M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
8.11.6 Border
An border of 1 clock (1 dot) equivalent size can be added to a char-
acter to be displayed in both horizontal and vertical directions. The
border is output from the OUT1 pin. In this case, set bit 5 of a color
register to “0” (character is output).
Border can be specified in units of block by using the border selec-
tion register (address 00E516). Figure 8.11.14 shows the border se-
lection register. Table 8.11.6 shows the relationship between the val-
ues set in the border selection register and the character border func-
tion.
Fig. 8.11.15 Example of Border
Border Selection Register
b7 b6 b5 b4 b3 b2 b1 b0
Border selection register (MD) [Address 00E516
]
B
0
Name
Functions
After reset
R
R
W
W
Indeterminate
Block 1 OUT1 output
0 : Same output as R, G, B is output
border selection bit (MD10) 1 : Border output
1
2
0
R
R
R
—
W
—
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
Indeterminate
Block 2 OUT1 output
border selection bit (MD20)
0 : Same output as R, G, B is output
1 : Border output
3
to
7
0
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
Fig. 8.11.14 Border Selection Register
Table 8.11.6 Relationship between Set Value in Border Selection Register and Character Border Function
Border selection register
Functions
Ordinary
Example of output
R, G, B output
OUT1 output
MDi0
0
R, G, B output
OUT1 output
1
Border including character
Note: i indicates 1or 2
Rev.1.00 Oct 01, 2002 page 70 of 110
REJ03B0134-0100Z
RENESAS [ RENESAS TECHNOLOGY CORP ]
