GS4911B datasheet(11/119 Pages) SEMTECH

部件名	GS4911B

功能描述	HD/SD/Graphics Clock and Timing Generator with GENLOCK

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制造商	SEMTECH [Semtech Corporation]

网页	http://www.semtech.com

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11 / 119 page

GS4911B/GS4910B HD/SD/Graphics Clock and Timing

Generator with GENLOCK

Data Sheet

36655 - 5

June 2009

11 of 119

9

CORE_GND

–

Power

Supply

Ground connection for core and I/O. Solder to the ground plane of

the application board.

NOTE: The CORE_GND pin should be soldered to the same main

ground plane as the exposed ground pad on the bottom of the

device.

10

ANALOG_VDD

–

Power

Supply

Most positive power supply connection for the analog input block.

Connect to +1.8V DC.

11, 20, 63NC

––

Do not connect.

12

ANALOG_GND

–

Power

Supply

Ground connection for the analog input block. Connect to GND.

13

AUD_PLL_GND

(GS4911B only)

–Power

Supply

Ground connection for the audio clock synthesis internal block.

Connect to GND.

ANALOG_GND

(GS4910B only)

–Power

Supply

Ground connection for the analog input block. Connect to GND.

14

AUD_PLL_VDD

(GS4911B only)

–Power

Supply

Most positive power supply connection for the audio clock synthesis

internal block. Connect to +1.8V DC.

ANALOG_GND

(GS4910B only)

–Power

Supply

Ground connection for the analog input block. Connect to GND.

15

10FID

Non

Synchronous

Input

REFERENCE SIGNAL INPUT

Signal levels are LVCMOS/LVTTL compatible.

The 10FID external reference signal is applied to this pin by the

application layer. 10FID defines the field in which the video and

audio clock phase relationship is defined according to SMPTE

318-M. It is also used to define a 3:2 video cadence.

NOTE: If the input reference format does not include a 10 Field ID

signal, this pin should be held LOW. See Section 3.4.2 on page 44.

16

HSYNC

Non

Synchronous

Input

REFERENCE SIGNAL INPUT

Signal levels are LVCMOS/LVTTL compatible.

The HSYNC external reference signal is applied to this pin by the

application layer. When the GS4911B/GS4910B is operating in

Genlock mode, the device senses the polarity of the HSYNC input

automatically, and references to the leading edge.

If the user wishes to select one of the pre-programmed video and/or

timing output signals provided by the device, then this signal must

adhere to one of the 36 defined video or 16 different graphics

display standards supported by the device. In this mode of

operation, the HSYNC input provides a horizontal scanning

reference signal.

The HSYNC signal may have analog timing, such as from a sync

separator, or may be digital such as from an SDI deserializer.

Section 1.4 on page 20 describes the 36 video formats and 16

graphic formats recognized by the GS4911B/GS4910B.

Table 1-1: Pin Descriptions (Continued)

Number

Name

Timing

Type

Description

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