641
18.3
Operation
18.3.1
Settings up to LCD Display
To perform LCD display, the hardware and software related items described below must first be
determined.
Hardware Settings
•
Using 1/2 duty
When 1/2 duty is used, interconnect pins V2 and V3 as shown in figure 18-2.
LPV
CC
V1
V2
V3
V
SS
Figure 18-2 Handling of LCD Drive Power Supply when Using 1/2 Duty
•
Panel display
As the impedance of the built-in power supply split-resistance is large, the display may lack
sharpness when driving a panel. In this case, refer to section 18.3.4, Boosting the LCD Drive
Power Supply. When static or 1/2 duty is selected, the common output drive capability can be
increased. Set CMX to 1 when selecting the duty cycle. In this mode, with a static duty cycle
pins COM4 to COM1 output the same waveform, and with 1/2 duty the COM1 waveform is
output from pins COM2 and COM1, and the COM2 waveform is output from pins COM4 and
COM3.
•
LCD drive power supply setting
With the H8S/2646 Series, there are two ways of providing LCD power: by using the on-chip
power supply circuit, or by using an external power supply circuit.
When an external power supply circuit is used for the LCD drive power supply, connect the
external power supply to the V1 pin.
Содержание H8S/2645
Страница 4: ......
Страница 16: ......
Страница 58: ...26 ...
Страница 110: ...78 ...
Страница 120: ...88 ...
Страница 132: ...100 ...
Страница 160: ...128 ...
Страница 172: ...140 ...
Страница 235: ...203 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 8 8 Memory Mapping in Block Transfer Mode ...
Страница 418: ...386 ...
Страница 444: ...412 ...
Страница 530: ...498 ...
Страница 562: ...530 ...
Страница 642: ...610 ...
Страница 662: ...630 ...
Страница 688: ...656 ...
Страница 756: ...724 ...
Страница 784: ...752 ...
Страница 812: ...780 ...
Страница 837: ...805 A 2 Instruction Codes Table A 2 shows the instruction codes ...
Страница 1152: ...1120 ...