ST STV9937 User Manual

120-MHz On-Screen Display for Monitors including

PictureBooST

Main Features

■ Horizontal frequency up to 150 kHz

■ I²C interface for microcontrollers with slave

address BA(h) in Read and Write modes

and 4 True Independent Window Displays

STV9937

DATASHEET

PictureBoost

■ Pixel clock (F

PIXEL1

) for the PictureBooSTä

(PB) from 30 to 60 MHz synchronised either on Hsync or on Hfly: CLK1

■ Window position programmable by RGB or

C interface

■ Video Analog inputs with comparator on

three channels

■ Three 8 bit registers for other data,

programmable by RGB

OSD

■ On-chip Pixel Clock Generat or (F

PIXEL2

7.68 MHz to 120 MHz, CLK2

■ OSD clock synchronized on Hsync or Hfly

■ Programmable horizontal resolutions from

384 to 1524 dots per scan line

■ 4 independent windows all with character

display

■ Overlapping windows with automatic control

of display priorities and scrolling menu effects

■ Independent and programmable displays,

positions and sizes for each window

■ Transparent or 8 programmable background

colors for each window

■ Window size up to 16 rows of 32 characters

■ Each window has its own bordering or

shadowing effects with programmable color, height and width

) from

PDIP 24 (Plastic Dual In line Shrink Package)

ORDER CODE: STV9937P/AA

■ 496 standard and 16 multi-color characters or

graphic fonts in ROM. Character fonts can be customized using a mask-programmable ROM

■ Characters

● Common character height and ro w spa ce.

Character height from 18 to 127 lines and space lines from 0 to 62 spli t abo v e and bel o w character rows

● 12 x 18 dot matrix per character

● Display of up to 640 characters

● Programmable shadow effects for characters

in each separate window

● 32 programmable background, foreground,

blinking character colors for character s (8 possibilities per window)

● 8 selectable colors for standard characters

● Transparent and 8 selectable colors for

background

■ On-Screen Effects

● Fade-in/Fade-out effects

● Possibility of full-screen display with a

selectable color

■ Each window can be separately erased

■ Programmable common positioning to easily

control centered display

February 2004 1/49

STV9937

Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.1 Pin Descript io n ................................................................................. .. .. ..............................7

Chapter 2 Register Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.1 I²C Protocol ......................................................... .. .. ........................... .. .. ............. ... .. ............9

2.1.1 Data to Write .........................................................................................................................................................9

2.1.2 Transmission Formats ...................................... ....................................... ..............................................................9

2.1.3 Format, Window and Row Address (FWR) .........................................................................................................10

2.1.4 Format, Attribute and Column Address (FAC) ....................................................................................................10

2.1.5 Control Data, Color Codes or Character Codes .................................................................................................11

2.1.6 Configuration of Transmission Formats .............................................................................................................11

2.2 Format Chang ing ................. .......................... ... .. ............. .. .. ........................... .. .. ...............11

To change from Format A to Format B ...............................................................................................................11

To change from Format A to Format C ...............................................................................................................11

To change from Format B to Format A ...............................................................................................................11

To change from Format B to Format C ...............................................................................................................12

2.3 Read Mode ....................... ............................. .. ............................. .. ....................................12

2.4 Addressing Ma p . .. ..............................................................................................................12

Chapter 3 Window Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

3.1 Enable Display ...................................................................................................................14

3.2 Origin Positions for the 4 Wind ows .......... .. ........................................................................14

3.2.1 General Horizontal Delay (HD) ...........................................................................................................................14

3.2.2 General Vertical Delay (VD) ................................................................................................................................14

3.3 Window Positions in the Frame ................................... .. .......................... ...........................15

3.3.1 Window Horizontal Delay ....................................................................................................................................15

3.3.2 Window Vertical Delay ........................................................................................................................................15

3.4 Window Size: Number of Characte r Rows and Character Columns ............................. .. ...16

3.4.1 Window Horizontal Size ......................................................................................................................................16

3.4.2 Window Vertical Size ..........................................................................................................................................16

3.5 Window Background Color ......... ................................................................................. .......17

