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參數(shù)資料
| 型號： | HT47C20L |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類： | 數(shù)學處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 30/55頁 |
| 文件大?。?/td> | 341K |
| 代理商： | HT47C20L |
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HT47C20L
30
January 18, 2000
LCD display memory
The HT47C20L provides an area of embedded
data memory for LCD display. The LCD display
memory is designed into 20 4 bits. If the LCD
selected 19 4 segments output, the 53H of the
LCD display memory can not be accessed. This
area is located from 40H to 53H of the RAM at
Bank 1. Bank pointer (BP; located at 04H of the
data memory) is the switch between the gen-
eral data memory and the LCD display mem-
ory. When the BP is set 1 any data written
into 40H~53H will effect the LCD display (indi-
rect addressing mode using MP1). When the BP
is cleared 0 , any data written into 40H~53H
has to access the general purpose data memory.
The LCD display memory can be read and writ-
ten only by indirect addressing mode using
MP1. When data is written into the display
data area, it is automatically read by the LCD
driver which then generates the corresponding
LCD driving signals. To turn the display On or
Off,a 1 ora 0 iswrittentothecorresponding
bit of the display memory, respectively.
The figure illustrates the mapping between the
display memory and LCD pattern for the
HT47C20L.
LCD driver output
The output number of the HT47C20L LCD driver
can be 20 2 or 20 3 or 19 4 by mask option
(i.e.1/ 2duty, 1/3 duty or 1/4 duty).
The bias type LCD driver is C type. If the 1/2
duty or 1/3 duty type is selected, the 1/2 bias
type is selected. If the 1/4 duty type is selected,
the 1/3 bias type is selected. A capacitor has to
beconnectedbetweenC1andC2.Thetwokinds
of the configurations of V1, V2 and V3 pins are
as follows:
5 .
5 .
5 .
5 * .
= .
= .
= * .
*
*
+
-
9
*
Display memory (bank 1)
*
V1, V2, V3 application diagram
相關PDF資料 |
PDF描述 |
|---|---|
| HT47C20 | 8-BIT MICROCONTROLLER |
| HT47R20 | 8 位R-F 型OTP 單片機 |
| HT48C05 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C06 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C10-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設備) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HT47C20L_05 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type Low Voltage 8-Bit Mask MCU |
| HT47M50 | 制造商:NTE Electronics 功能描述: |
| HT47R10A-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type 8-Bit MCU |
| HT47R20 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8 位R-F 型OTP 單片機 |
| HT47R20A-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:R-F Type 8-Bit MCU |
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