436
CHAPTER 24 LCD CONTROLLER
■
Use of Internal Divider Resistors and Brightness Control
When internal divider resistors are used on a 3V model, the internal 2R resistor reduces the V1,
V2, and V3 voltages accordingly. Figure 24.2-3 shows the case when the internal divider resistors
are used.
If sufficient brightness is not achieved with the internal divider resistors in use, connect a variable
resistor (VR) externally (between the Vcc and V3 pins) to adjust the V3 voltage. Figure 24.2-4
shows an example of connecting a VR to internal divider resistors for brightness control.
Figure 24.2-3 States with Internal Divider Resistors Used
Figure 24.2-4 Brightness Control with Internal Divider Resistors Used
As the internal 2R resistor is enabled during LCD operation, connect the VR resistor in parallel with
the 2R resistor.
2R
R
R
R
LCDC enabled
N-ch
V
3
V
2
V
1
Vcc
V3
V2
V1
2R
R
R
R
LCDC enabled
N-ch
V
3
V
2
V
1
Vcc
V2
V1
1/2 bias
1/3 bias
*
*
V3
5V product
5V product
V
1
to V
3
: Voltages at V1 to V3 pins
*: 3V product only. In case of the 5V product, a voltage must be supplied to the V3 pin.
2R
R
R
R
LCDC enabled
N-ch
V
3
V
2
V
1
Vcc
V3
V2
V1
For brightness control
VR
R
R
R
LCDC enabled
N-ch
V
3
V
2
V
1
V3
V2
V1
For brightness control
VR
3V product
5V product
V
1
to V
3
: Voltages at V1 to V3 pins
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 ...
Страница 34: ...20 CHAPTER 1 DESCRIPTION ...
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 ...
Страница 56: ...42 CHAPTER 5 CPU ...
Страница 73: ...59 CHAPTER 6 CLOCK CONTROLLER ...
Страница 96: ...82 CHAPTER 6 CLOCK CONTROLLER ...
Страница 104: ...90 CHAPTER 7 RESET ...
Страница 105: ...91 CHAPTER 8 INTERRUPTS This chapter explains the interrupts 8 1 Interrupts ...
Страница 174: ...160 CHAPTER 10 TIMEBASE TIMER ...
Страница 184: ...170 CHAPTER 10 TIMEBASE TIMER ...
Страница 218: ...204 CHAPTER 13 WATCH PRESCALER ...
Страница 257: ...243 CHAPTER 16 8 16 BIT COMPOSITE TIMER ...
Страница 261: ...247 CHAPTER 16 8 16 BIT COMPOSITE TIMER ...
Страница 288: ...274 CHAPTER 16 8 16 BIT COMPOSITE TIMER ...
Страница 301: ...287 CHAPTER 17 16 BIT PPG TIMER ...
Страница 316: ...302 CHAPTER 17 16 BIT PPG TIMER ...
Страница 382: ...368 CHAPTER 21 UART SIO DEDICATED BAUD RATE GENERATOR ...
Страница 390: ...376 CHAPTER 22 I2C ...
Страница 395: ...381 CHAPTER 22 I2C ...
Страница 399: ...385 CHAPTER 22 I2C ...
Страница 430: ...416 CHAPTER 23 10 BIT A D CONVERTER ...
Страница 476: ...462 CHAPTER 24 LCD CONTROLLER ...
Страница 482: ...468 CHAPTER 25 LOW VOLTAGE DETECTION RESET CIRCUIT ...
Страница 494: ...480 CHAPTER 26 CLOCK SUPERVISOR ...
Страница 507: ...493 CHAPTER 27 REAL TIME CLOCK ...
Страница 523: ...509 CHAPTER 27 REAL TIME CLOCK ...
Страница 532: ...518 CHAPTER 27 REAL TIME CLOCK ...
Страница 536: ...522 CHAPTER 28 256 KBIT FLASH MEMORY ...
Страница 554: ...540 CHAPTER 28 256 KBIT FLASH MEMORY ...
Страница 564: ...550 CHAPTER 29 EXAMPLE OF SERIAL PROGRAMMING CONNECTION ...
Страница 595: ...581 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Страница 596: ...582 INDEX Index ...
Страница 597: ...583 INDEX ...
Страница 599: ...585 Pin Function Index V2 LCD power supply driving pin 2 439 V3 LCD power supply driving pin 3 439 ...
Страница 600: ...586 Pin Function Index ...
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