HD6432646 Hitachi, HD6432646 Datasheet - Page 677
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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18.3.2
H8S/2646, H8S/2646R, H8S/2645
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 18-3 to 18-6.
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.
H'FC40
H'FC47
H'FC48
H'FC53
Relationship between LCD RAM and Display
SEG24 SEG24 SEG24 SEG24 SEG23 SEG23 SEG23 SEG23
COM4
SEG2
Bit 7
COM3
SEG2
Bit 6
Figure 18-3 LCD RAM Map (1/4 Duty)
COM2 COM1 COM4 COM3 COM2 COM1
SEG2
Bit 5
SEG2
Bit 4
SEG1
Bit 3
SEG1
Bit 2
SEG1
Bit 1
SEG1
Bit 0
Space not used
for display
Display space
643
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