TMDS261B Datasheet, PDF (40/48 Pages) Texas Instruments – TWO-PORT HDMI SWITCH

TMDS261B
SLLS987A – SEPTEMBER 2009 – REVISED JULY 2011
www.ti.com
Step 8
I²C general address (master)
7
6
5
4
3
2
1
0
0
1
0
1
1
0
0
1
Step 9
8
I²C acknowledge (slave)
A
Step 10
I²C read data (slave)
7
Data
6
Data
5
Data
4
Data
3
Data
2
Data
1
Data
0
Data
Where Data is determined by the logic values contained in the internal registers.
Step 11A
8
I²C acknowledge (master)
A
If Step 11A is executed, go to step 10. If Step 11B is executed, go to Step 12.
Step 11B
8
I²C not acknowledge (master)
A
Step 12
0
I²C stop (master)
P
Table 8. I²C Register 0x01 Lookup Table
BIT VALUE STATE DEFAULT
7:6 Bit 7 Bit 6
Port Select I²C Mode
DESCRIPTION
1
1
X
Port 1 is selected as the active port; HPD on non-selected ports is low. HPD1 can go low, high
or high-Z.
1
0
Port 2 is selected as the active port; HPD on non-selected ports is low. HPD2 can go low, high
or high-Z.
0
0
Disallowed (indeterminate state, all terminations are disconnected)
0
1
Standby mode: HPD[1:2] follows HPD_SINK.
5:4 Bit 4 Bit 3
OVS Control
0
0
1
3:2 Bit 3
0
1
1
Bit 2
OVS2: DDC sink-side V_OL and V_IL offset range 2: V_{IL2 (max)}: 0.4 V, V_{OL2 (max)}: 0.6 V
X
OVS3: DDC sink-side V_OL and V_IL offset range 3: V_{IL3 (max)}: 0.3 V, V_{OL3 (max)}: 0.5 V
OVS1: DDC sink-side V_OL and V_IL offset range 1: V_{IL1 (max)}: 0.4 V, V_{OL1 (max)}: 0.7 V
Output Edge Rate Control
1
1
Fastest TMDS output rise and fall time setting + 120 ps approximately (slowest rise and fall
time setting)
1
0
Fastest TMDS output rise and fall time setting + 100 ps approximately
0
1
Fastest TMDS output rise and fall time setting + 50 ps approximately
0
0
X
Fastest TMDS output rise and fall time setting
1:0 Bit 1 Bit 0
Power Mode
1
0
Device enters low-power mode.
1
1
Device enters low-power mode.
0
1
Reserved
0
0
X
Device is in normal-power mode.
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