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參數(shù)資料
| 型號： | HT1647 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 4-Level Gray Scale 64 x 16 LCD Controller for I/O Μc(4級灰標、用于I/O接口微機的64 x 16模式 LCD控制器 Controller for I/O Μc) |
| 中文描述： | 4級灰度64 × 16 LCD控制器的I / O微晶（4級灰標，用于的I / O接口微機的64 × 16模式液晶顯示控制器控制的I / O微晶） |
| 文件頁數(shù)： | 10/24頁 |
| 文件大?。?/td> | 190K |
| 代理商： | HT1647 |
HT1647
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Display memory - RAM structure
Display memory
RAM structure
The static display RAM is organized into 512 4
bits and stores the display data. Two bits of
RAM map to Lad s one pixel and decide
whether 4-level gray scale or 4-color display
concurrently. The contents of the RAM are di-
rectly mapped to the contents of the LCD
driver. Data in the RAM can be accessed by the
READ, WRITE and READ-MODIFY-WRITE
commands. The following is a mapping from
the RAM to the LCD patterns.
Gray scale level decision
HT1647 uses PWM technique to provide 4-level
gray scale display. Two bits of RAM data code
((D3, D2) or (D1, D0)) decide one pixel level of
LCDs, level 1~level 4 dividedly. Every level
must be definedasonekindofgrayscalebyPWM
data (namely B4~B0) previously.
RAM data code
(D3, D2) or (D1, D0)
Choice Gray Scale
Level
(1, 1)
Level 1
(1, 0)
Level 2
(0, 1)
Level 3
(0, 0)
Level 4
RAM data defined gray scale level
Frame frequency
HT1647 provides two kinds frame frequency op-
tion by command code, 89Hz and 170Hz respec-
tively. FRAME 89Hz provides 89Hz frame
frequencyandactivesegmentsignalwidthcanbe
divided into 24 sections concurrently. FRAME
170Hz provides 170Hz frame frequency and ac-
tive segment signal width can be divided into 13
sections concurrently. The 24 sections display a
particularly gray scale more than the 13 sections
by PWM data. The default is FRAME 89Hz.
Gray scale display
If the user choose 89Hz frame frequency, a max.
of 24 sections can be programmed to suit a sat-
isfactory gray scale in every level. Similarly, if
the user choose 170Hz frame frequency, a max.
of 13 sections can be programmed to suit a satis-
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| HT16511 | 1/8 to 1/16 Duty VFD Controller |
| HT16512 | 1/4 to 1/11 Duty VFD Controller |
| HT16515 | 1/4 to 1/12 Duty VFD Controller |
| HT1660 | 96 x 32 LCD Controller for I/O MCU |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT1647(100QFP)A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference |
| HT1647_05 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:4-Level Gray Scale 64x16 LCD Controller for I/O MCU |
| HT1647_10 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:4-Level Gray Scale 6416 LCD Controller for I/O MCU |
| HT1647A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:64x16 LCD Controller for I/O MCU |
| HT1647A_11 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:64x16 LCD Controller for I/O MCU |
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