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Part: MTV048
Category:
Optoelectronics
-> Display
-> On-Screen Display
Description: On-screen Display For Crt/lcd Monitor
Company: Myson Technology
Datasheet: Download MTV048 datasheet File size : 119 kB
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Datasheet text preview:
MTV048
On-Screen-Display Controller for CRT Monitor
GENERAL DESCRIPTION MTV048 is designed for monitor applications to display built-in fonts onto monitor screens. The display operation occurs by transferring data and controls information from the micro controller to RAM through a serial data interface. It can execute a fullscreen display automatically, as well as specific functions such as character background, bordering, shadowing, blinking, double height and width, font-byfont color control, button boxes, frame positioning, frame size control by character height and row-to-row spacing, horizontal display resolution, full-screen erasing, fade-in/fade-out effect, windowing effect, shadowing on window. MTV048 provides 384 fonts including 360 standard fonts, 16 multi-color fonts and 8 user fonts and 2 font sizes, 12x16 or 12x18 for more efficacious applications. The full OSD menu is formed by 15 rows x 30 columns, which can be positioned anywhere on the monitor screen by changing vertical or horizontal delay. FEATURES · · · · Software control for CRT applications. On-chip PLL circuitry. Horizontal SYNC input up to 150 KHz. Programmable horizontal resolutions up to 1524 dots per display line. · Full screen display consists of 15 (rows) by 30 (columns). · 12x16 or 12x18 dot matrix selection. · A total of 384 fonts including 360 standard fonts, 16 multi-color fonts and 8 user fonts. · 8 color selections for character foreground, background and window color. · Character button boxes with programmable box length. · Character bordering, shadowing and blinking effect for display. · Full-screen character double width control. · Double character height and/or width control per row. · Programmable positioning for display screen center. · Row to row spacing control per row to avoid expansion distortion. · 4 programmable background windows with multilevel operation and programmable shadow width/height/color. · Software clear bit for full-screen erasing. · Programmable adaptive approach to handle H, V sync collision automatically by hardware. · Fade-in/fade-out or blend-in/blend-out effects. · Compatible with SPI bus or I2C interface with address 7AH (slave address is mask option). · 5V or 3.3V power supply. · 16-pin PDIP/SOP package.
BLOCK DIAGRAM
SSB SCK SDA
9 RAMADDR
SERIAL DATA INTERFACE
R/W EN 8 DATA
DISPLAY & ROW CONTROL REGISTERS (RAM)
9 ROMADDR SHADOW LUMA
FONTS ROM & USER FONTS RAM LUMINANCE & BORDER GENERATOR
ROUT GOUT BOUT FBKG INT
VFLB
VERTICAL DISPLAY CONTROL
ROW
HFLB VCO RP
HORIZONTAL DISPLAY CONTROL PHASE LOCK LOOP
COLUMN
WINDOWS & FRAME CONTROL
W INDOW
COLOR ENCODER
VCLK
Myson Century, Inc. Taiwan: No. 2, Industry East Rd. III, Science-Based Industrial Park, Hsin-Chu, Taiwan Tel: 886-3-5784866 Fax: 886-3-5784349
USA: 4020 Moorpark Avenue Suite 115 San Jose, CA, 95117 Tel: 408-243-8388 Fax: 408-243-3188
sales@myson.com.tw www.myson.com.tw Rev. 1.2 January 2003 page 1 of 20
MTV048
PIN CONNECTION
VSSA VCO/XIN RP/NC V D DA HFLB SSB SDA SCK
1 2 4 5 6 7 8 MTV048N / MTV048P 3
16 15 14 13 12 11 10 9
VSS ROUT GOUT BOUT FBKG V33CAP VFLB VDD
PIN DESCRIPTIONS
Name VSSA VCO / XIN RP / NC I/O I/O I/O Pin No. 1 2 3 Descriptions Analog ground. This ground pin is used for internal analog circuitry. Voltage control oscillator. This pin is used to control the internal oscillator frequency by DC voltage input from external low pass filter. Bias Resistor (bit LCD = 0). The bias resistor is used to regulate the appropriate bias current for internal oscillator to resonate at specific dot frequency. Analog power supply. Positive 5V / 3.3V DC supply for internal analog circuitry. And a 0.1uF decoupling capacitor should be connected across to VDDA and VSSA. Horizontal input. This pin is used to input the horizontal synchronizing signal. It is a leading edge triggered and has an internal pull-up resistor. Serial interface enable. It is used to enable the serial data and is also used to select the operation of I2C or SPI bus. If this pin is left floating, I2C bus would be enabled. Otherwise the SPI bus is enabled. Serial data input. The external data transfer through this pin to internal display registers and control registers. It has an internal pull-up resistor. Serial clock input. The clock-input pin is used to synchronize the data transfer. It has an internal pull-up resistor. Digital power supply. Positive 5V / 3.3V DC supply for internal digital circuitry and a 0.1uF decoupling capacitor should be connected across to VDD and VSS. Vertical input. This pin is used to input the vertical synchronizing signal. It is leading triggered and has an internal pull-up resistor. 3.3V Regulator Capacitor connection. Connect a decoupling capacitor to VSS pin when DC supply = 5V, or connect to 3.3V directly when DC supply = 3.3V. Fast Blanking output. It is used to cut off external R, G, B signals of VGA while this chip is displaying characters or windows. Blue color output. It is a blue color video signal output. Green color output. It is a green color video signal output.
VDDA
-
4
HFLB SSB
I I
5 6
SDA SCK VDD
I I -
7 8 9
VFLB V33CAP
I I/O
10 11
FBKG BOUT GOUT ROUT VSS
O O O O -
12 13 14 15 16
Red color output. It is a red color video signal output. Digital ground. This ground pin is used for internal digital circuitry.
page 2 of 20
MTV048
FUNCTIONAL DESCRIPTIONS 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.
i)
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
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