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MTV118 Revision 2.0 01/01/1999

MTV118

MYSON

TECHNOLOGY

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 bus

3.1.1 SPI Bus

When the SSB pin is pulled to a HIGH or LOW level, the SPI bus operation is selected. A valid trans-

mission should start from pulling SSB to LOW level, enabling the MTV118 receiving mode and retaining

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

on page 4.

There are 3 transmission formats as shown 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

R=row address, C=column address, D=display data

PWM3

O

-

12

Open-Drain PWM D/A Converter 3. The output pulse width is

programmable by the register of row 15, column 22.

PWM4

O

-

13

Open-Drain PWM D/A Converter 4. The output pulse width is

programmable by the register of row 15, column 23.

PWM5

O

-

14

Open-Drain PWM D/A Converter 5. The output pulse width is

programmable by the register of row 15, column 24.

PWM6

O

-

15

Open-Drain PWM D/A Converter 6. The output pulse width is

programmable by the register of row 15, column 25.

PWM7

O

-

16

Open-Drain PWM D/A Converter 7. The output pulse width is

programmable by the register of row 15, column 26.

VDD

-

9

17

Power Supply. Positive 5 V DC supply for internal circuitry and a

0.1uF decoupling capacitor should be connected across VDD and

VSS.

VFLB

I

10

18

Vertical Input. This pin is used to input the vertical synchronizing

signal. It is triggered by lead and has an internal pull-up resistor.

HTONE /

PWMCK

O

11

19

Half Tone Output / PWM Clock Output. This is a multiplexed pin

selected by the PWMCK bit. This pin can be a PWM clock or used

to attenuate R, G, B gain of VGA for the transparent windowing

effect.

FBKG

O

12

20

Fast Blanking Output. It is used to cut off external R, G, B sig-

nals of VGA while this chip is displaying characters or windows.

BOUT

O

13

21

Blue Color Output. This is a blue color video signal output.

GOUT

O

14

22

Green Color Output. This is a green color video signal output.

ROUT

O

15

23

Red Color Output. This is a red color video signal output.

VSS

-

16

24

Ground. This ground pin is used for internal circuitry.

Name

I/O

Pin #

Descriptions

N16

N24