3.6 Window Bordering and Shadowing Effects ........................... ....................... .. ....................17

3.6.1 Enable Bordering or Shadowing Effects .............................................................................................................17

3.6.2 Bordering or Shadowing Selection .....................................................................................................................17

3.6.3 Border or Shadow Color .....................................................................................................................................18

3.6.4 Bordering or Shadowing Size .............................................................................................................................18

3.7 Window Display Priority Management .............................. ...................... ...................... .. ...19

Chapter 4 Character Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

4.1 General Description ....................................................................... ....................... .............20

4.2 Horizontal R e so l u tio n ......................... ... .. ..........................................................................20

4.3 Character Height ...............................................................................................................20

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STV9937

4.4 Space Lines .......................................................................................................................21

4.5 Character Colors ................................................................................................................22

4.5.1 Character Background Color ..............................................................................................................................22

4.5.2 Character Color ...................................................................................................................................................23

4.5.3 Character Blinking Effect ....................................................................................................................................24

4.6 Character Shadowing .................................................... .. ............................................ .. .....24

4.7 Character Font ...................................................................................................................25

Chapter 5 RAM Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

5.1 Character Coding ...............................................................................................................26

5.2 Window Memory Allocation ............................................................. .. ............................ .. ...26

5.3 Memory Size Allocation ......................................................................................................26

5.4 Window Reset ............................................... .. ............................... ....................................28

Chapter 6 Pixel Clock Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Chapter 7 Picture BooSTTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

7.1 Video RGB Input Stage ......................................................................................................30

7.2 PictureBooSTTM RGB Decoder ........................................................................................31

7.2.1 Data Sent Using I²C ............................................................................................................................................31

7.2.2 Data Sent Using the RGB Channel ....................................................................................................................31

7.3 Control Reg is te r s D e s cr ip tion ................ .. ............. .. .. .............. .. .. ........................... .. .. ........33

7.4 Line and Pixel O ff s ets .......... .. ........................................ .. .. ........................... .. .. .................34

7.5 PLL Synchronised ..............................................................................................................34

Chapter 8 General OSD Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.1 Enable OSD .......................................................................................................................35

8.2 Fade-in and Fade-out Effect ....................... ........................ ...............................................35

8.3 Full Screen Display ..................................... .................. .................. ................... ................35

8.4 Signal Polarity and Triggering ...........................................................................................36

Vertical Sync Triggering (VS input) .....................................................................................................................36

Horizontal Sync Triggering (HSYNC input) .........................................................................................................36

RGB Output Polarity (ROUT, GOUT and BOUT outputs) ...................................................................................36

Fast Blanking Output Polarity (FBLK output) ......................................................................................................37

8.5 Reset ..... ............... ................ ............. ................ ............... ................ ............. .....................37

Power On Reset .................................................................................................................................................37

Soft Reset ...........................................................................................................................................................37

PLL Register Reset .............................................................................................................................................37

Chapter 9 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

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STV9937

9.1 Register Specification ........................................................................................................38

Chapter 10 Application Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

10.1 Software Hints .............................................................. .. .. ..................................................42

10.1.1 Programming Recommendations .......................................................................................................................42

10.1.2 Examples of Programming ..................................................................................................................................42

Hard reset at power-up (following a power-up) ...................................................................................................42

Change of position & size of 1 window (ex. window 3) without disable of window .............................................42

Re-allocation, reset, and writing new characters in windows ..............................................................................43

10.2 Hardware Hints ..................................................................................................................43

Chapter 11 Application Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Chapter 12 Electrical and Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

12.1 Absolute Max im u m Ratings ............ .. ..................................................... .. ... .......................45

12.2 Operating Co nd itions ............. .. ..................................................... ... .. .......................... .. ....45

12.3 Electrical and Timing Characteristics ........................................................ .........................45

12.4 I²C Bus Characteristics .................................. ... .. .......................... ... .. .......................... .. ....46

Chapter 13 Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Chapter 14 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

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STV9937 General Description

1 General Description

The STV9937 is an Advanced On Screen Dis pla y gener ator for CR T monit ors . It in cludes a speci fic architecture allowing mul tiple menu displays, a built in 512 charact e r ROM and the Picture BooST

The patented Picture BooST screen area or even over the entir e screen.

system.

feature allows images to be boosted either within a window, a

Using traditional architecture (OSD + Preamp STV9212) and without any additional devices on the

CRT board, Picture BooST

boosts the brightness and sharpness of the video on CRT displays

giving a TV like effect.

