參數(shù)資料
型號: M37161MA-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁數(shù): 105/129頁
文件大?。?/td> 1092K
代理商: M37161MA-XXXSP
Rev.1.00
2003.11.25
page 77 of 128
M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
8.10.13 Window Function
This function sets the top and bottom boundaries for display limits
on a screen. The window function is valid only in the OSD1 mode.
The top boundary is set by the window register 1 and bit 7 of block
control register 1. The bottom boundary is set by window register 1
and bit 7 of block control register 2. This function is turned on and off
by bit 2 of the OSD control register (refer to Figure 8.10.3).
Window registers 1 and 2 are shown in Figures 8.10.27 and 8.10.28.
Fig. 8.10.26 Example of Window Function
8.10.12 Scan mode
The Bi-scan mode corresponds to HSYNC of twice as much frequency
as usual. The vertical display position and the vertical dot size double
compared to the normal scan mode. Scan mode can be set the ver-
tical dot size in bit 0 of OSD control register 2, and the vertical dis-
play start position in bit 1, independently .
Table 8.10.3 Setting of Scan Mode
Bit 0 of OSD control register 2
Item
Scan mode
Normal scan
Bi-scan
01
Vertical dot size
1TC 1/2H
1TC 1H
1TC 2H
2TC 2H
2TC 4H
3TC 3H
3TC 6H
Bit 1 of OSD control register 2
01
Verical display start position
A value of verical position register 1H
A value of verical position register 2H
The setting value per one step of the top and bottom window borders
can be switched to either 1TH or 2TH by setting “0” or “1” to bit 1 of
OSD control register 2 (address 02DB16).
OSD2 mode
Window
FG H
I
J
OSD1 mode
KL
M N O
OSD1 mode
PQ R
S
T
OSD1 mode
OSD2 mode
Bottom
boundary
of window
Top
boundary
of window
Screen
A BCD E
UV
W X
Y
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