參數(shù)資料
型號： HD66420
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級灰度的點陣圖形液晶顯示驅(qū)動程序）
文件頁數(shù)： 13/52頁
文件大?。?/td> 167K
代理商： HD66420
HD66420
13
Column Address Inversion According to LCD Driver Layout:
The HD6420 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 HD66420 can invert the positional relationship between display RAM addresses and
LCD driver output pins by inverting RAM addresses. Specifically, the HD66420 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.
COM1
COM40
LCD panel
COM80
COM41
b) ADC = 1
S
S
S
S
S
S
S
S
S
S
S
COM80
COM41
COM1
COM40
a) ADC = 0
H’0
S
S
S
S
S
S
S
S
S
S
S
LCD panel
H’1
HD66420
HD66420
H’0
H’1
Figure 5 LCD Driver Layout and RAM addresses : 1/80 Duty cycle
Table 1 Scanning Direction and RAM Address
DTY1
DTY0
ADC
COMMON
SEGMENT
0
0
0
COM1
→
COM40, COM80
→
COM41
COM41
→
COM80, COM40
→
COM1
COM1
→
COM32, COM80
→
COM49
COM49
→
COM80, COM32
→
COM1
COM1
→
COM16, COM80
→
COM65
COM65
→
COM80, COM16
→
COM1
H’00
→
SEG1
H’00
→
SEG160
H’00
→
SEG1
H’00
→
SEG160
H’00
→
SEG1
H’00
→
SEG160
H’00
→
SEG1
H’00
→
SEG160
1
1
0
1
1
0
0
1
1
0
8 COM depend on R11
1
8 COM depend on R11
相關(guān)PDF資料
PDF描述
HD66420TA0 LCD Display Driver
HD66421 (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
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定時電路的240通道驅(qū)動器)
HD66520T 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM(點陣圖形LCD160通道驅(qū)動器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66420TA0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:LCD Display Driver
HD66421 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)
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
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