TLFD600 Datasheet, PDF (26/37 Pages) Texas Instruments – ADSL CODEC WITH INTEGRATED LINE DRIVER AND RECEIVER

TLFD600
ADSL CODEC WITH INTEGRATED LINE DRIVER AND RECEIVER
SLAS280B – MAY 2000 – REVISED NOVEMBER 2000
PROGRAMMING INFORMATION
PCR-RTX – programmable attenuation control register for TX channel
Address: 00100b
D7
D6
Reserved
Reserved
Contents at reset: 00000000b
D5
D4
D3
Reserved
TXPAA[4]
TXPAA[3]
D2
TXPAA[2]
D1
TXPAA[1]
D0
TXPAA[0]
Table 8. PCR-TX Attenuation Table
BIT NAME
Reserved
D7 D6 D5 D4 D3 D2 D1 D0
0
Reserved
DESCRIPTION
Reserved
Reserved
TXPAA[4]
TXPAA[3]
TXPAA[2]
TXPAA[1]
TXPAA[0]
0
Reserved
0
Reserved
0
0
0
0
0 TX PAA = 0 dB
0
0
0
0
1 TX PAA = – 1 dB
0
0
0
1
0 TX PAA = – 2 dB
0
0
0
1
1 TX PAA = – 3 dB
0
0
1
0
0 TX PAA = – 4 dB
0
0
1
0
1 TX PAA = – 5 dB
0
0
1
1
0 TX PAA = – 6 dB
0
0
1
1
1 TX PAA = – 7 dB
0
1
0
0
0 TX PAA = – 8 dB
0
1
0
0
1 TX PAA = – 9 dB
0
1
0
1
0 TX PAA = – 10 dB
0
1
0
1
1 TX PAA = – 11 dB
0
1
1
0
0 TX PAA = – 12 dB
0
1
1
0
1 TX PAA = – 13 dB
0
1
1
1
0 TX PAA = – 14 dB
0
1
1
1
1 TX PAA = – 15 dB
1
0
0
0
0 TX PAA = – 16 dB
1
0
0
0
1 TX PAA = – 17 dB
1
0
0
1
0 TX PAA = – 18 dB
1
0
0
1
1 TX PAA = – 19 dB
1
0
1
0
0 TX PAA = – 20 dB
1
0
1
0
1 TX PAA = – 21 dB
1
0
1
1
0 TX PAA = – 22 dB
1
0
1
1
1 TX PAA = – 23 dB
1
1
0
0
0 TX PAA = – 24 dB
–
–
–
–
– See Note 6
NOTE 6. Performance of the codec for invalid combination of bits is not guaranteed and such combinations should not be used.
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