1 registers, Registers – Epson S1D13705 User Manual

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Epson Research and Development

Vancouver Design Center

S1D13705

Programming Notes and Examples

X27A-G-002-03

Issue Date: 02/01/22

5.2.1 Registers

Screen 1 Start Address Registers

These three registers form the seventeen bit screen 1 start address. Screen 1 is displayed
starting at the top left corner of the display.

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

In portrait mode these registers form the offset to the display memory byte where screen 1
will start displaying. Changing these registers in portrait mode will result in a shift of 1 to
8 pixels depending on the color depth.

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

REG[0Ch] Screen 1 Display Start Address 0 (LSB)

Start Addr

Bit 7

Start Addr

Bit 6

Start Addr

Bit 5

Start Addr

Bit 4

Start Addr

Bit 3

Start Addr

Bit 2

Start Addr

Bit 1

Start Addr

Bit 0

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

Start Addr

Bit 15

Start Addr

Bit 14

Start Addr

Bit 13

Start Addr

Bit 12

Start Addr

Bit 11

Start Addr

Bit 10

Start Addr

Bit 9

Start Addr

Bit 8

REG[10h] Screen 1 Display Start Address 2 (MSB)

n/a

Start Addr

Bit 16

Table 5-1: Number of Pixels Panned Using Start Address

Color Depth (bpp)

Pixels per Word

Landscape Mode

Number of Pixels Panned

Pixels Per Byte

Portrait Mode

Number of Pixels Panned