參數(shù)資料
型號: M37281MAH-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP52
封裝: PLASTIC, SHRINK, DIP-52
文件頁數(shù): 141/158頁
文件大?。?/td> 1472K
代理商: M37281MAH-XXXSP
83
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
M37281MAH–XXXSP,M37281MFH–XXXSP
M37281MKH–XXXSP,M37281EKSP
8.11.6 Memory for OSD
There are 2 types of memory for OSD : OSD ROM (addresses
1080016 to 157FF16 and 1800016 to 1ACFF16) used to specify char-
acter dot data and OSD RAM (addresses 070016 to 07A716 and
080016 to 0FDF16) used to specify the kinds of display characters,
display colors, and SPRITE display. The following describes each
type of memory.
Fig. 8.11.20 Character Font Data Storing Address
(1) OSD ROM (addresses 1080016 to 157FF16, 1800016 to
1ACFF16)
The dot pattern data for OSD characters is stored in the charac-
ter font area in the OSD ROM and the CD font data for OSD
characters is stored in the color dot font area in the OSD ROM.
To specify the kinds of the character font and the CD font, it is
necessary to write the character code into the OSD RAM.
The modes are selected by bit 3 of the OSD control register 3 for
each screen.
The character font data storing address is shown in Figure 8.11.20.
The CD font data storing address is shown in Figure 8.11.21.
The 510 kinds of character font and 62 kinds of CD font can be
stored.
Character font
Line
number
0216
0916
0316
0416
0516
0616
0716
0816
1116
0B16
0C16
0D16
0E16
0F16
1016
1516
1216
1316
1416
Left area
Right area
b0
b7
b0
b7
0A16
OSD ROM address of character font data
AD16 AD15 AD14 AD13 AD12 AD11 AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
OSD ROM
address bit
1
Line number
Area
bit
Line number /
Character code /
Area bit
Character code
0
Line number = “0216” to “1516
Character code = “0016” to “1FF16” (“0FF16” and “10016” can not be used. Write “FF16” to corresponding addresses.)
Area bit = 0: Left area
1: Right area
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