參數(shù)資料
型號(hào)： 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(yè)數(shù)： 34/57頁(yè)
文件大?。?/td> 1621K
代理商： LM1253A
Display Page RAM
(Continued)
The skip-line parameters associated with the next row must always be written to the location immediately after the preceding
row’s row-end character. The only exception to this rule is when a window-end character (value 00h) is encountered. It is impor-
tant to note that a row-end character should not precede a window-end character (otherwise the window-end character will be in-
terpreted as the next row’s skip-line parameters). Instead, the window-end character will both end the row and the window making
it unnecessary to precede it with a row-end character.
The I
2
C Format for writing a sequence of display characters is minimized by allowing sequential characters with the same at-
tribute code to be sent in a string as follows:
Byte
#
1—I
2
C Slave Address
Byte
#
2—LSB Address
Byte
#
3—MSB Address
Byte
#
4—Attribute Table Entry to use for the following characters
Byte
#
5—First display character, SL parameter, RE or WE control code.
Byte
#
6—Second display character, SL parameter, RE or WE control code.
Byte
#
7—Third display character, SL parameter, RE or WE control code.
.
.
Byte
#
n—Last display character in this color sequence, SL parameter, RE or WE control code to use the associated Attribute
Table Entry.
The Attribute Table Entry (Byte #4, of the above) is automatically associated with each subsequent display character or SL code
written. The following are examples of how the Display Page RAM associates to the actual On-Screen Display Window #1.
EXAMPLE #1:
A 3 X 3 character matrix of white characters on a black background is to be displayed using 2-color character codes:
The actual On-Screen Display of Window #1 is shown in Figure 41 Note the dotted white lines are not shown on the monitor.
They are shown here to show where the character ends.
Notes:
Every row must begin with an attribute and a SL. Display
Page RAM memory location 8000h will always be associ-
ated with the SL of row 0 of Display Window #1.
Every row except the last row of a Display Window must
end with an RE character. The character immediately af-
ter an RE character is always the SL value for the next
row.
The last row in a Display Window must be a WE charac-
ter. The WE character must NOT be preceded by an RE
character.
The entire Display Window may be written in a single I
2
C
write sequence because theAttribute Table entry (i.e., the
color palette) does not change for the entire Display Win-
dow.
The Attribute Table Entry that is associated with RE and
WE characters are “don’t cares”. In general it is most ef-
ficient just to allow them to be the same value as the At-
tribute Table Entry associated with the previous display
character.
The colors of the characters and background can be
stored in a single location in the 2-color attribute table, in
location ATT0.
The data shown in Table 9 is sent to the LM1253A in one
I
2
C transmission.
DS101265-51
FIGURE 41. Example 1 OSD
L
www.national.com
34
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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
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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
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