參數(shù)資料
型號(hào)： HD66421
廠商： Hitachi,Ltd.
英文描述： (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
中文描述： （內(nèi)存提供160通道4級(jí)灰度的點(diǎn)陣圖形液晶顯示驅(qū)動(dòng)程序）
文件頁(yè)數(shù)： 38/46頁(yè)
文件大?。?/td> 201K
代理商： HD66421
Preliminary
Rev. 1.1E '99.02.10
HD66421
Display Memory Access Register (R4):
The
display memory access register (figure 37) is used
to access the display RAM. If this register is
write-accessed, data is directly written to the
display RAM. If this register is read-accessed, data
is first latched to this register from the display
RAM and sent out to the data bus on the next read;
therefore, a dummy read access is necessary after
setting the display RAM address.
Display Start Raster Register (R5):
The display
start raster register (figure 38) designates the raster
to be displayed at the top of the LCD panel.
Varying the set value scrolls the display vertically.
The set value must be one less than the actual top
raster and less than the duty ratio. If the value is set
outside these ranges, data may not be displayed
correctly. Data bits 7 is unused; they should be set
to 0 when written to.
Data bit
Set value
7
6
5
4
3
2
1
0
Figure 37 Display Memory Access Register (R4)
D7
D6
D5
D4
D3
D2
D1
D0
Data bit
Set value
7
6
5
4
3
2
1
0
Figure 38 Display Start Raster register (R5)
ST5
ST4
ST3
ST2
ST1
ST0
ST6
Blink Start Raster Register (R6):
The blink start
raster register (figure 39) designates the top raster
in the area to be blinked. The set value must be
one less than the actual top raster and less than the
duty ratio. If the value is set outside these ranges,
operations may not be correct. Data bits 7 is
unused; they should be set to 0 when written to.
Blink End Raster Register (R7):
The blink end
register (figure 40) designates the bottom raster in
the area to be blinked. The area to be blinked is
designated by the blink registers, blink start raster
register, and blink end raster register. The set
value must be one less than the actual bottom
raster and less than the duty ratio. It must also be
greater than the value set in the blink start raster
register. If an inappropriate value is set, operations
may not be correct. Data bits 7 is unused; they
should be set to 0 when written to.
Data bit
Set value
7
6
5
4
3
2
1
0
Figure 39 Blink Start Raster register (R6)
BSL5
BSL4
BSL3
BSL2
BSL1
BSL0
BSL6
Data bit
Set value
7
6
5
4
3
2
1
0
Figure 40 Blink End Raster register (R7)
BEL5
BEL4
BEL3
BEL2
BEL1
BEL0
BEL6
38
相關(guān)PDF資料
PDF描述
HD66421TB0 (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
HD66503 240-Channel Common Driver with Internal LCD Timing Circuit(帶內(nèi)部LCD定時(shí)電路的240通道驅(qū)動(dòng)器)
HD66520T 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM(點(diǎn)陣圖形LCD160通道驅(qū)動(dòng)器)
HD66522 160-Channel Column Driver with Internal Bit-Map RAM for Reflective Color Display and Grayscale Display(點(diǎn)陣圖形LCD160通道驅(qū)動(dòng)器)
HD66523R 240-Channel Common Driver with Internal LCD Timing Circuit(帶內(nèi)部LCD定時(shí)電路的240通道驅(qū)動(dòng)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66421TB0 制造商:Renesas Electronics Corporation 功能描述:
HD66503 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
HD66520TA0 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
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