ADVANCE INFORMATION
VCT 38xxA
3.7. Display Memory
DISPLAY_TTX_POINTER. Other banks can be used
to store any kind of display data in level 1 or level 2 for-
mat. Switching between these banks is fast and can be
programmed with the command DISPLAY_POINTER.
Bank switching allows generation of OSD menus with-
out affecting the teletext display.
The TPU supports a variable number of display memo-
ries, each 4 kBytes large. One bank is used to store
the display information of the selected teletext page.
The bank location can be defined with the command
autoincrement
Row 0
Row 1
40 Byte level 1
40 Byte level 1
40-bit pointer
40-bit pointer
40 Byte level 2
40 Byte level 2
full row attr.
full row attr.
Display Bank
Row 46
40 Byte level 1
40-bit pointer
40 Byte level 2
full row attr.
Row 0
Row 1
40 Byte level 1
40 Byte level 1
40-bit pointer
40-bit pointer
40 Byte level 2
40 Byte level 2
full row attr.
full row attr.
TTX Display Bank
Row 25
40 Byte level 1
40-bit pointer
40 Byte level 2
full row attr.
SRAM
Fig. 3–10: Display memory organization (level 2)
Micronas
55
MICRONAS [ MICRONAS ]
