GS2960 Datasheet, PDF(56/97 Page) Semtech Corporation – 3Gb/s, HD, SD SDI Receiver Complete with SMPTE Video Processing

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GS2960 Datasheet, PDF (56/97 Pages) Semtech Corporation – 3Gb/s, HD, SD SDI Receiver Complete with SMPTE Video Processing

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Table 4-10: Supported Video Standard Codes (Continued)

SMPTE Active Video Area

Standard

RATE_

DET[1]

HD/3G

RATE_

DET[0]

SD/HD

Lines

per

Frame

Active

Lines per

Frame

Words

per

Active

Line

Words VD_STD

per Line

[5:0]

Unknown

SD/HD = 0

1Dh

Unknown

SD/HD = 1

1Eh

Unknown

SD/HD = 0

3Ch

Notes:

1. The Line Numbers in brackets refer to version zero SMPTE 352M packet locations, if they are different from version 1.

2. The part may provide full or limited functionality with standards that are not included in this table. Please consult a

Semtech technical representative.

3. For SD-SDI streams, the device can report an incorrect M value when SMPTE-352M packets are present.

NOTE: In certain systems, due to greater ppm offsets in the crystal, the âMâ bit may not

assert properly. In such cases, bits 3:0 in Register 06Fh can be increased to a maximum

value of 4.

By default (after power up or after systems reset), the four RASTER_STRUCTURE,

VD_STD, STD_LOCK and INT/PROG fields are set to zero. These fields are also cleared

when the SMPTE_BYPASS pin is LOW.

4.14 Data Format Detection & Indication

In addition to detecting the video standard, the GS2960 detects the data format, i.e. SDTI,

SDI, TDM data (SMPTE 346M), etc.

This information is represented by bits in the DATA_FORMAT_DSX register accessible

through the host interface.

Data format detection is only be carried out when the LOCKED signal is HIGH.

By default (at power up or after system reset), the DATA_FORMAT_DSX register is set to

Fh (undefined). This register is also set as undefined when the LOCKED signal is LOW

and/or the SMPTE_BYPASS pin is LOW.

Table 4-11: Data Format Register Codes

YDATA_FORMAT[3:0] or

CDATA_FORMAT[3:0]

0h ~ 05h

Data Format

SDTI

SDI

Reserved

TDM

Remarks

SMPTE 321M, SMPTE 322M,

SMPTE 326M

SMPTE 346M

GS2960 3Gb/s, HD, SD SDI Receiver Complete with

SMPTE Video Processing

Data Sheet

48003 - 6

September 2012

56 of 97

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