tda19977a NXP Semiconductors, tda19977a Datasheet - Page 10

• Manufacturer Part Number: tda19977a
• Description: Triple Input Hdmi 1.3a Compliant Receiver Interface With Equalizer Up To 1080p For Hdtv, And Uxga For Pc Formats
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TDA19977A_TDA19977B_1
Product data sheet
8.1 Software drivers
8.2 HDMI inputs
8.3 Termination resistance control
Table 3.
[1]
[2]
[3]
The TDA19977A; TDA19977B converts digital data streams input by the HDMI sources
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
with or without HDCP (TDA19977A only) protection.
Outputs from the TDA19977A; TDA19977B 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
TDA19977A; TDA19977B comprises a color space conversion block, downsampling filters
and an embedded timing code function. In addition, the HDCP (TDA19977A only)
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 TDA19977A;
TDA19977B. 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, HDCP (TDA19977A only) and
InfoFrame notification.
Control of the three HDMI inputs can be automatic using activity detection or using the
I
RXx2+, RXx2 , RXxC+, RXxC , RRXx, HSCLx and HSDAx. In the pin names, x equals A,
B or C (as applicable).
The HDMI receiver input contains a termination resistance control set by an external
resistor connected between pins RRXx and V
and B or 2 for inputs C and D. Typically, the characteristic impedance is 50
default value of the external terminal control resistor is 12 k
Symbol
HSCLC
n.c.
n.c
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
HDCP decoding is only supported by TDA19977A.
Pin description
Pin
139
140
141
142
143
144
-
Rev. 01 — 7 August 2008
…continued
Triple input HDMI receiver interface with digital processing
Type
I
I/O
I
P
I
P
G
[1]
TDA19977A; TDA19977B
Description
HDMI input C (HDCP
not connected
not connected
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
SSH
DDH(3V3)
) in normal operation.
. In RRXx, x equals 1 for inputs A
[3]
) DDC-bus serial clock
1 %.
© NXP B.V. 2008. All rights reserved.
and the
SSC
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