ST92185B STMicroelectronics, ST92185B Datasheet - Page 99

• Manufacturer Part Number: ST92185B
• Description: 16k/24k/32k Rom Hcmos Mcu With On-screen-display
• Manufacturer: STMicroelectronics

ON SCREEN DISPLAY (Cont’d)
Table 17. Serial Attribute Codes
Notes:
(1) Presumed at the start of each display row or
can be defined in global register
(2) Action “set at” (on current character) others are
“set after” (on next character)
(3) ALWAYS active (even in Full Page Serial
Mode, i.e. for Text Level 1)
(4) Toggles action if the Fringe Enable is set (bit 5
in register DCM0R R250 (FAh) Page 32. Selects a
second G0 if the Switch Enable bit is set (bit 5 in
register NCSR R245 (F5h) Page 32)
Flash: (/= Steady) The next characters are dis-
played with the foreground color alternatively
equal to background and foreground on a period
based on Vsync (32 Vsync: foreground, 16 Vsync:
background) until a Steady serial attribute.
Fringe: If the Fringe Enable bit is set in the global
attribute register DCM0R R250 (FAh) Page 32, the
next characters are displayed with a black fringe
(half dot) until the decoding of another fringe at-
tribute coded 1Bh (toggle effect).
Conceal: (/= Reveal) The next characters are dis-
played as space characters (Background color)
until a foreground color character is encountered.
Conceal mode is set by the conceal enable control
bit in the register DCM0R R250 (FAh) Page 32.
Boxing: A part of the page (where this bit is active)
is inserted in a specific window depending on 3
control bits defined in the FSCCR register. (see
Figure
b[2:0]
11)
000
001
010
011
100
101
110
111
b[7:3]
Foreground Color
(Alpha Chars)
White (1)
Magenta
00000
Yellow
Green
Cyan
Black
Blue
Red
Normal Height (1,2)
Double Height
Steady (1, 2)
Box OFF (1)
Box ON
00001
Flash
To respect the Teletext Norm, the box in serial
mode, starts when two Box-on attributes are en-
countered, and stops when two Box-offs are en-
countered.
Double Height: The upper halves of the charac-
ters are displayed in the current row, the corre-
sponding lower halves of characters are displayed
(with same display attributes) in the next row (in-
formation received for this row must be ignored).
Note: When a serial double height attribute is de-
coded in Row 23, the characters of the first status
row are not displayed. To avoid this effect, remove
the serial double height attribute from Row 23.
Figure 58. Mosaic Characters
Note: Hold Mosaic: (/= Release) The last mosaic
character is repeated once instead of the current
space character.
ST92185B - ON SCREEN DISPLAY (OSD)
Contiguous Mosaic
Foreground Color
(Mosaic Chars)
Black (3)
Magenta
00010
Yellow
Green
White
Cyan
Blue
Red
Fringe or 2nd G0 font (3, 4)
Contiguous Mosaic (1, 2)
Black Background (1, 2)
Separated Mosaic (2)
New Background (2)
Release Mosaic (1)
Hold Mosaic (2)
Separated Mosaic
Conceal (2)
00011
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