ST92196A STMicroelectronics, ST92196A Datasheet - Page 132

• Manufacturer Part Number: ST92196A
• Description: 8/16-bit Mcu For Tv Applications With Up To 96k Rom, On-screen-display And 1 Or 2 Data Slicers
• Manufacturer: STMicroelectronics

OSD CONTROLLER (Cont’d)
8.5.6.1 Underline Color Set 1 (USC1)
Address in Segment 22h: 04h (Bits 15:8), 05h (Bits 7:0)
To support “windows-like” button effects, the color
of the 2 (or 4 in 18x26 matrix) bottom dot lines of a
character row may be defined using the Underline
attributes. Two dedicated 2-byte words define 2
color sets, “Underline color set 1” called “UCS1”
and “Underline color set 2” called “UCS2”. They
are used by the Underline mode in addition to the
current foreground color.
This provides a four color choice for both rows 12
and 13 (9x13 character matrix) or pair of rows 23-
24 and 25-26 (18x26 character matrix): none
(background), foreground, UCS1 or UCS2, as
shown in
The UCS1 data is mapped in a fixed OSDRAM lo-
cation (See
Bits 15:12 = Free for the user
Bits 11:9 = U1T[2:0] Underline color set 1 Translu-
cency
These bits configure the background translucency
level applied to the color (refer to
for more details).
U1T[2:0] = 7 means that this color will be fully
opaque (no video mixed in it on the display)
U1T[2:0] = 0 means that this color will be fully
transparent (the video is displayed instead of this
color)
15
Table
Figure
24.
59).
U1T2
U1T1
Section 8.5.3.11
U1T0 U1R2 U1R1
8
- ON SCREEN DISPLAY CONTROLLER (OSD)
7
Bits 8:6 = U1R[2:0] Underline color set 1 Red
color
These bits configure the background red intensity
for the color.
U1R[2:0] = 0 means that no red is used to define
the color.
U1R[2:0] = 7 means that the maximum red intensi-
ty is used in the color.
Bits 5:3 = U1G[2:0] Underline color set 1 Green
color
These bits configure the background green inten-
sity for the color.
U1G[2:0] = 0 means that no green is used to de-
fine the color.
U1G[2:0] = 7 means that the maximum green in-
tensity is used in the color.
Bits 2:0 = U1B[2:0] Underline color set 1 Blue
color
These bits configure the background blue intensity
for the color.
U1B[2:0] = 0 means that no blue is used to define
the color.
U1B[2:0] = 7 means that the maximum blue inten-
sity is used in the color.
U1R0
U1G2
U1G1
U1G0
U1B2
U1B1 U1B0
0
132/268