參數(shù)資料
型號(hào)： STV9936PS
英文描述： 120MHZ ON SCREEN DISPLAY FOR MONITORS WITH 4 TRUE INDEPENDANT WINDOW DISPLAYS
中文描述： 120MHz的屏幕顯示的4真獨(dú)立的窗口監(jiān)測(cè)儀顯示展示
文件頁數(shù)： 8/48頁
文件大?。?/td> 1004K
代理商： STV9936PS
Register Addressing
STV9936P/S
8/48
2
Register Addressing
All control registers are located in Window 0, Row 0. All color-box data is 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 on page 8
).
All addresses (FAC and FWR bytes) are based on Formats A or B, and are written in hexadecimal
format.
Data in Window 0, Row 1 is reserved. DO NOT write to this location.
2.1
I2C Protocol
The serial interface with the microcontroller
is an I2C bus with 2 wires: SCL and SDA.The OSD is a
slave circuit with 2 modes: Write and Read.
2.1.1
Data to Write
In the OSD, the I2C bus is used to write - read:
G
the control data
G
the character codes and their respective color codes
G
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 21
.
Each character code is related to its own window, row and column. Consequently, the protocol of
the I2C transmission includes this information (window, row and column) to define the position of the
character on the screen. These 3 pieces of information about the position are transmitted in 2 bytes.
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 bit called ‘A’ allows you to distinguish the character
codes from the color codes corresponding to 1 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 boxes.
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 suitable for updating small amounts of data which are allocated to different window, 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-code attribute (bit A), or
when writing to a different I2C control register.
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參數(shù)描述
STV9936S 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:120-MHz On-Screen Display for Monitors with 4 True Independent Window Displays
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STV9937P/AA 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:120-MHz On-Screen Display for Monitors including PictureBooSTTM and 4 True Independent Window Displays
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