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參數(shù)資料
| 型號： | HD66728 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點圖形LCD控制器) |
| 中文描述： | 112 × 80點圖形LCD控制器/驅動器（112 × 80點圖形液晶顯示控制器） |
| 文件頁數(shù)： | 18/138頁 |
| 文件大?。?/td> | 2158K |
| 代理商： | HD66728 |
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HD66728
18
General Output Ports (PORT0 to PORT 2)
The HD66728 has three general output ports. These ports control drive current such as that for LEDs or
backlighting by using the current boosted by an external transistor.
Address Counter (AC)
The address counter (AC) assigns addresses to the DDRAM or CGRAM. When an address set instruction is
written into the IR, the address information is sent from the IR to the AC. Selection of the DDRAM and
CGRAM is also determined concurrently by the RAM select bit (RM1/0).
After writing into the DDRAM or CGRAM, the AC is automatically incremented by 1 (or decremented by
1). After reading from the data, the RDM bit automatically updates or does not update the AC. The cursor
display position is determined by the address counter value.
Display Data RAM (DDRAM)
The display data RAM (DDRAM) stores display data represented in 8-bit character codes in the character
display mode. Its capacity is 160
×
8 bits, or 160 characters, which is equivalent to an area of 16 characters
×
10 lines. Any number of display lines (LCD drive duty ratio) from 1 to 10 can be selected by software.
Here, assignment of DDRAM addresses is the same for all display modes (table 5). The line to be displayed
at the top of the display (display-start line) can also be selected by register settings. The graphics display
mode does not use data in the DDRAM.
Character Generator ROM (CGROM)
The character generator ROM (CGROM) generates 6
×
8-dot character patterns from 8-bit character codes.
It is equipped with a memory bank to generate 240 character patterns or 192 character patterns, switch able
according to applications. For details, see the CGROM Bank Switching Function section. Table 6 illustrates
the relation between character codes and character patterns for the Hitachi standard CGROM. User-defined
character patterns are also available using a mask-programmed ROM (see the Modifying Character Patterns
section).
Character Generator RAM (CGRAM)
The character generator RAM (CGRAM) allows the user to redefine the character patterns in the character
display mode. Up to 64 character patterns of 7 x 8-dot characters can be simultaneously displayed.
DRAM-specified character code can be selected to display one of these user font patterns.
The CGRAM serves as a RAM to store 112 x 80-dot bit pattern data in the graphics display mode. Here,
display patterns are directly written into CGRAM. Character codes set in the DDRAM are not used. For
details, see the Graphics Display section.
The CGRAM stores the bit-pattern data in the superimposed display mode as well as in the graphics display
mode. Here, the CGRAM cannot be used for displaying the user font pattern as the character. For details,
see the Superimposed Display Function section.
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| HD66730 | Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅動器) |
| HD66731 | Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅動器) |
| HD66731A00TB0L | 122 x 32 pixel format, Compact LCD size |
| HD66731A00TA0L | Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HD66731A01TA0L | Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HD66729 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions |
| HD66730 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HD66730A00FS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HD66730A01FS | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HD66731 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
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