Character Size; Fig. 2.11.8 Character Size Register (Address 00E4 16 ); Fig. 2.11.9 Display Start Position (Horizontal Direction) For Each Character Size; Table 2.11.2 Relationship Between Set Value In Character Size Register And Character Size - Renesas 7200 Series User Manual

2.11.2 Character size

The size of characters to be displayed can select from 3 sizes for each block. Set a character size by the
character size register (address 00E4
The character size in block 1 can be specified by bits 0 and 1 of the character size register; the character
size in block 2 can be specified by bits 2 and 3. Figure 2.11.8 shows the character size register.
Character Size Register
b7 b6 b5 b4 b3 b2 b1 b0
Fig. 2.11.8 Character size register (address 00E4
The character size can select three sizes: minimum
size, medium size, and large size. Each character
size is determined with the number of scanning lines
in the height (vertical) direction and the oscillation
cycle for display (= T
direction.
The minimum size consists of [1 scanning line]
T ]; the medium size consists of [2 scanning lines]
C
[2 T ]; and the large size consists of [3 scanning
C
lines] [3 T ]. Table 2.11.2 shows the relationship
C
between the set values in the character size register
and the character sizes.
Table 2.11.2 Relationship between set value in character size register and character sizes
Set values in character size register
CSn1 CSn0
0
0
1
1
Note: The display start position in the horizontal direction is not affected by the character size. In other
words, the horizontal display start position is common to all blocks even when the character size
varies with each block (refer to "Figure 2.11.9").
).
16
Character size register (CS) [Address 00E4
B
0, 1 Character size of block 1
selection bits
(CS10, CS11)
Character size of block 2
2,3
selection bits
(CS20,CS21)
4
Nothing is assigned. These bits are write disable bits.
to
When these bits are read out, the values are "0."
7
) in the width (horizontal)
C
Character size
0
Minimum
1 Medium
0
Large
This is not available.
1
7220 Group User's Manual
FUNCTIONAL DESCRIPTION
16
Name Functions
00 : Minimum size
01 : Medium size
10 : Large size
11 : Do not set.
00 : Minimum size
01 : Medium size
10 : Large size
11 : Do not set.
)
16
Display start
position
[1
Fig. 2.11.9 Display start position (horizontal
direction) for each character size
Width (horizontal) direction
T : oscillation cycle for display
C
1 T
C
2 T
C
3 T
C
2.11 CRT display function
]
After reset R W
Indeterminate R W
Indeterminate R W
0 R —
Minimum size
Medium size
Large size
Height (vertical) direction
scanning lines
1 line
2 lines
3 lines
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