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參數資料
| 型號： | MC68HC705L16 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數： | 2/28頁 |
| 文件大小： | 139K |
| 代理商： | MC68HC705L16 |
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Application Note
AN1763
2
MOTOROLA
Liquid Crystal Displays
To understand the types of waveforms that drive LCD displays, it is
helpful to understand a few fundamentals about LCDs.
For example, liquid crystal displays are composed of a polarizing liquid
crystalline material in between two plates of glass. Typically, one plate
is called the common or backplane, and the other is called a segment or
frontplane. In a reflective LCD panel (one that has no back light), a
voltage difference applied across the two electrodes will result in a
polarization which will prevent the light from reflecting back to the
observer. This will appear as a dark segment and is, therefore,
considered ON. A lack of voltage difference will allow the light to reflect
back and is considered OFF.
Contrast
Due to the chemical nature of the liquid crystal material, DC voltages
cannot be used to drive the segments or else permanent damage can
occur to the LCD. To avoid this problem, voltage levels are applied to the
electrodes for a short period and then the levels are reversed to the
electrodes for an equal period. This AC waveform will produce an RMS
voltage across the LCD, yet it has a net DC value of 0 volts. As a result,
LCD material has its contrast specified in terms of an RMS voltage. A
typical voltage characteristic for a reflective LCD display is shown in
Figure 1
.
The ON voltage for a segment should be greater than the point where
incident light is reduced by 90 percent. The OFF voltage should be less
than the point where incident light is reduced by 10 percent. For
maximum contrast, the ratio of ON to OFF voltage should be as large as
possible. Examples of how to calculate RMS voltages are shown in a
later section.
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| MC68HC705S | HCMOS Microcontroller Unit |
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| MC68HC711J6 | 8-BIT MICROCONTROLLER |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC705L32FU | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
| MC68HC705L5FUE | 功能描述:8位微控制器 -MCU 705L5-EPP-80QFP-6019 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| MC68HC705MC4CDW | 制造商:Motorola 功能描述:MOTOROLA S7D9B |
| MC68HC705P6ACDW | 功能描述:8位微控制器 -MCU 8 Bit 2.1MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| MC68HC705P6ACP | 功能描述:IC MCU 2.1MHZ 4.5K OTP 28-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數:26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數據轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
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