NT68275 View Datasheet(PDF) - Novatek Microelectronics

Part Name

Description

Manufacturer

NT68275

IIC Bus Controlled On-Screen Display

Novatek Microelectronics 

NT68275

IIC Bus Controlled On-Screen Display

Features

n IIC Bus Interface with Slave Address $7A (Transmitter)

& $7B (Receiver)

n Horizontal Frequency Range: 30KHz ~ 150KHz*

n Flexible Display Resolution Up to 1524 Dots/Row

n Internal PLL Generates a Stable and Wide-Ranged

System Clock (120 MHz)*

n OSD Screen Consist Character Array of 15 Rows by

30 Columns

n Programmable Vertical and Horizontal Position for

OSD Displaying Center

n Total of 528* ROM Fonts including 512* Standard &

16 Multi-color ROM Fonts.

n 12 X 18 Dot Matrix Per Character

n 8-Color Selection for Each Character

n 7-Color Selection for Each Character Background

n Character/Symbol Blinking, Shadowing & Bordering

Display Effect

n Double Character Height and Width for Each Row

n Programmable Height of Character/Symbol Display

n Row To Row Spacing Control to Avoid Expansion

Distortion

n Four Programmable Windows with Overlapping

Capability and Shadowing Effect

n Color Setting for Windows’ Background and Character

Shadowing & Bordering

n Fade-In/Out Effect of OSD Screen Display

n Hsync & Vsync Input Polarity Selectable

General Description

NT68275 is designed for displaying symbols and

characters onto a CRT monitor. Its operation is controlled

by a microcontroller with an IIC bus interface. By sending

proper data and commands to NT68275, it can carry out

the full screen display automatically with the time base

generated by an on-chip PLL circuit. There are many

functions provided by this chip to fully support user

applications, such as: adjustment of the position of OSD

The “ * “ sign denotes that feature different from NT6827.

windows , built-in 512* ROM & 16 multi-color fonts,

variable character height with row-to-row spacing

adjustment, 8 color selections & 7 background color

controls for each character, double height/width controls

for each row, 4 overlapping window available with color &

size controls, size controls for each window shadowing,

color selection for windows’ shadowing & character

shadowing/ bordering, fade-in/out display effect, etc.

1

V1.0

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