCRIPTION
Table 13 Convergence step for the equalizer (DFE and FFE parts)
DSTP2 FSTP2
0
0
0
0
1
1
1
1
DSTP1 FSTP1
0
0
1
1
0
0
1
1
DSTP0 FSTP0
0
1
0
1
0
1
0
1
CONVERGENCE STEP
(LOCK = 0)
2^-13
2^-13
2^-13
2^-12
2^-12
2^-12
2^-12
2^-11
CONVERGENCE STEP
(LOCK = 1)
2^-15
2^-14
2^-13
2^-15
2^-14
2^-13
2^-12
2^-15
Table 14 I²C-bus write parameters; 4-bit values
PARAMETER
Output format
Special test
modes
OUTF
0
0
1
0
BITS
TSEL2
0
1
x
x
TSEL1
0
1
x
0
0
x
1
0
0
1
0
1
1
TSEL0
DESCRIPTION
0 8 bits in parallel
1 I/Q 8 bits multiplexed (equalizer output)
x semi-serial
1 DO7 to DO4 = carrier recovery DAC input;
DO3 to DO0 = AGC DAC input
0 DO7 to DO6 = fine AGC;
DO5 to DO0 = clock recovery DAC input
1 DO7 to DO0 = I and Q equal input
(I/Q 8 bits multiplexed format)
1 DO7 to DO0 = I and Q equal output
(I/Q 8 bits multiplexed format)
1996 Nov 19
34