M37280MF Datasheet, PDF (103/178 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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MITSUBISHI MICROCOMPUTERS
M37280MF–XXXSP, M37280MK–XXXSP
M37280EKSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
12.11.13 Scan Mode
This microcomputer has the bi-scan mode for corresponding to HSYNC
of double speed frequency. In the bi-scan mode, the vertical start
display position and the vertical size is two times as compared with
the normal scan mode. The scan mode is selected by bit 1 of the
OSD control register 1 (refer to Figure 12.11.3).
Table 12.11.8 Setting for Scan Mode
Scan Mode
Parameter
Bit 1 of OSD Control Register 1
Vertical Display Start Position
Vertical Dot Size
Normal Scan
0
Value of vertical position register ! 1H
1TC ! 1/2H
1TC ! 1H
2TC ! 2H
3TC ! 3H
Bi-Scan
1
Value of vertical position register ! 2H
1TC ! 1H
1TC ! 2H
2TC ! 4H
3TC ! 6H
Rev. 1.0
103