tda19978bhv NXP Semiconductors, tda19978bhv Datasheet - Page 9

• Manufacturer Part Number: tda19978bhv
• Description: Quad Hdmi 1.3a Receiver Interface With Equalizer Hdtv Up To 1080p, Up To Uxga For Pc Formats
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TDA19978B_1
Product data sheet
8.1 Software drivers
8.2 HDMI inputs
8.3 Termination resistance control
Table 3.
[1]
[2]
The TDA19978B converts HDMI digital data streams into parallel digital data for use by
media and video signal processing integrated circuits such as NXP Semiconductors’
Nexperia devices for HDTV. Data streams can be decoded without HDCP protection.
Outputs from the TDA19978B can be RGB 4:4:4, YCbCr 4:4:4, YCbCr 4:2:2 semi-planar
format based on the ITU-R BT.601 standard or YCbCr 4:2:2 based on the ITU-R BT.656
format. Inputs can be both progressive and interlaced formats. The TDA19978B
comprises a color space conversion block, downsampling filters and an embedded timing
code function. In addition, the repeater function enables other HDMI devices to be
connected to form an extended “total application”.
Software drivers are provided for easy configuration and use of the TDA19978B. These
drivers can be integrated with a large range of processors, with or without an operating
system. They control activity detection, input selection, video mode identification, color
conversion, Power-down modes and InfoFrame notification.
Control of the four HDMI inputs can be automatic using activity detection or using the
I
RXx2+, RXx2 , RXxC+, RXxC , RRX1, RRX2, HSCLx and HSDAx (x equals A, B, C or D
as applicable).
The HDMI receiver input contains a termination resistance control set by an external
resistor connected between pins RRXx and V
for inputs C and D). Typically, the characteristic impedance is 50
the external terminal control resistor is 12 k
Symbol
HSCLC
HSDAD
HSCLD
V
RRX2
V
Exposed die pad
2
C-bus. The HDMI receiver inputs are defined by pins RXx0+, RXx0 , RXx1+, RXx1 ,
DDI(3V3)
DDH(1V8)
P = power supply; G = ground; I = input; O = output and I/O = input/output.
Connected to the ground of the HDMI receiver (V
Pin description
Pin
139
140
141
142
143
144
-
Rev. 01 — 7 August 2008
…continued
Type
I
I/O
I
P
I
P
G
[1]
Description
HDMI input C DDC-bus serial clock
HDMI input/output D DDC-bus serial data
HDMI input D DDC-bus serial clock
digital inputs supply voltage; 3.3 V
HDMI inputs C and D termination resistance control
HDMI receiver supply voltage; 1.8 V
exposed die pad; connect to digital core ground (V
Quad HDMI 1.3a receiver with digital processing
SSH
DDH(3V3)
) in normal operation.
1 %.
(x equals 1 for inputs A and B or 2
TDA19978B
and the default value of
© NXP B.V. 2008. All rights reserved.
SSC
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)