ST7571 Sitronix Technology, ST7571 Datasheet - Page 39

• Manufacturer Part Number: ST7571
• Description: 4 Gray Scale Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7571
9.1.11 Set N-line Inversion (recommended 12-line inversion for full duty, 1/129 duty)
This 2-byte instruction sets the inverted line number within range of 3 to 33 to improve the display quality by controlling the
phase of the internal Frame signal. The DC bias maybe occurred if the N-line is not set well. Be sure to confirm this factor
after choosing a value of N.
The 1
The 2
Ver 1.5a
N4
A0
A0
0
0
0
0
0
1
1
1
0
0
:
st
nd
Instruction
Instruction
R/W
R/W
N3
0
0
0
0
1
1
1
1
:
0
0
DB7
DB7
N2
0
0
0
0
0
1
1
1
:
0
x
DB6
DB6
N1
Fig. 24 Sequence for N-line Inversion
0
0
1
1
1
0
1
1
:
1
x
DB5
DB5
N0
0
1
0
1
0
1
0
1
:
0
x
39/76
DB4
DB4
N4
0
0-line inversion (frame inversion)
DB3
DB3
N3
Selected n-line inversion
1
31-line inversion
32-line inversion
33-line inversion
12-line inversion
3-line inversion
4-line inversion
5-line inversion
DB2
DB2
N2
1
:
:
DB1
DB1
N1
x
(Recommend)
2009/7/21
DB0
DB0
N0
x