ST92185B STMicroelectronics, ST92185B Datasheet - Page 128

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

ST92185B - ON SCREEN DISPLAY (OSD)
ON SCREEN DISPLAY (Cont’d)
Figure 82. Memory Management for Scrolling Window
128/178
Normal Height
T + 10 VSYNC
T + 15 VSYNC
T + 5 VSYNC
3 rows to be
scrolled
T0
A = First row to scroll
C= Last row to scroll
E= Extra row
Freeze off
after 5 Vsync
ROW A
ROW B
ROW C
ROW B
ROW C
ROW B
ROW C
ROW D
ROW B
ROW C
ROW D
ROW D
ROW A
ROW A
Freeze on
after 5 Vsync
ROW B
ROW C
ROW A
ROW B
ROW C
ROW B
ROW C
ROW B
ROW C
ROW D
ROW D
ROW D
ROW A
ROW A
ROW A
EER=0
EER=1
EER=0
EER=0
New TDSRAM address
after EER=1
ROW A
ROW B
ROW C
ROW B
ROW C
ROW D
ROW B
ROW C
ROW C
ROW D
ROW D
ROW A
ROW E
ROW B
NEW
TDSRAM
CONTENT
TDSRAM
CONTENT
DISPLAY
AREA
Row 24
Row 24
ROW C
ROW C
ROW D
ROW A
ROW B
ROW D
ROW B
ROW E