The STV9937 can drive Picture BooST

either through the VGA cable (using RGB or DDC), through the USB channel via the MCU or through the OSD menu (the registers can be accessed b y the MCU via I²C).

The STV9937 embeds the RGB data decoder, the Pic tur e BooST Picture BooST

Along with the Picture BooST

signal generator.

and traditional OSD features, the STV9937 allows a simultaneous

Control Registers and the

display of up to four menus anywhere on the screen. Each of the four independent windows, all displaying characters, can be overlapped and display priorities are automatically controlled.

● Window sizes and posit i ons are i ndependentl y prog r ammable as well as scrol ling men u ef fects.

● Programming of the general OSD and of the 4 windo ws is controll ed b y an I²C bus in Re ad and

Write modes, to suit the various CRT displays.

● Associated with an easily programmable character height, the internal PLL generates the

programmable pixel clock, without using a crystal oscillator, that defines the character width making the device suitable for multi-sync applications.

● A maximum of 640 charac ters, defi ned in the mask-pr ogrammab le R OM, are distrib uted among

the 4 windows and displayed simultaneously.

Figure 1: Multi-window Concept with Character Display

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General Description STV9937

Figure 2: STV9937 Block Diagram

STV9937

HSYNC

TEST1 TEST2

HFLY

SCL

SDA

STV9937

PB Sequencer

OSD Sequencer

I2C Interface And Registers

Test

RPVCO

PLL

Reset Signals

OSD Pixel Clock PB Pixel Clock

Reset

RIN GIN

RGB Input Buffer

Picture BooST

Decoder and Generator

4 Windows

OSD

Generator

BIN

RAM

ROM

ROUT

ContrastContrast

System Block Diagram

I2C

PreAmplifier: STV9212

OSD: STV9937

Figure 3: PictureBooST

Computer main Unit Monitor CRT board

PictureBooST™

Video Card

DDC H Sync V Sync

Picture booST ™

Window ™ Software

Color code

R G B Boost OSD FBlk

PictureBooST ™

Decoder

Window

Coordinate

GOUT BOUT FBLK

Boost gain

& Sharpness

OSD

generator

Line PLLLine PLL

Video Amplifier AC or DC

DriveDrive

H Fly

H Sync

6/49

STV9937 General Description

1.1 Pin Description

Figure 4: Pin Connections

AVSS

VCO

AVDD TEST1 TEST2

HFLY

HSYNC

SDA

SCL

1 2 3 4 5 6 7 8 9 10 11 12

24 23 22 21 20 19 18 17 16 15 14 13

IVSS BIN GIN RIN IVDD DVDD DVSS PB BOUT GOUT ROUT FBLK

Table 1: Pin Descriptions

N° Pin Name Direction Digital/Analog Function

1 AVSS - Supply Analog Ground 2 RP I/O Analog for VCO 3 VCO I/O Analog for VCO 4 AVDD - Supply Analog Power Supply 5 TEST1 Input Digital Remains at 0 (for test purposes only) 6 TEST2 Input Digital Remains at 0 (for test purposes only) 7 HFLY Input Digital Horizontal Flyback Input 8 VS Input Digital Vertical Synchronization Input

9 HSYNC Input Digital Hor i zontal Synchronization Input 10 SDA I/O Digital Serial Data of I²C bus 11 SCL Input Digital Serial Clock of I²C bus 11 DVDD - Supply Digital Power Supply 12 N/C - - 13 FBLK Output Digit al Fast Blanking Output 14 ROUT Output Digital OSD Red Color Output 15 GOUT Output Digital OSD Green Color Output 16 BOUT Output Digital OSD Blue Color Output

17 PB Output Digital 18 DVSS - Supply Digital Ground

PictureBooST

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Output

General Description STV9937

Table 1: Pin Descriptions (Continued)

N° Pin Name Direction Digital/Analog Function

19 DVDD - Supply Digital Power Supply 20 IVDD - Supply Power Supply for Video Input 21 RIN Input Analog VGA Signal Input, Red Channel 22 GIN Input Analog VGA Signal Input, Green Channel 23 BIN Input Analog VGA Signal Input, Blue Channel 24 IVSS - Supply Ground for Video Input

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STV9937 Register Addressing

2 Register Addressing

All OSD control registers are located in Wi ndow 0, Row 0. PictureBooSTTM control registers are located in Window 0, Row 1. All color-boxes data are located in Window 0, Row 2.

