Epson S1D13705 technical manual Comparison Between Default and Alternate SwivelView Modes

Epson Research and Development	Page 81
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12.3 Comparison Between Default and Alternate SwivelView Modes

Table 12-1: Default and Alternate SwivelView Mode Comparison

Item	Default SwivelView Mode	Alternate SwivelView Mode
	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
Memory Requirements	320x480x4bpp image would normally require only	Does not require a virtual image.
	76,800 bytes - possible within the 80K byte
	address space, but the virtual image is
	512x480x4bpp which needs 122,880 bytes - not
	possible.
		MCLK, and hence CLK, need to be 2x PCLK. For
		example, if the panel requires a 3MHz PCLK,
Clock Requirements	CLK need only be as fast as the required PCLK.	then CLK must be 6MHz. Note that 25MHz is the
		maximum CLK, so PCLK cannot be higher than
		12.5MHz in this mode.
Power Consumption	Lowest power consumption.	Higher than Default Mode.
Panning	Vertical panning in 2 line increments.	Vertical panning in 1 line increments.
Performance	Nominal performance.	Higher performance than Default Mode.

12.4 SwivelView Mode Limitations

The only limitation to using SwivelView mode on the S1D13705 is that split screen operation is not supported.

Hardware Functional Specification	S1D13705
Issue Date: 02/02/01	X27A-A-001-10