ST7628
9.1.32 VSCSAD: Vertical Scroll Start Address of RAM (37h)
Command
A0
0
/RD /WR
D7
0
D6
D5
D4
D3
D2
D1
D0
Hex
0
1
1
0
1
1
1
(37h)
1
1
0
0
VSCSAD
-
SSA6 SSA5 SSA4 SSA3 SSA2 SSA1 SSA0
1
Parameter
NOTE: “-“ Don’t care
Description
This command is used together with Vertical Scrolling Definition (33h). These two commands
describe the scrolling area and the scrolling mode.
The Vertical Scrolling Start Address command has one parameter which describes which line in
the Frame Memory will be written as the first line after the last line of the Top Fixed Area on the
display as illustrated below:
This command Start the scrolling.
Exit from V-scrolling mode by commands Partial mode On (12h) or Normal mode On (13h).
NOTE: When new Pointer position and Picture Data are sent, the result on the display will
happen at the next Panel Scan to avoid tearing effect.
SSA refers to the Frame Memory line Pointer
Restriction
Since the value of the Vertical Scrolling Start Address is absolute (with reference to the Frame
Memory), it must not enter the fixed area (defined by Vertical Scrolling Definition
(33h)-otherwise undesirable image will be displayed on the Panel.
SSA [6:0] is based on line unit.
SSA [6:0] = 00h, 01h, 02h, 03h, … , 45h
Ver 1.4
132/213
2008/08
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
