M306V2ME Datasheet, PDF (230/276 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V2ME-XXXFP
M306V2EEFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.16.18 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
2.16.3).
Table 2.16.12 Setting for scan mode
Parameter
Scan Mode
Bit 1 of OSD control register 1
Normal Scan
0
Vertical display start position
Value of vertical position register ! 1H
Vertical dot size
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
2.16.19 R, G, B Signal Output Control
The form of R, G, B signal output is controlled by bit 4 of the clock register and bit 2 of the OSD control
register 2 as the table below.
Table 2.16.13 R, G, B signal output control
Bit 4 of clock
control register
Bit 2 of OSD
control register 2
Form of R, G, B signal output
0
0
Each R, G, B pin outputs 2 values (digital output).
1
Each R, G, B pin outputs 8 values (analog output).
Each R, R' (P73), G, G' (P60), B, B' (P57) pin outputs 2 values.
1
(Corresponding to each signal output control bits of color palette register i)
R, G, B: CRi_1, CRi_5, CRi_9, respectively
R', G', B': CRi_0, CRi_4, CRi_8, respectively
Note: When bit 4 of the clock control register is “1,” ports P57, P60, P73 function as OSD function pins R', G', B', respectively. When
emulating, however, set bit 4 to “0.”
Rev. 1.0
230