M37221M6_03 Datasheet, PDF (37/62 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37221M6-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
(3) Character Size
The size of characters to be displayed can be from 3 sizes for each
block. Use the character size register (address 00E416) to set a char-
acter size. The character size of block 1 can be specified by using
bits 0 and 1 of the character size register; the character size of block
2 can be specified by using bits 2 and 3. Figure 38 shows the struc-
ture of the character size register.
The character size can be selected from 3 sizes: minimum size, me-
dium size and large size. Each character size is determined by the
number of scanning lines in the height (vertical) direction and the
oscillating cycle for display (TC) in the width (horizontal) direction.
The minimum size consists of [1 scanning line] ! [1TC]; the medium
size consists of [2 scanning lines] ! [2TC]; and the large size con-
sists of [3 scanning lines] ! [3TC]. Table 9 shows the relation be-
tween the set values in the character size register and the character
sizes.
7
0
Character size register
(CS : address 00E416)
Character size of block 1
selection bits
0 0 : Minimum size
0 1 : Medium size
1 0 : Large size
1 1 : Do not set.
Character size of block 2
selection bits
0 0 : Minimum size
0 1 : Medium size
1 0 : Large size
1 1 : Do not set.
Fig. 38. Structure of character size register
Mini-
mum
Medium
Large
Horizontal display start position
Fig. 39. Display start position of each character size (horizontal direction)
Table 9. Relation between set values in character size register and character sizes
Set values of character size register
CSn1
0
0
CSn0
0
1
1
0
1
1
Character
size
Minimum
Medium
Large
Width (horizontal) direction
TC: oscillating cycle for display
1TC
2TC
3TC
This is not available
Height (vertical) direction
scanning lines
1
2
3
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 39).
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