TMDS171 Datasheet, PDF (32/62 Pages) Texas Instruments – 3.4 Gbps TMDS RETIMER

TMDS171, TMDS171I
SLLSEN7A – OCTOBER 2015 – REVISED DECEMBER 2015
www.ti.com
8.5.5 CSR BIT Field Definitions – Misc Control (offset: 00001010) (reset: B1h)
Figure 33. CSR Bit Field Definitions – Misc Control (0Ah)
7
6
5
4
3
2
1
0
1
0
1
1
0
0
0
1
R/W
R/W
R/W
R/W
R
W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset, S= Set, U = autonomously update
Table 9. CSR Bit Field Definitions – Misc Control (0Ah)
Bit Field
7
Application Mode Selection
6
HPDSNK_GATE_EN
5
EQ_ADA_EN
4
EQ_EN
3
Reserved
2
APPLY_RXTX_CHANGES
1:0 DEV_FUNC_MODE.
Type
R/W
Reset
1’b1
R/W
1’b0
R/W
1’b1
R/W
1’b1
R
1’b0
W
1’b0
R/W
2’b01
Description
See Mode Selection
TMDS171
0 – Source
1 – Sink (Default)
Swaps the input Data and Clock lanes polarity. The field set the
HPD_SNK signal pass through to HPD_SRC or not and
HPD_SRC whether held in the de-asserted state.
0 – HPD_SNK passed through to the HPD_SRC ( default )
1 – HPD_SNK will not pass through to the HPD_SRC.
This field enable the equalizer functioning state; Writes are
ignored when I2C_EN/PIN = 0
0 – Fixed EQ
1 – Adaptive EQ (default)
This field enable the Equalizer; Writes are ignored when
I2C_EN/PIN = 0
0 -- EQ disable
1 – EQ enable (default)
Reserved
Self-clearing write-only bit.
Writing a 1 to this bit will apply new TX_TERM, HDMI_TWPST1,
EQ_EN, EQ_ADA_EN, VSWING, Fixed EQ value settings to the
clock and data lanes. Writes to the respective registers do not
take immediate effect.
This bit does not need to be written if I²C configuration occurs
while OE or HPD_SNK are low, I2C PD_EN=1 or there is no
HDMI clock applied and SIG_EN is high.
This field selects the Device Working Function Mode.
00 – Redriver Mode across full range 250 Mbps – 3.4 Gbps
01 - Automatic Redriver to Retimer Cross Over at 1.0 Gbps
(default)
10 - Reserved
11 - Retimer Mode across full range 250 Mbps – 3.4 Gbps
When changing crossover point, need to toggle PD_EN or
toggle external HPD_SNK.
32
Submit Documentation Feedback
Product Folder Links: TMDS171
Copyright © 2015, Texas Instruments Incorporated