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參數(shù)資料
| 型號： | MCC141511A |
| 廠商： | MOTOROLA INC |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | LCD Segment Driver CMOS |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, UUC159 |
| 封裝： | 0.1143 MM PITCH, DIE-159 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大?。?/td> | 292K |
| 代理商： | MCC141511A |
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MC141511A
MOTOROLA
OPERATION OF LCD DRIVER
INTRODUCTION
The MC141511 is LCD driver with selectable 1: 32 or 1: 41 multi-
plex ratios. The device consists of the following functional blocks as
shown in the Block Diagram.
CONTROL LOGIC
- accepts the control signals from the MCU and
generates internal signals for synchronisation.
DISPLAY RAM
- stores the display data. Each bit of the display
RAM has one-to-one correspondence to a pixel of the LCD. The display
RAM is in vertical byte oriented format as shown in Figure 6 and the
way the display RAM is addressed depends on the multiplexing mode of
the LCD (Figure 8). With reference to Figure 6, the display RAM also
contains 16 bytes of memory which is in horizontal format ($280-$28F).
The display RAM is addressed when backplane reaches 41.
LEVEL SELECTOR
- consists of a switching circuit to select
appropriate voltage levels from an external voltage divider. See figure 4.
SEGMENT DRIVERS
- provides the segment driving signals to the
LCD frontplane. See Figure 7.
The LCD driver clock is derived from the 2.048KHz BPCLK
and frame frequency is 64 Hz for 1:32 multiplex and 50 Hz for 1:41
multiplex ratio. See Figure 5.
GENERATION OF LCD BIAS LEVELS
Refer to Figure 4. In order to obtain optimum contrast for LCD
panels, the bias levels should be selected such that
BIAS = R/(4R+R1) = 1/(MUX + 1)
V1/VLCD = 1/(MUX + 1)
V2/VLCD = 2/(MUX + 1)
V3/VLCD = (MUX - 1)/(MUX + 1)
V4/VLCD = MUX /(MUX + 1)
Example: Mux = 41 ----- Bias = 1: 7.4,
R = 10K, R1 = 33K, VR = 100K
Mux = 32 ----- Bias = 1: 6.6,
R = 10K, R1 = 27K, VR = 100K
相關(guān)PDF資料 |
PDF描述 |
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| MC141532 | LCD SEGMENT / COMMON DRIVER WITH CONTROLLER COMS |
| MC141533 | LCD SEGMENT / COMMON DRIVER WITH CONTROLLER COMS |
| MC141541P | Fixed-Point Digital Signal Processor 570-FCPGA -40 to 105 |
| MC141541 | Enhanced Monitor On-Screen Display |
| MC141543P | Floating Point Digital Signal Processor, Military 429-CFCBGA -55 to 115 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCC141531Z | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LCD Segment/Common Driver CMOS |
| MCC141532Z | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LCD Segment/Common Driver with Controller CMOS |
| MCC141533Z | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LCD Segment/Common Driver with Controller CMOS |
| MCC141800AZ | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LCD Segment/Common Driver |
| MCC1469 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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