DS90UH929-Q1 Datasheet, PDF (64/77 Pages) Texas Instruments – 720p HDMI to FPD-Link III Bridge Serializer with HDCP

DS90UH929-Q1
SNLS458 – NOVEMBER 2014
Typical Applications (continued)
Mobile Device
/Graphics
Processor
HDMI
V_DDIO
1.8V
1.1V
IN_CLK+
IN_D0+
IN_D1+
IN_D2+
CEC
DDC
HPD ₄
GPIO /
I2C_SCL
I2C_SDA
IDx
DOUT+
DOUT-
DS90UH929-Q1
Serializer
DAP
www.ti.com
FPD-Link III
1 Pair /AC Coupled
PDB
OSS_SEL
OEN
MODE_SEL
INTB_IN
SCL
SDA
IDx
V_DDIO
3.3V 1.8V or 3.3V
RIN+
RIN-
R[7:0]
G[7:0]
B[7:0]
HS
VS
DE
PCLK
RGB Display
720p
24-bit color depth
DS90UH926Q-Q1
Deserializer
LOCK
PASS
3
/
I2S AUDIO
(STEREO)
MCLK
DAP
HDCP ± High-Bandwidth Digital Content Protection
TMDS ± Transition-Minimized Differential Signaling
HDMI ± High Definition Multimedia Interface
Figure 23. Typical System Diagram
9.2.1 Design Requirements
The SER/DES supports only AC-coupled interconnects through an integrated DC-balanced decoding scheme.
External AC coupling capacitors must be placed in series in the FPD-Link III signal path as illustrated in
Figure 24.
Table 9. Design Parameters
DESIGN PARAMETER
VDDIO
AC Coupling Capacitor for DOUT0± and DOUT1± with 92x
deserializers
AC Coupling Capacitor for DOUT0± and DOUT1± with 94x
deserializers
EXAMPLE VALUE
1.8V
100nF
33nF
For applications utilizing single-ended 50Ω coaxial cable, the unused data pins (DOUT-) should utilize a 15nF
capacitor and should be terminated with a 50Ω resistor.
SER
D_OUT+
D_OUT-
R_IN+
R_IN-
DES
Figure 24. AC-Coupled Connection (STP)
SER
D_OUT+
R_IN+
DES
D_OUT-
503
503
R_IN-
Figure 25. AC-Coupled Connection (Coaxial)
For high-speed FPD–Link III transmissions, the smallest available package should be used for the AC coupling
capacitor. This will help minimize degradation of signal quality due to package parasitics.
64
Submit Documentation Feedback
Product Folder Links: DS90UH929-Q1
Copyright © 2014, Texas Instruments Incorporated