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GS1672 HD/SD-SDI Serializer with Complete SMPTE

Audio & Video Support

Data Sheet

53623 - 6

July 2011

Description

The GS1672 is a complete SDI Transmitter, generating a

SMPTE 292, SMPTE 259M-C or DVB-ASI compliant serial

digital output signal.

The integrated Narrow BW PLL allows the device to accept

parallel clocks with high input jitter, and still provide a

SMPTE compliant serial digital output.

The device can operate in four basic user selectable modes:

SMPTE mode, DVB-ASI mode, Data-Through mode, or

Standby mode.

In DVB-ASI mode, the device will perform 8b/10b encoding

prior to transmission.

In Data-Through mode, all SMPTE and DVB-ASI processing

is disabled. The device can be used as a simple parallel to

serial converter.

The device can also operate in a lower power Standby

mode. In this mode, no signal is generated at the output.

The GS1672 integrates a fully SMPTE-compliant Cable

Driver for SMPTE 259M-C and SMPTE 292 interfaces. It

features automatic dual slew-rate selection, depending on

HD or SD operational requirements.

In accordance with SMPTE 272M and SMPTE 299M, up to

eight channels (two audio groups) of serial digital audio

may be embedded into the video data stream.The input

audio signal formats supported by the device include

AES/EBU, I2C and serial audio. 16, 20 and 24-bit audio

formats are supported at 48kHz synchronous for SD modes

and 48kHz synchronous or asynchronous in HD modes.

Functional Block Diagram

Figure A: GS1672 Functional Block Diagram

Input

Mux/

Demux

DIN[19:0]

ANC Data

Insertion

TRS , Line

Number

and CRC

Insertion

EDH

Packet

Insertion

DVB-ASI

8b/10b

Encoder

F/DE

V/VSYNC

H/HSYNC

TIM_861

Parallel to Serial

Converter

Mux

SMPTE

Cable

Driver

SDO

RSET

SDO_EN/DIS

PCLK

ACLK1

ACLK2

WCLK1

WCLK2

Ain_1/2

Ain_3/4

Ain_5/6

Ain_7/8

AUDIO_INT

GRP1_EN/DIS

GRP2_EN/DIS

HANC/

VANC

Blanking

PLL with Low Noise

VCO

Narrow BW PLL

LOCKED

NRZ/NRZI

SMPTE

Scrambler

CD_VDD

CD_GND

PLL_VDD

PLL_GND

AVDD

AGND

VCO_VDD

VCO_GND

SMPTE 352M

Generation and

Insertion

HD/SD

Audio

Embedding

GSPI

Host

Interface

JTAG

Controller

20BIT/10BIT

ANC_BLANK

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