ST92196A STMicroelectronics, ST92196A Datasheet - Page 139

• 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)
8.5.7.2 Mouse Pointer Vertical Position
Address in Segment 22h: 0Ah (Bits 15:8), 0Bh (Bits 7:0)
Bit 15 = MDS Mouse Double Size enable bit
This bit enables or disables the double size display
for the mouse pointer.
0: The mouse pointer is displayed in a 2Y-2X size.
1: The mouse pointer is displayed in a 4Y-4X size.
Bits 14:10 = free for the user
Bits 9:0 = MPY[9:0] Mouse Pointer vertical posi-
tion
These bits define the mouse pointer vertical start
position expressed as a “TV lines-per-field” count
(refer to
works in non-interlaced mode, all MPY bits are
used.
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- ON SCREEN DISPLAY CONTROLLER (OSD)
MDS
15
Figure
64). When the Display controller
MPY9 MPY8 MPY7 MPY6
8
7
When the Display controller works in interlaced
mode the MPY0 bit becomes meaningless The ac-
tual Mouse Pointer starting position is given by
MPY[9:1].
The minimum vertical shift is therefore a 2-pixel
step, in interlaced mode, as incrementing the
Mouse Pointer vertical position will act on both
fields, producing a one line shift per field. In non-
interlaced mode, the minimum vertical shift be-
comes a 1-pixel step.
Warning: In interlaced mode the MPY0 bit must
be forced by software to 0.
MPY5
MPY4 MPY4 MPY2 MPY1 MPY0
0