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)： 16/52頁
文件大?。?/td> 167K
代理商： HD66420
HD66420
16
Display RAM Configuration and Display
The HD66420 incorporates a bit-mapped display RAM. It has 320 bits in the X direction and 80 bits in the
Y direction. The 320 bits are divided into forty 8-bit groups. As shown in figure 6, data written by the MPU
is stored horizontally with the MSB at the far left and the LSB at the far right. The consecutive two bits
control one pixel of LCD, this means that one 8-bits data contains data which controls four pixels.
The ADC bit of control register 1 can control the positional relationship between X addresses of the RAM
and LCD driver output (figure 7). Specifically. the data in address H’0 is output from SEG1 when the ADC
bit in control register 1 is 0, and from SEG160 otherwise. Here, data in each 8-bit group is also inverted.
Because of this function, the data in X address H’0 can be always displayed on the top left of an LCD panel
with the MSB at the far left regardless of the LSI is positioned with respect to the panel. In this case, DB7,
DB5, DB3 and DB1 are more significant bit in consecutive two bits.
SEG1
SEG2
SEG3
SEG4
1 1 1 0 0 1 0 0
0 0 0 1 1 0 1 1
D
B
7
6
5
4
Y0
Y1
D
B
1
LCD panel
Display RAM
SEG157
SEG158
DEG159
SEG160
1 1 1 0 0 1 0 0
0 0 0 1 1 0 1 1
D
B
0
2
3
1
Y0
Y1
D
B
7
LCD panel
Display RAM
D
B
6
D
B
4
D
B
5
D
B
D
B
D
B
D
B
D
B
D
B
D
B
3
D
B
2
D
B
0
(a) ADC = 0
(b) ADC = 1
SEG160
SEG1
Figure 7 Display RAM Data and Display
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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