SED1330F Datasheet, PDF (87/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

5.4
5.4 Memory to Display Relationship
The SED1330F/1335F/1336F supports virtual
screens that are larger than the physical size of the
LCD panel address range, C/R. A layer of the
SED1330F/1335F/1336F can be considered as a
window in the larger virtual screen held in display
memory. This window can be divided into two
5.0 Display Control Functions
blocks, with each block able to display a different
portion of the virtual screen.
This enables, for example, one block to dynamically
scroll through a data area while the other acts as a
status message display area. See Figure 49 and 50.
W/S = 0
Display page 1
Layer 1
Display page 2
Layer 2
SAD1
SAD3
Display page 1
Display page 3
Layer 1
SAD2
Display page 2
Layer 2
SAD3
SAD2
Display page 3
SAD1
Display page 2
Display page 1
Layer 1
Layer 2
Layer 3
AP
SAD1
C/R
Character page 1
SAD3
Character page 3
SAD2
SAD4
Character page 2
Character page 2
C/R
CG RAM
SAD1
C/R
Character page 1
C/R
SAD3 Character page 3
SAD2
C/R
Graphics page 2
SAD1
SAD3
SAD2
SAD4
W/S = 1
Display page 1
Display page 3
Layer 1
Display page 2
Display page 4
Layer 2
C/R
SAD3
Graphics page 3
C/R
SAD2 _{Graphics page 2}
C/R
SAD1
Graphics page 1
Figure 57. Display layers of memory
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