¡ Semiconductor

MSM7652

1

¡ Semiconductor

MSM7652

NTSC/PAL Digital Video Encoder

GENERAL DESCRIPTION

The MSM7652 is a digital NTSC/PAL encoder. By inputting digital image data conforming to

ITU Rec. 656 or ITURBT 601, it outputs selected analog composite video signals, analog S video

signals or Y, R-Y, B-Y signals. For the scanning system, interlaced or noninterlaced mode can be

selected.

Since the MSM7652 is provided with pins dedicated to overlay function, text and graphics can

be superimposed on a video signal.

In addition, this encoder has an internal 10-bit DAC. So, when compared with using a conventional

analog encoder, the number of components, the board space, and points of adjustment can

greatly be reduced, thereby realizing a low cost and high-accuracy system.

The MSM7652 provides the optional functions such as Closed Caption Signal Generation

Function.

interconnections between this encoder and mounting components.

The internal synchronization signal generator (SSG) allows the MSM7652 to operate in master

mode.

FEATURES

• Video signal system: NTSC/PAL

• Scanning system: interlaced/noninterlaced (NTSC : 262 lines/PAL : 312 lines)

• Input digital level: conforms to ITU-R601 (CCIR601)

• Input-output timing: conforms to ITU Rec. 656 or ITURBT 624-4

• Input signal sampling ratio : Y:Cb:Cr = 4:2:2

• Supported input formats

·

ITU Rec. 656

·

YCbCr 27 MHz format (8-bit input)

·

ITU-R601 13.5 MHz (8-bit (Y) + 8-bit (CbCr) input)

• Output video signals

·

NTSC/PAL composite video signals and S video signals

·

Y, R-Y, B-Y analog signals (selectable)

• Sampling frequency : 27 MHz

• Internal SSG circuit (Can operate as a master in other operation modes than CCIR Rec. 656

mode)

• Internal 3ch 10-bit DAC

• 3-bit title graphics can be displayed

• Color bar function

• 3.3 V single power supply (each I/O pin is 5 V tolerable)

• Closed caption function

• Package

56-pin plastic QFP (QFP56-P-910-0.65-2K)

(Product name: MSM7652GS-2K)

This version: Jun. 1998