Three formats are available: A, B and C, as described in the I²C protocol (see Section 2.1: I²C

Protocol).

All addresses (FAC and FWR bytes) are based on Formats A or B, and are written in hexadecimal format.

2.1 I²C Protocol

The serial interface with t he microcontroller is an I²C bus with 2 wires: SCL and SD A. The OSD is a slav e circuit with 2 modes: Write and Read. The sla v e address of the OSD is BAh in write mode and BBh in read mode.

2.1.1 Data to Write

In the OSD, the I²C bus is used to write - read:

● the contro l data

● the character codes and their respective color codes

● the color-boxes (8 color-boxes per window).

A color-box contains the character color, character background color and blink data. There are 8 color-boxes for each OSD window which are used to define the colors available for all the characters of the given OSD window. 3 bits are required to code the 8 color-boxes. These bits are the color code.

For more information, refer to Section 4.5: Character Colors on page 22. Each character code is related to its own window, row and column. Consequently, the protocol of

the I²C transmission inclu des this information (window, ro w and column) to define the position of t he character on the screen. These 3 piec es of information about the position are tr ansmitted in 2 b ytes .

As each character on the screen has its own color code, the same protocol is used to write all the color codes and character codes. Only the attribute bit called ‘A’ allows the character codes to be distinguished from the color co des corresponding to one position on the screen.

The control data is also written with the same protocol using windows, rows and columns. Window 0 is reserved for control data and color codes.

2.1.2 Transmission Formats

There are 3 transmission formats to suit the amount of data to update. The transmission format is coded in the “window/row/column” bytes.

Format A is suitab le for updating small amounts of data whi ch are allocated to different windo w, row and column addresses.

Format B is recommended for updating data for the same window and the same row address, but with a different column address and when changing the Character/Color-box attribute (bit A), or when writing to a different I²C control register.

Format C is appropriate for updating large amounts of data from a full window or full screen. The window, row and column addresses are incremented automatically when this format is applied. Data is written to fill all the allocation memory of the windows .

9/49

The transmission formats are as follows:

1. Format A: S-FWR-FAC-D

® FWR-FAC-D ® FWR-FAC-D ® FWR-FAC-D...Stop

2. Format B: S-FWR-FAC-D

3. Format C: S-FWR-FAC-D

® FAC-D ® FAC-D ® FAC-D...Stop ® D ® D ®D...Stop

Where:

S = Slave address = BAh FWR = Format, Window and Row address FAC = Format, Attribute and Column address D = CTRL Control data (8 bits), CB Color codes (3 bits) or RC Character codes (9 bits).

In Format C, t he order of automati c incrementat ion for data D i s first t he column v alue , then t he ro w value, and then the window value.

Table 2: Various Bytes coded in the I²C Transmission

Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 FWR

FAC

D: Control Data (in window 0 only) CTRL[7:0] D: Color Code and Character Code MSB 0 0 0 RC[8] 0 CB[2:0] D: Character Code LSBs RC[7:0]

1 0

W[2:0] R[3:0]

F A C[4:0]

2.1.3 Format, Window and Row Address (FWR)

Bit 7 indicates the ‘Window & Row’ byte when set to 1. W[2:0]: Window Number

000: Control Data and Color Codes 001: Window 1 010: Window 2 011: Window 3 100: Window 4

R[3:0]: Row Numbers from 0 to 15. Each window has a maximum number of 16 rows.

