m35060 Renesas Electronics Corporation., m35060 Datasheet - Page 23

• Manufacturer Part Number: m35060
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

(3) Compounding character ROM and SYRAM
Fig. 10 Compounding example
22
You can compound characters in character ROM with SYRAM.
The compounding method is determined by the SYEX color ex-
pansion bit and the HIDE register (address 2AA
For dot lines where SYEX = 0, the SYRAM color is set by the dis-
play RAM’s SR, SG, and SB irrespective of the HIDE register’s
content.
If the HIDE register’s content is 0, the SYRAM color for dot lines
where SYEX = 1 is set by the LINER, LINEG, and LINEB regis-
ters (address 2AC
When HIDE = 1, the character ROM’s contents for dot lines where SYEX = 1 become invisible.
register HIDE
Contents of
Ex. 1
Ex. 2
16
).
SYEX
SYEX
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
Character ROM
0 (normal mode)
16
).
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
LINER,
LINEG,
LINEB
SR,
SG,
SB
SR,
SG,
SB
If the HIDE register’s content is 1, the character ROM part of the
dot lines where SYEX = 1 is overwritten in HIDE mode with colors
set by the LINER, LINEG, and LINEB registers irrespective of the
ROM’s content and color. The color of the SYRAM part is set by
the display RAM’s SR, SG, and SB as in the case of dot lines
where SYEX = 0.
Figure 10 shows an example for each instance of compounding.
Compounding
SYEX
SYEX
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
MITSUBISHI MICROCOMPUTERS
1 (HIDE mode)
M35060-XXXSP
SYRAM
LINER,
LINEG,
LINEB
SR,
SG,
SB
SR,
SG,
SB