S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 86

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 80
12.3 Comparison Between Default and Alternate SwivelView Modes
12.4 SwivelView Mode Limitations
S1D13705
X27A-A-001-09
Memory Requirements
Clock Requirements
Power Consumption
Panning
Performance
Item
The width of the rotated image must be a power
of 2. In most cases, a virtual image is required
where the right-hand side of the virtual image is
unused and memory is wasted. For example, a
320x480x4bpp image would normally require only
76,800 bytes - possible within the 80K byte
address space, but the virtual image is
512x480x4bpp which needs 122,880 bytes - not
possible.
CLK need only be as fast as the required PCLK.
Lowest power consumption.
Vertical panning in 2 line increments.
Nominal performance.
The only limitation to using SwivelView mode on the S1D13705 is that split screen
operation is not supported.
Table 12-1: Default and Alternate SwivelView Mode Comparison
Default SwivelView Mode
Does not require a virtual image.
MCLK, and hence CLK, need to be 2x PCLK. For
example, if the panel requires a 3MHz PCLK,
then CLK must be 6MHz. Note that 25MHz is the
maximum CLK, so PCLK cannot be higher than
12.5MHz in this mode.
Higher than Default Mode.
Vertical panning in 1 line increments.
Higher performance than Default Mode.
Alternate SwivelView Mode
Epson Research and Development
Hardware Functional Specification
Vancouver Design Center
Issue Date: 01/05/22