Relationship Between Lcd Ram And Display - Hitachi H8/3827R Series Hardware Manual

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Relationship between LCD RAM and Display

The relationship between the LCD RAM and the display segments differs according to the duty

cycle. LCD RAM maps for the different duty cycles when segment external expansion is not used

are shown in figures 13.5 to 13.8, and LCD RAM maps when segment external expansion is used

in figures 13.9 to 13.12.

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.

Figure 13.5 LCD RAM Map when Not Using Segment External Expansion (1/4 Duty)