ST7628
9.1.28 SCRLAR: Scroll Area (33h)
Command
A0
0
/RD /WR
D7
D6
D5
D4
D3
D2
D1
D0
Hex
0
-
0
1
1
0
0
1
1
(33h)
1
1
1
1
0
0
0
0
SCRLAR
TFA6 TFA5 TFA4 TFA3 TFA2 TFA1 TFA0
VSA6 VSA5 VSA4 VSA3 VSA2 VSA1 VSA0
BFA6 BFA5 BFA4 BFA3 BFA2 BFA1 BFA0
-
-
-
1
1
2
3
st parameter
nd parameter
rd parameter
-
1
-
1
NOTE: “-“ Don’t care
Descriptio
n
This command just defines the Vertical Scrolling Area of the display and not performs vertical scroll.
When MADCTR BL=0
The 1st parameter TFA [6:0] describes the Top Fixed Area (in No. of lines from Top of the Frame
Memory and Display).
The 2nd parameter VSA [6:0] describes the height of the Vertical Scrolling Area (in No. of lines of the
Frame Memory [not the display] from the Vertical Scrolling Start Address) The first line appears
immediately after the bottom most line of the Top Fixed Area.
The 3rd parameter BFA [6:0] describes the Bottom Fixed Area (in No. of lines from Bottom of the
Frame Memory and Display).
TFA, VSA and BFA refer to the Frame Memory Line Pointer.
Restriction The condition is (TFA+VSA+BFA) = 70, otherwise Scrolling mode is undefined.
In Vertical Scroll Mode, MADCTR parameter MV should be set to ‘0’-this only affects the Frame
Memory Write.
TFA[6:0], VSA[6:0] and BFA[6:0] is based on line unit.
TFA[6:0]= 00h, 01h, 02h, 03h, … , 46h
VSA[6:0]= 00h, 01h, 02h, 03h, … , 46h
BFA[6:0]= 00h, 01h, 02h, 03h, … , 46h
Ver 1.4
123/213
2008/08
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
