Toshiba H1 Series Data Book page 561

3.19.5.2 Display Data Rotation Function
When display RAM data is output to the LCD driver (LCDD), the data output
direction can be automatically rotated by hardware to meet the specifications of the
LCDD (or LCD module) to be used.
Item
Display size
Color mode
Supported LCDD
Display RAM
1. Horizontal and Vertical Flip Function
Normal display
Vertically flipped
The display RAM image shown above uses the data scan method for the normal
display screen so that data is read from the display RAM and written to the LCDD from
left to right and top to bottom.
The data on the LCD screen appears as "horizontally flipped" if data is read from the
display RAM from left to right and top to bottom and written to the LCDD from right to
left and top to bottom.
Likewise, the data on the LCD screen appears as "vertically flipped" if data is written
to the LCDD from left to right and bottom to top, or as "horizontally and vertically
flipped" if the data is written to the LCDD from right to left and bottom to top.
The horizontal and vertical flip function enables the output of display data to meet
the specifications of each LCDD without the need to rearrange the display RAM data.
In other words, the screen display can be flipped horizontally and vertically without
Table 3.19.2 Operation Conditions
Vertical/Horizontal Flip Function
320 × 240
64K colors (16 bpp)
TFT, STN
Internal RAM, external SRAM
Display RAM image
92CZ26A-558
90-Degree Rotation Function
320×240 → 240 × 320
64K colors (16 bpp)
TFT, STN
Internal RAM, external SRAM
Horizontally flipped
Horizontally and vertically flipped
TMP92CZ26A