Epson S1D13705 User Manual

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Epson Research and Development

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Vancouver Design Center

Programming Notes and Examples

S1D13705

Issue Date: 02/01/22

X27A-G-002-03

Screen 2 Start Address Registers

These three registers form the seventeen bit Screen 2 Start Address. Screen 2 is always
displayed immediately following the screen 1 data and will begin at the left-most pixel on
a line. Keep in mind that if the Screen 1 Vertical Size is equal to or greater than the physical
display then Screen 2 will not be shown.

In landscape mode these registers form the word offset to the first byte in display memory
to be displayed. Changing these registers by one will shift the display image 2 to 16 pixels,
depending on the current color depth.

The S1D13705 does not support split screen operation in portrait mode. Screen 2 will never
be used if portrait mode is selected.

Refer to Table 5-1: “Number of Pixels Panned Using Start Address” to see the minimum
number of pixels affected by a change of one to these registers

Screen 1 Start Address registers, REG[0C], REG[0D] and REG[10] are discussed in
Section 5.2.1 on page 28

REG[0Eh] Screen 2 Display Start Address 0 (LSB)

Start Addr Bit

REG[0Fh] Screen 2 Display Start Address 1 (MSB)

Start Addr Bit