sed1374 ETC-unknow, sed1374 Datasheet - Page 137

• Manufacturer Part Number: sed1374
• Description: Sed1374 Embedded Memory Color Lcd Controller
• Manufacturer: ETC-unknow

Epson Research and Development
Vancouver Design Center
7.5 Limitations
Programming Notes and Examples
Issue Date: 99/04/27
Memory Requirements
Clock Requirements
Power Consumption
Panning
Performance
Item
The only limitation to using SwivelView mode on the SED1374 is that split screen
operation is not supported.
A comparison of the two SwivelView modes is as follows:
Table 7-1: Default and Alternate SwivelView Mode Comparison
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 160x240x8bpp
image would normally require only 38,400
bytes - possible within the 40K byte
address space, but the virtual image is
256x240x8bpp which needs 61,440 bytes -
not possible.
CLK need only be as fast as the required
PCLK.
Lowest power consumption.
Vertical panning in 2-line increments.
Nominal performance.
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.
Typically 20% higher than Default Mode.
Vertical panning in 1-line increments.
Slightly higher performance than Default Mode.
Alternate SwivelView Mode
X26A-G-002-02
SED1374
Page 41