2.1.4 Format, Attribute and Column Address (FAC)

Bit 7 indicates the ‘Attrib ute & Column’ byte when set to 0. F: Format

0: Format A or B 1: Format C

A: Transmission of character code or color code

0: Character Code 1: Color Code and Character Code MSB

When reading or writing control data and/or character codes, bit A must be set to 0. For color code and character code MSB, bit A must be set to 1.

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STV9937 Register Addressing

C[4:0]: Column Number

There are 32 possible columns .

00000: 1 column 11111: 32 columns

2.1.5 Control Data, Color Codes or Character Codes

Color codes are stored on 3 bits. Control data is stored on 8 bits and Charact er codes are stored on 9 bits.

2.1.6 Configuration of Transmission Formats

Table 3: Configuration of Transmission Formats

Byte Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Address bytes for Characters Codes

Address bytes for Color Codes

Windows & Rows Column (A and B) Column (C) Windows & Rows Column (A and B) Column (C)

All formats must start with the S, FWR and FAC bytes.

2.2 Format Changing

To change from Format A to Format B

S-FWR[0]- FAC[0] -D[0] ® FWR[1]- FAC[1]- D[1] ® FWR[2]- FAC[2]- D[2] ® FAC[3]- D[3] ® FAC[4]D[4]

® FAC[5]- D[5]...

The F bit from the FAC byte is alwa ys 0 in this case.

FWR

FAC FAC

FWR

FAC FAC

A, B or C 1 W[2:0] R[3:0]

A or B 0 0 0 C[4:0]

C 0 1 0 C[4:0]

A, B or C 1 W[2:0] R[3:0]

A or B 0 0 1 C[4:0]

C 0 1 1 C[4:0]

To change from Format A to Format C

S - FWR[0]- FAC[0]- D[0] ® FWR[1]- FAC[1]- D[1] ® FWR[2]- FAC[2]- D[2] ® D[3] ® D[4] ® D[5]... The “F” bit from the FAC byte is as follo w s:

F[0] = F[1] = “0” F[2] = “1”

To change from Format B to Format A

S - FWR[0]- FAC[0]-D[0]® FAC[1]- D[1] ® FAC[2]-D[2] ® FWR[3]- FAC[3]- D[3] ® FWR[4]- FAC[4]D[4]...

The F bit from the FAC byte is alwa ys 0 in this case.

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To change from Format B to Format C

S - FWR[0]- FAC[0]- D[0] ® FAC[1]- D[1] ® FAC[2]- D[2] ® D[3] ® D[4]... The “F” bit from the FAC byte is as follows: F[0] = F[1] = “0” and F[2] = “1” It is not possible to change from Format C back to Format A or B.

Figure 5: Format Changing Sequences

Start

start

2.3 Read Mode

The transmission format is shown as below: Start - S(w) - FWR- FAC - Stop - Start - S(r) - D Where:

S(w) = Slave address in write mode = BAh = 10111010,

S(r) = Slave address in read mode = BBh = 10111011. Registers and data in RAM are readable. This mode is useful when developing OSD applications.

2.4 Addressing Map

Format A

Format C

Format B

® D ® D ® D...Stop

Table 4: Window Addressing Map

Window Row Column Data

Window 0 Row 0 Columns 0 to 31 Control Data (8 bits) Window 0 Row 1 Columns 0 to 31 Window 0 Row 2 Columns 0 to 31 Color-boxes (8 bits)

Windows 1, 2, 3 and 4 Rows 0 to n (n = 15 max.) Columns 0 to m (m = 31 max.) Characters Coding (12 bits)

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PictureBooST

Data

STV9937 Window Specifications

3 Window Specifications

Four different independent windows with separate character displays can be simultaneously display ed on screen . It is pos sib le to ha v e o v erlapping windo ws with an automat ic control of display priorities: downscale priorities from Window 4 to Window 1.

Window 1 is well-ad apted for the OSD general menu. The 4 windows, each with its own character display, can be positioned anywhere on the screen. The following characteristics are defined for each window:

● Enable Display

● Position

● Size, adjustable with memory allocation

● Background Color

● Bordering or Shadowing effects with programmable color, height and width.

