LC74735YW datasheet(1/52 Pages) ONSEMI

Il numero della parte	LC74735YW

Spiegazioni elettronici	Mini Buck Converter for RF Power Amplifiers

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Produttore elettronici	ONSEMI [ON Semiconductor]

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hk 20110413-S00004/ O1003TN(OT) No.A2330-1/52

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Semiconductor Components Industries, LLC, 2013

July, 2013

LC74735YW

Overview

The LC74735YW is an on-screen display CMOS IC that displays characters and patterns on a TV screen. For

QVGA display, the LC74735YW supports the use of both a 12

 18 dot character font and a 12  18 dot graphics

font with 16 colors with a total of 512 characters and glyphs. For WVGA display, the LC74735YW supports the use

of both a 24

 32 dot character font and a 12  16 dot graphics font with 16 colors with a total of 512 characters and

glyphs. The LC74735YW can also implement extremely varied displays by the use of an external ROM. The

LC74735YW supports both QVGA (480

 234) and WVGA (800  480).

Features

 Screen structure

— Main :

QVGA mode: 40 characters

13 lines (up to 520 characters) on a QVGA panel

WVGA mode: 33 characters

15 lines (up to 495 characters) on a WVGA panel

— Wallpaper display screen: Permanent repetition of a 2

2 (horizontal vertical) character pattern

 Character structure

— QVGA mode :

12 dots (horizontal)

18 dots (vertical) : Character display

12 dots (horizontal)

18 dots (vertical) : Graphic glyph display

— WVGA mode:

24 dots (horizontal)

32 dots (vertical) : Character display

12 dots (horizontal)

16 dots (vertical) : Graphic glyph display (1 pixel : 2 2 dots)

— Character display clock:

About 9 MHz — QVGA with an LC oscillator 33.2 MHz (maximum: 40 MHz)

WVGA with an external clock signal input

*: The ROM image is known when QVGA or WVGA mode is specified.

 Number of characters: 512 (internal)

Up to 2048 characters when an external 16-bit 4M ROM is used.

 Character sizes: Four horizontal sizes (1, 2, 3, and 4)

Four vertical sizes (1

, 2, 3, and 4)

(The character size is specified in line units.)

 Display start positions : 512 positions in the horizontal direction and 256 positions in the vertical direction.

QVGA mode WVGA mode Setting units : Horizontal : 1 dot 2 dots (In screen units)

Vertical: 1 dot 2 dots (In screen units)

 Display functions

— Blinking specification (in character units)

Period : 1/64, 1/32, and 1/16 of the vertical sync signal (in screen units)

Duty : Fixed at 50%

— Box (raised or recessed) display

Raised/recessed specification (in character units)

Left

: Off/on specification (in character units)

Right

: Off/on specification (in character units)

Top

: Off/on specification (in character units)

Bottom : Off/on specification (in character units)

— Border specification (in line units) :

Only valid with glyphs from the character font.

 Color specification

Character

— Character color (in character units) : 1 of 16 colors can be specified.

— Character background color (in character units) : 1 of 16 colors can be specified.

— Border color (in line units) : 1 of 16 colors can be specified.

CMOS LSI

On-Screen Display Controller

Ordering number : ENA2330

SQFP80(12X12)

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