437
CHAPTER 24 LCD CONTROLLER
24.2.2
External Divider Resistors for LCD Controller
Models allow external divider resistors to be connected to the V1 to V3 pins.
Also, the brightness can be adjusted by connecting a variable resistor between the V
CC
and V3 pins.
■
External Divider Resistors
If not using the internal divider resistors , you can connect external divider resistors to the LCD
drive power supply pins (V1 to V3) instead. Figure 24.2-5 shows an example of connecting
external divider resistors and Table 24.2-1 lists the LCD drive voltage settings for the bias
method.
Figure 24.2-5 Example of Connecting External Divider Resistors
V1 to V3: Voltages at V1 to V3 pins
VLCD: LCD operating voltage
Vcc
V3
V2
V1
1/2 bias
R
R
VLCD
Vcc
V3
V2
V1
1/3 bias
VR
R
R
VLCD
R
Table 24.2-1 LCD Driving Voltage Settings
V3
V2
V1
1/2 bias
VLCD
1/2 VLCD
1/2 VLCD
1/3 bias
VLCD
2/3 VLCD
1/3 VLCD
Содержание F2 MC-8FX Family
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Страница 30: ...16 CHAPTER 1 DESCRIPTION 1 FPT 64P M23 FPT 64P M24 2 For the I O circuit type refer to 1 8 I O Circuit Type ...
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Страница 35: ...21 CHAPTER 2 HANDLING DEVICES This chapter gives notes on using 2 1 Device Handling Precautions ...
Страница 38: ...24 CHAPTER 2 HANDLING DEVICES ...
Страница 39: ...25 CHAPTER 3 MEMORY SPACE This chapter describes memory space 3 1 Memory Space 3 2 Memory Map ...
Страница 43: ...29 CHAPTER 4 MEMORY ACCESS MODE This chapter describes the memory access mode 4 1 Memory Access Mode ...
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Страница 104: ...90 CHAPTER 7 RESET ...
Страница 105: ...91 CHAPTER 8 INTERRUPTS This chapter explains the interrupts 8 1 Interrupts ...
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Страница 218: ...204 CHAPTER 13 WATCH PRESCALER ...
Страница 257: ...243 CHAPTER 16 8 16 BIT COMPOSITE TIMER ...
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Страница 430: ...416 CHAPTER 23 10 BIT A D CONVERTER ...
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Страница 482: ...468 CHAPTER 25 LOW VOLTAGE DETECTION RESET CIRCUIT ...
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Страница 536: ...522 CHAPTER 28 256 KBIT FLASH MEMORY ...
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Страница 564: ...550 CHAPTER 29 EXAMPLE OF SERIAL PROGRAMMING CONNECTION ...
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Страница 599: ...585 Pin Function Index V2 LCD power supply driving pin 2 439 V3 LCD power supply driving pin 3 439 ...
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