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參數資料
| 型號： | HD66421TB0 |
| 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： | （內存提供160通道4級灰度的點陣圖形液晶顯示驅動程序） |
| 文件頁數： | 35/46頁 |
| 文件大?。?/td> | 201K |
| 代理商： | HD66421TB0 |
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Preliminary
Rev. 1.1E '99.02.10
HD66421
Reset
The low RES signal initializes the HD66421,
clearing all the bits in the internal registers. During
reset. the internal registers cannot be accessed.
Note that if the reset conditions specified in the
Electric Characteristics section are not satisfied,
the HD66421 will not be correctly initialized. In
this case, the internal registers of the HD66421
must be initialized by software.
Initial Setting of Internal Registers:
All the
internal register bits are cleared to 0. Details are
listed below.
- Normal operation
- Oscillator is active; OSC-OSC1 is used
- Display is off
- Y address of display RAM is incremented
- 1/100 duty cycle
- X and Y addresses are 0
- Data in address H'0 is output from the SEGl pin
- Blink function is inactive
- Operational amplifier is disabled
Initial Setting of Pins:
Bus interface pins
During reset, the bus interface pins do not accept
signals to access internal registers; data is
undefined when read.
LCD driver output pins
During reset. all the LCD driver output pins
(SEG1 to SEGl61, COM1 to COM100) output
Vcc-level voltage, regardless of data value in the
display RAM, turning off the LCD. Here, the
output voltage is not alternated. Note that the
same voltage (VLCD) is applied to both column
and row output pins to prevent liquid crystals
from degrading.
35
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相關代理商/技術參數 |
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|---|---|
| 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 |
| HD66520TB0 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM |
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