FEDL87V3104-03
OKI Semiconductor
ML87V3104
2. Display Control
2.1 Display section
The display section of the ML87V3104 is composed of the display memory, the cursor and cursor color registers,
the color palette, the FRC table, and output format conversion section. (Fig. F2.1)
The color display in the case of 4 bits/pixel and 8 bits/pixel can be made using, respectively, 16 and 256 colors out
of 4096 colors. (Pseudo-color mode)
Further, in the STN mode, the output is made after conversion into the gradation expression data in the FRC
method.
In the case of 16 bits/pixel, the output is made directly without passing through the color palette. (Direct color
mode)
In the STN mode, out of the total 16 bits, only 4 bits each of RGB (12 bits in all) will be valid and display 4096
colors can be made.
In the TFT mode, the 16 bits are divided into 5 bits of R, 6 bits of G, and 5 bits of B, making it possible to display
65536 colors.
Even the direct mode can also be used in the case of 8 bits/pixel.
Display memory
4
4
4
1
4
8/16
DDA3-0
DDB3-0
DDC3-0
DDD3-0
SEL
SEL
SEL
512 × 8b
Color
palette
FRC
Table
Output
format
conversion
1
4
8
SEL
256 × 12b
16 × 16b
Cursor
pattern
register
Color
register
1
4
2
8
16 × 16 × 2b
3 × 8b
4
Cursor
display
control
8/16
Fig. 2.1 The display section
7/69
OKI [ OKI ELECTRONIC COMPONETS ]
