MTV048 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

MTV048

On-Screen-Display Controller for CRT/LCD Monitor

Unspecified 

MYSON

TECHNOLOGY

MTV048

(Rev 0.9)

3.3V Regulator Capacitor connection. Connect a decoupling

V33CAP

I/O

11 capacitor to VSS pin when DC supply = 5V, or connect to 3.3V

directly when DC supply = 3.3V.

FBKG

O

12

Fast Blanking output. It is used to cut off external R, G, B signals

of VGA while this chip is displaying characters or windows.

BOUT

O

13

Blue color output. It is a blue color video signal output. And it is a

DAC output if bit LCD = 0 or CMOS output if bit LCD =1.

GOUT

O

14

Green color output. It is a green color video signal output. And it is

a DAC output if bit LCD = 0 or CMOS output if bit LCD =1.

ROUT

O

15

Red color output. It is a red color video signal output. And it is a

DAC output if bit LCD = 0 or CMOS output if bit LCD =1.

VSS

-

16 Digital ground. This ground pin is used for internal digital circuitry.

3.0 FUNCTIONAL DESCRIPTIONS

3.1 Serial Data Interface

The serial data interface receives data transmitted from an external controller. There are 2 types of buses,

which can be accessed through the serial data interface. One is SPI bus and the other is I2C bus.

3.1.1 SPI bus

While SSB pin is pulled to "high" or "low" level, the SPI bus operation is selected. And a valid transmission

should start pulling SSB to "low" level, enabling MTV048 to receiving mode, and retain at "low" level

till the last cycle for a complete data packet transfer. The protocol is shown in Figure 1.

SSB

SCK

SDA

MSB

LSB

First byte

Last byte

FIGURE 1. Data Transmission Protocol (SPI)

There are three transmission formats, shown as below:

Format (a) R - C - D → R - C - D → R - C - D … ..

Format (b) R - C - D → C - D → C - D → C - D … ..

Format (c) R - C - D → D → D → D → D → D … ..

Where R=Row address, C=Column address, D=Display data

3.1.2 I2C bus

I2C bus operation is only selected when SSB pin is left floating. And a valid transmission should start writing

the slave address 7AH to MTV048. The protocol is shown in Figure 2.

Rev 0.9

-3-

2001/03/15

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