ST7781
11.1.5 Entry Mode (R03h)
Entry Mode (R03h)
RS
/WR
/RD D15 D14 D13 D12 D11 D10
D9
HWM
0
D8
D7
0
D6
0
D5
I/D1
1
D4
I/D0
1
D3
AM
0
D2
0
D1
0
D0
0
1
↑
1
TRI
0
DFM
0
0
0
BGR
0
0
0
0
0
0
0
0
0
0
0
0
Default value
AM: Sets the DRAM Updata Direction
When AM = “0”, set the horizontal writing direction.
When AM = “1”, set the vertical writing direction.
When a window area is set by registers R50h ~R53h, only the addressed DRAM area is updated based on I/D [1:0]
and AM bits setting.
I/D [1:0]: Control the address counter (AC) to automatically increase or decrease by 1 when update one pixel display
data.
AM
ID[1:0]
Write DRAM Direction
AM
ID[1:0]
Write DRAM Direction
0
00
1
00
0
0
0
01
10
11
1
1
1
01
10
11
Description
Ver. 1.7
46
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
