RA8835A Datasheet, PDF (24/88 Pages) RAIO Technology Inc. – DOT MATRIX LCD CONTROLLER SPECIFICATION

Version 1.0
RA8835A
Dot Matrix LCD Controller
6-3-2-2 SL1, SL2
SL1 and SL2 set the number of lines per scrolling screen. The number of lines is SL1 or SL2 plus
one. The relationship between SAD, SL and the display mode is described below.
Table-12: Text Display Mode
W/S
Screen
First Layer
Second Layer
First screen block
SAD1
SAD2
Second screen block
SL1
SL2
SAD3 (see note 1)
Third screen block (partitioned screen) Set both SL1 and SL2 to L/F + 1 if not
using a partitioned screen.
Screen configuration example:
SAD2
0
SAD1
SL1
Character display page 1
SAD3
Character display page 3
SL2
Graphics display page 2
Layer 2
Layer 1
Upper screen
SAD1
SL1
Lower screen
SAD3
(See note 2)
Set both SL1 and SL2 to ((L/F) / 2 + 1)
Screen configuration example:
SAD2
SL2
SAD4
(See note 2)
SAD2
1
SAD1
SL1
Character display page 1
SAD3
Character display page 3
Graphics display page 2
Graphics display page 4
(SAD4)
Layer 1
Layer 2
Notes:
1. SAD3 has the same value as either SAD1 or SAD2, whichever has the least number of
lines (set by SL1 and SL2).
2. Since the parameters corresponding to SL3 and SL4 are fixed by L/F, they do not have to
be set in this mode.
RAiO TECHNOLOGY INC.
24/88
www.raio.com.tw