Chapter 15 Liquid Crystal Display (LCD40F4BV3) Block Description
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
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Freescale Semiconductor
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LCD RAM – contains the data to be displayed on the LCD. Data can be read from or written to the
display RAM at any time.
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Frontplane Drivers – consists of 40 frontplane drivers.
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Backplane Drivers – consists of 4 backplane drivers.
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Voltage Generator – Based on voltage applied to VLCD, it generates the voltage levels for the
timing and control logic to produce the frontplane and backplane waveforms.
15.1.1
Features
The LCD40F4BV3 includes these distinctive features:
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Supports five LCD operation modes
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40 frontplane drivers
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4 backplane drivers
— Each frontplane has an enable bit respectively
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Programmable frame clock generator
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Programmable bias voltage level selector
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On-chip generation of 4 different output voltage levels
15.1.2
Modes of Operation
The LCD40F4BV3 module supports five operation modes with different numbers of backplanes and
different biasing levels. During wait mode the LCD operation can be suspended under software control.
Depending on the state of internal bits, the LCD can operate normally or the LCD clock generation can be
turned off and the LCD40F4BV3 module enters a power conservation state.
This is a high level description only, detailed descriptions of operating modes are contained in
Section 15.4.2, “Operation in Wait Mode”
Section 15.4.3, “Operation in Stop Mode”
.
15.1.3
Block Diagram
is a block diagram of the LCD40F4BV3 module.
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Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
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