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H8S/2648, H8S/2648R, H8S/2647
The relationship between the LCD RAM and the display segments differs according to the duty
cycle. LCD RAM maps for the different duty cycles are shown in figures 18-7 to 18-10.
After setting the registers required for display, data is written to the part corresponding to the duty
using the same kind of instruction as for ordinary RAM, and display is started automatically when
turned on. Word- or byte-access instructions can be used for RAM setting.
SEG2
H'FC40
H'FC53
SEG40
COM4
646
Bit 7
Bit 6
Bit 5
SEG2
SEG2
SEG40 SEG40 SEG40
COM3
COM2
Figure 18-7 LCD RAM Map (1/4 Duty)
Bit 4
Bit 3
Bit 2
SEG2
SEG1
SEG1
SEG39
SEG39
COM1
COM4
COM3
Bit 1
Bit 0
SEG1
SEG1
SEG39 SEG39
COM2
COM1
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