TLK3131_15 Datasheet, PDF (40/102 Pages) Texas Instruments – Single Channel Multi-Rate Transceiver

TLK3131
SLLS957A – DECEMBER 2008 – REVISED DECEMBER 2009
Table 2-37. SERDES_TX0_CONFIG
BIT(s)
36874.11:9
36874.8
36874.7:4
36874.3
36874.1
36874.0
ADDRESS: 0x900A
DEFAULT: 0x0001
NAME
DESCRIPTION
SWING
Transmitter Output swing control for SERDES transmitter.
Refer Table 2-40: Output Swing Control
If swing is set to 750mV or more, CM bit (36874.8) needs to be set to 1.
If swing is set to 625 mV or less, CM bit (36874.8) needs to be set to 0.
CM
1 = Applicable for SWING settings 750 mV or more.
0 = Applicable for SWING settings 625 mV or less.
DE-EMPHASIS
Transmitter Differential output De-emphasis control
Refer Table 2-39: Transmit De-emphasis Control
INVPAIR
Transmitter Polarity
1 = Inverted polarity. TXP considered negative data and TXN
considered positive data
0 = Normal polarity. TXP considered positive data and TXN considered
negative data
ENTEST
1= Enables test modes specified in TESTCFG (Register 0x9011)
ENTX
1 = Enables transmitter
0 = Disables transmitter
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ACCESS
RW
RW
RW
RW
RW
RW
Table 2-38. SERDES_TX1_CONFIG
BIT(s)
36876.11:3, 1:0
ADDRESS: 0x900C
NAME
Reserved
Reserved
DESCRIPTION
DEFAULT: 0x0001
ACCESS
RW
VALUE
0000
0001
0010
0011
0100
0101
0110
0111
Table 2-39. Transmit De-emphasis Control
AMPLITUDE REDUCTION
%
dB
0
0
4.76
–0.42
9.52
–0.87
14.28
–1.34
19.04
–1.83
23.8
–2.36
28.56
–2.92
33.32
–3.52
36874/36876[7:4]
VALUE
1000
1001
1010
1011
1100
1101
1110
1111
AMPLITUDE REDUCTION
%
dB
38.08
–4.16
42.85
–4.86
47.61
–5.61
52.38
–6.44
57.14
–7.35
61.9
–8.38
66.66
–9.54
71.42
–10.87
Value
000
001
010
011
Table 2-40. Output Swing Control
36874/36876[11:9]
Amplitude (mVdfpp)
Value
125
100
250
101
500
110
625
111
Amplitude (mVdfpp)
750
1000
1250
1375
40
Detailed Description
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