- 您现在的位置：买卖IC网 > PDF目录30743 > LM1253AAE/NA (NATIONAL SEMICONDUCTOR CORP) ON-SCREEN DISPLAY IC, PDIP28 PDF资料下载
参数资料
| 型号： | LM1253AAE/NA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP28 |
| 封装： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件页数： | 27/61页 |
| 文件大小： | 1671K |
| 代理商： | LM1253AAE/NA |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页
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
window.
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
vertical 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
display characters and the next row of display characters. A range of 0–15 may be selected.
Bits 3–0:
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
below). In this case, skipped lines of zero characters are displayed, causing a break in the window.
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
2C 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
characters 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
LM1253A
www.national.com
33
相关PDF资料 |
PDF描述 |
|---|---|
| LM1267NA/NOPB | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| LM1269NA/NOPB | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| LM1276AAA/NA | 1 CHANNEL, VIDEO PREAMPLIFIER, PDIP28 |
| LM1279AN/NOPB | 3 CHANNEL, VIDEO AMPLIFIER, PDIP20 |
| LM1279N/NOPB | 1 CHANNEL, VIDEO AMPLIFIER, PDIP20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM1253AN | 制造商:NSC 制造商全称: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 制造商全称:Rohm 功能描述:16 x 16 matrix displays |
| LM-1256_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:16】16 matrix displays |
| LM-1256LB1 | 制造商:ROHM 制造商全称:Rohm 功能描述:16】16 matrix displays |
| LM125AN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:VOLTAGE REGULATORS |
发布紧急采购，3分钟左右您将得到回复。