ST92196A STMicroelectronics, ST92196A Datasheet - Page 135

• 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)
Table 24. Underline Mode Control Bits Description
Note: Take care when changing (or stopping) un-
derline mode for a character, when the back-
ground color is displayed with “underline mode
change in the center of the character” (M bit in
Background palette).
In this case, the underline doesn’t stop at the end
of the character but stops in the middle of the fol-
lowing character. The underline color used is the
last background color displayed in the current pixel
line.
135/268
- ON SCREEN DISPLAY CONTROLLER (OSD)
U2
0
0
0
0
1
1
1
1
U1
0
0
1
1
0
0
1
1
U0
0
1
0
1
0
1
0
1
Underline color for a 9x13 dot matrix
No underline
Line 12: foreground color
Line 13: underline color set 1
Line 13: underline color set 2
Line 12-13: underline color set 1
Line 12-13: underline color set 2
Line 12: underline color set 1; line 13: underline
color set 2
Line 12: underline color set 2; line 13: underline
color set 1
This always happens, when changing underline
mode in the following ways:
– From THICK to THIN or no underline
– From one THIN color to another when the under-
(THICK underline, in a 9 x 13 matrix, is underlining
on 2 lines and, in a 18 x 26 matrix, on 4 lines.
THIN underline, in a 9 x 13 matrix, is underlining
on 1 line and, in a 18 x 26 matrix, on 2 lines.)
lining is not on the same line.
Underline color for a 18x26 dot matrix
No underline
Lines 23-24: foreground color
Lines 25-26: underline color set 1
Lines 25-26: underline color set 2
Lines 23-24-25-26: underline color set 1
Lines 23-24-25-26: underline color set 2
Lines 23-24: underline color set 1; lines 25-26:
underline color set 2
Lines 23-24: underline color set 2; lines 25-26:
underline color set 1