Character Border Function; Fig. 2.11.15 Border Example; Fig. 2.11.16 Border Selection Register (Address 00E5 16 ); Table 2.11.6 Relationship Between Set Value Of Border Selection Register And Character Border Function - Renesas 7200 Series User Manual

2.11.6 Character border function

An border of 1 clock (1 dot) equivalent size can be
added to a display character in both horizontal and
vertical directions. The border is output from pin
OUT 1. In this case, set bit 5 of a color register to
"0" (character is output).
Border can be specified each block by the border
selection register (address 00E5
shows the relationship between the set values of
the border selection register and the character border
function. Figure 2.11.16 shows the border selection
register.

Table 2.11.6 Relationship between set value of border selection register and character border function

Border selection register
MDn0
0
1
Border Selection Register
b7 b6 b5 b4 b3 b2 b1 b0
Fig. 2.11.16 Border selection register (address 00E5
FUNCTIONAL DESCRIPTION
). Table 2.11.6
16
Functions
Ordinary
Border including
character
Border selection register (MD) [Address 00E5
B Name
0 Block 1 OUT1 output
border selection bit (MD10)
1 Nothing is assigned. This bit is a write disable bits.
When this bit is read out, the value is "0."
2 Block 1 OUT1 output
border selection bit (MD20)
3
Nothing is assigned. These bits are write disable bits.
to
When these bits are read out, the values are "0."
7
7220 Group User's Manual
2.11 CRT display function

Fig. 2.11.15 Border example

Example of output
R, G, B output
OUT1 output
R, G, B output
OUT1 output
]
16
Functions
0 : Same output as character output
1 : Border output
0 : Same output as character output
1 : Border output
)
16
Character
data dots
Border dots
After reset R W
Indeterminate R W
0
R —
Indeterminate R W
0 R —
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