
ML62Q1000
Series User's Manual
Chapter 27 LCD Driver
FEUL62Q1000
27-3
27.1.3 Configuration of Bias Generation Circuit
The bias generation circuit operation is selectable from the following four types.
(1) Internal boosting type:
Boost the voltage (V
L1
) generated from the internal voltage regulator circuit using the capacitor (C
12
) to output the
LCD driving voltages (V
L1
to V
L3
).
The display contrast can be adjusted in 32 levels using LCN4 to LCN0 bits.
(2) Internal capacitive dividing type:
Connect V
L3
to V
DD
internally and generate V
L2
and V
L1
by the means of capacitance voltage division using the
capacitor (C
12
).
(3) External supply capacitive dividing type:
Supply a voltage to V
L3
externally and generate V
L2
and V
L1
by the means of capacitance voltage division using the
capacitor (C
12
).
(4) External supply type:
Supply voltages to V
L1
to V
L3
externally.
Setting the BSON bit of the bias circuit control register (BIASCON) to "1" starts the bias generation circuit operation.
For the internal boosting type, the display contrast can be adjusted in 32 levels using LCN4 to LCN0 bits.
Figure 27-2 shows an external configuration example for each type of the bias generation circuit.
Figure 27-2 External Configuration Example of Bias Generation Circuit (1)
Boosting/
dividing
circuit ON
V
L2
V
L1
V
SS
V
DD
Voltage
regulator
circuit ON
C
L3
C
L2
C
L1
V
L3
C
2
C
1
C
12
To LCD driver
(V
L1
to V
L3
)
(1) Internal boosting type
OFF
LCD control
Block
Boosting/
dividing
circuit ON
V
L2
V
L1
V
SS
V
DD
Voltage
regulator
circuit OFF
C
L3
C
C
V
L3
C
2
C
1
C
12
To LCD driver
(V
Ll
to V
L3
)
(2) Internal capacitive dividing type
ON
LCD control
Block
Содержание ML62Q1000 Series
Страница 17: ...Chapter 1 Overview...
Страница 112: ...Chapter 2 CPU and Memory Space...
Страница 154: ...Chapter 3 Reset Function...
Страница 166: ...Chapter 4 Power Management...
Страница 196: ...Chapter 5 Interrupts...
Страница 248: ...Chapter 6 Clock generation Circuit...
Страница 274: ...Chapter 7 Low Speed Time Base Counter...
Страница 291: ...Chapter 8 16 Bit Timer...
Страница 320: ...Chapter 9 Functional Timer FTM...
Страница 382: ...Chapter 10 Watchdog Timer...
Страница 402: ...Chapter 11 Serial Communication Unit...
Страница 456: ...Chapter 12 I2 C Bus Unit...
Страница 491: ...Chapter 13 I2 C Master...
Страница 512: ...Chapter 14 DMA Controller...
Страница 531: ...Chapter 15 Buzzer...
Страница 550: ...Chapter 16 Simplified RTC...
Страница 559: ...Chapter 17 GPIO...
Страница 594: ...Chapter 18 External Interrupt Function...
Страница 612: ...Chapter 19 CRC Generator...
Страница 632: ...Chapter 20 Analog Comparator...
Страница 644: ...Chapter 21 D A Converter...
Страница 655: ...Chapter 22 Voltage Level Supervisor...
Страница 676: ...Chapter 23 Successive Approximation Type A D Converter...
Страница 709: ...Chapter 24 Regulator...
Страница 714: ...Chapter 25 Flash Memory...
Страница 743: ...Chapter 26 Code Option...
Страница 750: ...Chapter 27 LCD Driver...
Страница 788: ...Chapter 28 On Chip Debug Function...
Страница 795: ...Chapter 29 Safety Function...
Страница 813: ...Appendix A...
Страница 881: ...Revision History...