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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)： | 14/46頁(yè) |
| 文件大?。?/td> | 201K |
| 代理商： | HD66421 |
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Preliminary
Rev. 1.1E '99.02.10
HD66421
Column Address Inversion According to LCD
Driver Layout:
The HD66421 can always
display data in address H'0 on the top left of an
LCD panel regardless of where it is positioned
with respect to the panel. This is because the
HD66421 can invert the positional relationship
between display RAM addresses and LCD driver
output pins by inverting RAM addresses.
Specifically, the HD66421 outputs data in
address H'0 from SEG1 when the ADC bit in
control register 1 is 0, and from SEG160
otherwise. Here. the scan direction of row output
is also inverted according to the situation. as
shown in figure 6. Note that addresses and scan
direction are inverted when data is written to the
display RAM, and thus changing the ADC bit
after data has been written has no effect.
Therefore. hardware control bits such as ADC
must be set immediately after reset is canceled,
and must not be set while data is being displayed.
Figure 5 LCD Driver Layout and RAM addresses : 1/100 Duty cycle
COM1
COM50
LCD panel
COM100
COM51
b) ADC = 1
S
S
S
S
S
S
S
S
S
S
S
COM100
COM51
COM1
COM50
a) ADC = 0
H'0
S
S
S
S
S
S
S
S
S
S
S
LCD panel
DTY1
COMMON
SEGMENT
DTY0
ADC
0
1
COM1 –> COM50, COM100 –> COM51
COM51 –> COM100, COM50 –> COM1
H'00 –> SEG1
H'00 –> SEG160
0
1
COM1 –> COM40, COM100 –> COM61
COM61 –> COM100, COM40 –> COM1
H'00 –> SEG1
H'00 –> SEG160
0
1
H'00 –> SEG1
H'00 –> SEG160
0
1
8 COM depend on R11
8 COM depend on R11
H'00 –> SEG1
H'00 –> SEG160
0
0
0
1
1
0
1
1
Table 1 Scanning Direction and RAM Address
H'1
H'0
HD66421
HD66421
COM1 –> COM32, COM100 –> COM69
COM69–> COM100, COM32 –> COM1
14
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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