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BPTn
BON1
BON0
BPTn
BON1
BON0
Note: * Do not set (start) or (end).
29.3.6
Character Data ROM (OSDROM)
The character data ROM (OSDROM) contains 384 character types, each consisting of 12 dots by
18 lines. User programs can write individual character data sets. However, character code H'000 is
fixed as a blank character, and a new character pattern for this code cannot be set by the user.
The character data ROM (OSDROM) is referenced by character codes in the display data RAM,
and dots of display character data are read for each scanning line.
This character data ROM can be accessed by the CPU as part of user ROM. For details, refer to
section 29.11, Character Data ROM (OSDROM) Access by CPU.
The memory map appears in figure 29.7. An example of configuration for a single character
appears in figure 29.8.
0
0
0
0
0
1
1
1
0
0
0
0
Figure 29.6 Button Display Examples
0
0
0/1*
1
0/1*
0
1
1
1
0
1
0
0
0
0
1
0
1
1
1
0
1
1
0
Rev. 1.0, 02/00, page 831 of 1141
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