Toshiba TLCS-900/H1 Series Data Book page 324

3.14.3.2 Memory Space (Common spec. SR and TFT mode)
The LCDC can display the LCD panel image which is divided horizontally into 3 parts; upper,
middle and lower. Each area calls A, B and C area that has some characteristics showing
below.
Start/End address of each area in the physical memory space can be defined in the LCD
Start/End address registers. C area can be defined only start address.
A and B areas are programmable visibility and they are set enable or not in START
ADDRESS register and ROW NUMBER register. When ROW NUMBER register of A and B
area set to 0, the C area take over all panel space.
When the size of A or B area is greater than LCD panel, the area of the panel is all C area
because the displaying priority is A > B > C. If the A area set to enable while the panel area is
defined as all C area (that is A and B area are disable), C area is shifted to under the LCD
panel and A area is inserted from the top of the LCD panel. Similarly if the B area set to enable
while the panel area is defined as all C area , B area is inserted from the bottom of the C area
overlapping .
Logic Address
400000H
Ya A area
B area
Yb
Row
address
C area
Yc
Horizontal pan
600000H
Memory mapping from physical memory to LCD panel
Under Development
Memory Map
Reserved area for Horizontal pan of C area
Image
* Display data cannot input closely when you
don't use the Pan function.
Column address
Vertical pan
2X
92CH21-320
TMP92CH21
LCD PANEL
Image
X
A area Ya
C area
Yc
B area
Yb