M37221M4H_15 Datasheet, PDF (64/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
8.11.2 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 8.11.8 shows 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 8.11.2 shows the relation
between the set values in the character size register and the charac-
ter sizes.
Character Size Register
b7 b6 b5 b4 b3 b2 b1 b0
Character size register (CS) [Address 00E416]
B
Name
Functions
0, 1 Character size of block 1
selection bits
(CS10, CS11)
00 : Minimum size
01 : Medium size
10 : Large size
11 : Do not set.
2,3 Character size of block
2selection bits
(CS20,CS21)
00 : Minimum size
01 : Medium size
10 : Large size
11 : Do not set.
4 Nothing is assigned. These bits are write disable bits.
to
7
When these bits are read out, the values are “0.”
After reset R W
Indeterminate R W
Indeterminate R W
0
R—
Fig. 8.11.8 Character Size Register
Rev.1.00 Oct 01, 2002 page 62 of 110
REJ03B0134-0100Z