DS90UH925Q-Q1 Datasheet, PDF (22/56 Pages) Texas Instruments – 720p 24-bit Color FPD-Link III Serializer with HDCP

DS90UH925Q-Q1
SNLS336J – OCTOBER 2010 – REVISED NOVEMBER 2014
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Device Functional Modes (continued)
Table 4. Configuration Select (MODE_SEL)
#
IDEAL
RATIO
V_R4/V_DD33
IDEAL V_R4
(V)
SUGGESTED SUGGESTED
RESISTOR
RESISTOR
R3 kΩ (1% tol) R4 kΩ (1% tol)
LFMODE
REPEATER
BACKWARD
COMPA-
TIBLE
I2S
CHANNEL B
(18–bit
MODE)
1
0
0
Open
40.2 or Any
L
L
L
L
2
0.164
0.541
255
49.9
L
H
L
L
3
0.221
0.729
243
69.8
L
H
L
H
4
0.285
0.941
237
95.3
H
L
L
L
5
0.359
1.185
196
110
H
L
L
H
6
0.453
1.495
169
140
H
H
L
L
7
0.539
1.779
137
158
H
H
L
H
8
0.728
2.402
90.9
243
H
L
H^*
L
LFMODE:
L = frequency range is 15 – 85 MHz (Default)
H = frequency range is 5 – <15 MHz
Repeater:
L = Repeater OFF (Default)
H = Repeater ON
Backward Compatible:
L = Backward Compatible is OFF (Default)
H = Backward Compatible is ON; DES = DS90UR906Q or DS90UR916Q or DS90UR908Q
– frequency range = 15 - 65 MHz when LFMODE = 0
– frequency range = 5 - <15 MHz when LFMODE = 1
I2S Channel B:
L = I2S Channel B is OFF, Normal 24-bit RGB Mode (Default)
H = I2S Channel B is ON, 18-bit RGB Mode with I2S_DB Enabled. Note: use of GPIO(s) on unused inputs must be enabled by register.
7.4.2 HDCP Repeater
When DS90UH925Q-Q1 and DS90UH926Q-Q1 are configured as the HDCP Repeater application, it provides a
mechanism to extend HDCP transmission over multiple links to multiple display devices. This repeater
application provides a mechanism to authenticate all HDCP Receivers in the system and distribute protected
content to the HDCP Receivers using the encryption mechanisms provided in the HDCP specification.
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