ST7548T Datasheet, PDF (30/50 Pages) Sitronix Technology Co., Ltd. – 66 x 102 Dot Matrix LCD Controller/Driver

ST7548T
H= “1”
Display configuration
Top/bottom row mode set data order
A0 WR(R/W) D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
1
DO
X
X
Flag
Description
DO=0:MSB is on top
DO _{DO=1:LSB is on top}
See page 22
System Bias
Select LCD bias ratio of the voltage required for driving the LCD.
A0 WR(R/W) D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
1
0
BS2
BS1
BS0
BS2
BS1
BS0
Bias
Recommend Duty
0
0
0
11
1:100
0
0
1
10
1:81
0
1
0
9
1:65/1:68
0
1
1
8
1:49
1
0
0
7
1/40:1/36
1
0
1
6
1/24
1
1
0
5
1:18/1:16
1
1
1
4
1:10/1:9/1:8
Set V0 voltage (Set V_OP)
A0 WR(R/W) D7
D6
D5
D4
0
0
1
VOP6
VOP5
VOP4
The operation voltage V0 (VOP) can be set by software.
D3
VOP3
D2
VOP2
D1
VOP1
D0
VOP0
V0=( a + VOP×b )
(1)
The maximum voltage that can be generated is depending on the VDD1 voltage and the display load current. Two
overlapping V0 ranges are selectable via the command “Set V0 Range”. For the LOW (PRS=0) range a=a1 and for the
HIGH (PRS=1) range a=a2 with steps equal to “b” in both ranges. Note that the charge pump is turned off if VOP [6;0]
and the bit PRS are all set to zero
Ver 1.2
30/50
2006/03/16