- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358809 > LM1253A (National Semiconductor Corporation) Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator PDF資料下載
參數(shù)資料
| 型號： | LM1253A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
| 中文描述： | 單片三180兆赫的I2C顯像管預(yù)先集成在屏幕顯示（OSD）發(fā)生器模擬放大器 |
| 文件頁數(shù)： | 33/57頁 |
| 文件大?。?/td> | 1621K |
| 代理商： | LM1253A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
Display Page RAM
(Continued)
Row End Code
To signify the end of a row of characters, a special ‘Row-End’ (RE) code is used in place of a character code.
Bits 11–4 Row-End Code: A special character code of 01h
Bits 3–0:
Don’t care
The RE character tells the OSD generator that the character codes following must be placed on a new row in the displayed win-
dow.
Skipped Line Parameters
Each displayed row of characters may have up to 15 skipped (i.e., blank) lines beneath it in order to allow finer control of the ver-
tical spacing of character rows. (Each skipped line is treated as a single auto-height character pixel line, so multiple scan lines
may actually be displayed in order to maintain accurate size relative to the character cell—see section Constant Character
Height Mechanism).
To specify the number of skipped lines, the first character in each new row of characters to be displayed is interpreted differently
than the other characters in the row. Instead of interpreting the data in the location as a character code, the information of the
12 bit word is defined as follows:
Bits 11–8 Reserved.
Bits 7–4:
Skipped Lines. These four bits determine how many blank pixel lines will be inserted between the present row of dis-
play characters and the next row of display characters. A range of 0–15 may be selected.
Attribute code. The pixels in the skipped lines will normally be Color 1 of the addressed 2-Color Attribute Table entry.
Note that the pixels in the first line immediately below the character may be overwritten by the pixel override system
that creates the button box. (Refer to the Button Box Formation Section for more information.)
Each new line MUST start with an SL code, even if the number of skipped lines to follow is zero. An SL code MUST always follow
an RE control code.
An RE code may follow an SL code if several ‘transparent’ lines are required between sections of the window (see example 3 be-
low). In this case, skipped lines of zero characters are displayed, causing a break in the window.
Bits 3–0:
Window-End Code
To signify the end of the window, a special ‘Window-End’ (WE) code is used in place of a Row-End code.
Bits 11–4 Window-End Code: A special character code of 00h
Bits 3–0:
Don’t care
The WE control code tells the OSD generator that the character codes following belong to another displayed window at the next
window location. A WE control code may follow normal characters or an SL parameter, but never an RE control code.
Writing To The Page RAM
The Display Page RAM can contain up to 512 of the above listed characters and control codes. Each character, or control code
will consume one of the possible 512 locations. For convenience, a single write instruction to bit 3 of the Frame Control Register
(8400h) can reset the page RAM value to all zero.
Display Window 1 will also start at the first location (corresponding to the I
2
C address 8000h). This location must always contain
the Skip-Line (SL) parameters associated with the first row of Display Window 1. Subsequent locations should contain the char-
acters to be displayed on row 1 of Display Window 1, until the RE character code or WE character code is written into the Display
Page-RAM.
DS101265-48
DS101265-49
DS101265-50
L
www.national.com
33
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1262 | 200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs |
| LM1262NA | 200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs |
| LM1267NA | 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs |
| LM1267 | 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs |
| LM1269NA | 110 MHz I2C Compatible RGB Video Amplifier System with OSD & DACs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1253AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
| LM-1256 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16 x 16 matrix displays |
| LM-1256_1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16】16 matrix displays |
| LM-1256LB1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16】16 matrix displays |
| LM125AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:VOLTAGE REGULATORS |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。