Figure 6: Example of Window Displays

Axis Origin

Screen

Window 2

Window 1

Window 3

Window 4

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Window Specifications STV9937

3.1 Enable Display

The Enable Display command for each window is selected by bits ENW1, ENW2, ENW3 and ENW4. If the ENWi bit is set to 1, the corresponding window is displayed.

Table 5: Enable Display

FWR FAC Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

80h 07h 0h ENW4 ENW3 ENW2 ENW1

3.2 Origin Positions for the 4 Windows

The 4 windows are arranged in a fr ame whose origin coordinates are t he horizontal dela y ( HD) and the vertical delay (VD) loc ated at the upper left-hand corner of the monitor screen. When the HD and VD values are changed, the 4 windows within the frame position are automatically shifted by the same value. The origin (HD, VD) can be programmed anywhere on the screen. Adjusting the origin position is used to globally reposition the OSD windows.

The advantages of this system are easi er programming, the possibility to adapt the position of all windows at a single time without changing the relative position of each window and the possibility for the user to program all 4 window positions.

3.2.1 General Horizontal Delay (HD)

Table 6: Origin of Windows on Horizontal Axis: Horizontal Delay

FWR FAC Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

80h 04h 0h HD[6:0]

The general horizontal delay defines the horizontal position of the origin coordinate f or all four OSD windows. The horizontal delay is selected by bits HD[6:0].

General Horizontal Offset = 50 pixels

General Horizontal Delay = HD[6:0] x 6 pixels + General Offset (i n pixels) The default value of the horiz ontal delay is 0h (left-hand side of the moni tor screen).

3.2.2 Gen eral Vertical Delay (VD)

Table 7: Origin of Windows on Vertical Axis: Vertical Delay

FWR FAC Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

80h 05h 0h VD[7:0]

The general vertical delay defines the vertical position of the origin coordinate for all four OSD windows. The v ertical delay is selected by bits VD[7:0] . A general vertical offset of 2 scan lines is also applied.

The range of the vertical delay is from 2 to 1022 scan lines, in steps of 4 scan lines each.

General Ver tical Delay = VD[7:0] x 4 + 2 (in scan lines) The default value of the vertical delay is 0h (top of screen).

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STV9937 Window Specifications

3.3 Window Positions in the Frame

All values are referenced to the origin coordinates (HD, VD). For more information, refer to

Figure 6 on page 13.

3.3.1 Window Horizontal Delay

The window horizontal delay defines the horizontal start position for each separate OSD window. This value is selected by bits HDW1[6:0] , HDW2[6:0], HDW3[6:0] and HDW4[6:0], respectively.

Table 8: Window Horizontal Delay

FWR FAC Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

80h

0Ch, 11h,

16h, 1Bh

0h, 20h,

0h, 10h

HDWi[6:0]

The range of the window horizontal delay is from 0 to 1524 pixels, in steps of 12 pixels each.

Window Horizontal Delay = HDWi[6:0] x 12 pixels The total horizontal delay of a window is:

General Horizontal Delay + HDWi[6:0] x 12 pixels; or,

HD[6:0] x 6 pixels + HDWi[6:0] x 12 pixels + (50 pixels). The default values for the window horizontal delay for each of the four OSD windows is given in

Table 8.

3.3.2 Window Vertical Delay

The window vertical delay defines the vertical start position for each separate OSD window. This value is selected by bits VDW1[5:0], VDW2[ 5:0], VDW3[5: 0] and VDW4[5:0], respectively.

Table 9: Window Vertical Delay

FWR FAC Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

80h

0Dh, 12h,

17h, 1Ch

0h, 0h, Ch, Ch

VDWi[5:0]

The range of the window v ertical delay i s from 0 to 63 rows of c haracters, in steps of 1 charact er row each. It is important to note that the height of each character row is defined by the row height parameter. For more information, refer to Section 4.4: Space Lines on page 21.

Window Vertical Delay = VDWi[5: 0] x Row_Height The total vertical delay of a windo w is:

General Ver tical Delay + VDWi[5:0] x Row_Height (in scan lines); or,

(VD[7:0] x 4 + 2) + VDWi[5:0] x Row_Height (in scan lines). The default values for the window vertical delay for each of the four OSD windows is given in

Table 9.

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