TDA19978B datasheet(9/38 Pages) NXP

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TDA19978B_2

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Product data sheet

Rev. 02 — 10 May 2010

9 of 38

NXP Semiconductors

TDA19978B

Quad HDMI 1.3a receiver with digital processing

[1]

P = power supply; G = ground; I = input; O = output and I/O = input/output.

[2]

Connected to the ground of the HDMI receiver (VSSH) in normal operation.

Functional description

The TDA19978B converts digital data streams input by the HDMI sources into parallel

digital data for use by media and video signal processing integrated circuits in 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”.

8.1 Software drivers

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.

8.2 HDMI inputs

Control of the four HDMI inputs can be automatic using activity detection or using the

I2C-bus. The HDMI receiver inputs are defined by pins RXx0+, RXx0

−, RXx1+, RXx1−,

RXx2+, RXx2

−, RXxC+, RXxC−, RRX1, RRX2, HSCLx and HSDAx (x equals A, B, C or D

as applicable).

8.3 Termination resistance control

The HDMI receiver input contains a termination resistance control set by an external

resistor connected between pins RRXx and VDDH(3V3) (x equals 1 for inputs A and B or 2

for inputs C and D). Typically, the characteristic impedance is 50

Ω and the default value

of the external terminal control resistor is 12 k

Ω ± 1 %.

HSCLC

139

HDMI input C DDC-bus serial clock

HSDAD

140

I/O

HDMI input/output D DDC-bus serial data

HSCLD

141

HDMI input D DDC-bus serial clock

VDDI(3V3)

142

digital inputs supply voltage; 3.3 V

RRX2

143

HDMI inputs C and D termination resistance control

VDDH(1V8)

144

HDMI receiver supply voltage; 1.8 V

Exposed die pad

exposed die pad; connect to digital core ground (VSSC)

Table 3.

Pin description …continued

Symbol

Type[1] Description

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