Epson S1D13705 technical manual Portrait

Page 38	Epson Research and Development
	Vancouver Design Center

physical memory start address

320

256

A B E

portrait window

CD

240

image seen by programmer = image in display buffer

	E
		B		window	D	240
display			portrait
start
address
	A				C
		320

image refreshed by S1D13705

256

Figure 7-1: Relationship Between the Default Mode Screen Image and the Image Refreshed by S1D13705

From the programmers perspective the memory is laid out as shown on the left. The programmer accesses memory exactly as for a panel of with the dimensions of 240x320 setup to have a 256 pixel horizontal stride. The programmer sees memory addresses increasing from A->B and from B->C.

From a hardware perspective the S1D13705 always refreshes the LCD panel in the order B->D and down to do A->C.

S1D13705	Programming Notes and Examples
X27A-G-002-03	Issue Date: 02/01/22