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Epson Research and Development
Page 11
Vancouver Design Center
LCD Panel Options / Memory Requirements
SED1352
Issue Date: 98/10/08
X16-AN-005-07
3.2.2 Register settings
AUX[00h] = 0000 0000
not in test mode
AUX[01h] = 1001 000x
4-bit single panel, 4 gray shades, 16-bit display memory interface
AUX[02h] = 0100 1111
horizontal resolution = 640 ; 4 gray shades = 4 pixels per byte ; 8 pixels per fetch
AUX[03h] = 0000 0000
not in power save modes
AUX[04h] = 1110 1111
total 240 scan lines
AUX[05h] = 0000 0000
WF = 0
AUX[06h] = 0000 0000
AUX[07h] = 0000 0000
default starting address at 0000h (with AUX[06h])
AUX[08h] = xxxx xxxx
don,t care when not using split screen
AUX[09h] = xxxx xxxx
don,t care when not using split screen
AUX[0Ah] = 1110 1111
together with AUX[0Bh] bit1-0, should be the same as or larger than AUX[05h] bit1-0 and
AUX[0Bh] = xxxx xx00
AUX[04h] when not using split screen
AUX[0Dh] = 0000 0000
no virtual screen
Example setting of Look-up Table when using bank# 2 for display:
AUX[0Eh] = 10xx 1000
index = 8
AUX[0Fh] = xxxx 0000
gray = 0
AUX[0Eh] = 10xx 1001
index = 9
AUX[0Fh] = xxxx 0101
gray = 5
AUX[0Eh] = 10xx 1010
index = A
AUX[0Fh] = xxxx 1010
gray = A
AUX[0Eh] = 10xx 1011
index = B
AUX[0Fh] = xxxx 1111
gray = F
x = don’t care
Note
When LCDENB (bit 4 of AUX[01h]) is used to control the LCD power, the following sequence is recommeded to
setup the AUX registers of the SED1352:
1.
Write to bit 4 of AUX[01h] with value ’0’.
2.
Setup the AUX registers accordingly.
3.
Delay at least half a second (depend on panel type, it may be required more time delay).
4.
Write to bit 4 of AUX[01h] with value ’1’.