Epson S1D13705 5.2.1 Registers

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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 n/a n/a n/a n/a n/a 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
116 16 8 8
28 8 4 4
44 4 2 2
82 2 1 1