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参数资料
型号： ST92186B3BK
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32
封装： PLASTIC, SDIP-32
文件页数： 10/148页
文件大小： 1664K
代理商： ST92186B3BK
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ST92186B - ON SCREEN DISPLAY CONTROLLER (OSD)
OSD CONTROLLER (Cont’d)
Bit 1 = ROU
Rounding control bit
This bit enables or disables the rounding for the
whole row.
0: the rounding is disabled
1: the rounding is enabled
Note: For a 18x26 matrix size, there is no rounding
when the character size is (1X,1Y). For any other
(X,Y) size combinations, the rounding is possible
for the 18x26 font matrix.
Bit 0 = FR
Fringe control bit
This bit enables or disables the fringe for the whole
row. The fringe mechanism can be activated for
any size and matrix format.
0: the character fringe is disabled
1: the character fringe is enabled.
Note: In case of fringe usage in 1Y vertical size
and interlaced mode, a flicker may appear on
screen as the fringe information is built on a field
basis.
7.4.7.4 Active Range
Address in Segment 22h: 2p + 5. See Figure 52.
The active range feature is useful for software con-
trolled smooth vertical scrolling (up or down).
For each row to be displayed, the first line (RS)
and the last line (RE) to be displayed for the cur-
rent row have to be specified.
The two values (RS[3:0] and RE[3:0]) are com-
pared to the row line counter value. If the value of
the counter is outside the active range (less than
RS[3:0] or greater than or equal to RE[3:0]), the
border color is displayed as defined by its at-
tributes. Otherwise, if the counter value is inside
the active range, the normal character pixel
processing and display is done (See Figure 58).
Let’s assume that the start address of the current
row buffer is 2p (even address).
Bits 7:4 = RS[3:0]
Active Range Start value
The RS[3:0] value range is 0h-Ch (0-12) in all cas-
es (9x13 or 18x26 character matrix).
Bits 3:0 = RE[3:0]
Active Range End value
The RE[3:0] value range is 1h-Dh (1-13) in all cas-
es (9x13 or 18x26 character matrix).
Note: For 18x26 matrix characters, the active
range is calculated by pair of TV lines, i.e. the ac-
tive range always starts on the first field and finish-
es on the second field (in interlaced mode).
In case of non-interlaced display mode, the active
range is calculated by pair of TV lines.
Figure 58. Active Range Example
70
RS3
RS2
RS1
RS0
RE3
RE2
RE1
RE0
0
1
2
3
4
5
6
7
8
9
10
11
12
RS = 0 ; RE = 13
RS = 4 ; RE = 9
ACTIVE RANGE EXAMPLE
Pixel not
displayed
相关PDF资料
PDF描述
ST92195B2T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
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