ST7571 Sitronix Technology, ST7571 Datasheet - Page 41

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

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ST7571
9.1.15 Power Control
This instruction selects one of eight power circuit functions by using 3-bit register. An external power supply and part of
internal power supply functions can be used simultaneously.
9.1.16 Select Regulator Resister
This instruction selects resistance ratio of the internal regulator resistors. Refer to the voltage regulator circuits in power
supply circuit section.
Ver 1.5a
A0
A0
0
0
VC
0
1
R2
0
0
0
0
1
1
1
1
R/W
R/W
0
0
VR
0
1
DB7
DB7
0
0
VF
0
1
R1
0
0
1
1
0
0
1
1
DB6
DB6
0
0
Internal Power Supply Circuits
Internal voltage converter circuit
Internal voltage regulator circuit
Internal voltage follower circuit
DB5
DB5
1
1
41/76
R0
DB4
DB4
0
1
0
1
0
1
0
1
0
0
DB3
DB3
1
0
1+ (Rb / Ra)
DB2
DB2
VC
R2
2.3
3.0
3.7
4.4
5.1
5.8
6.5
7.2
Status
OFF
OFF
OFF
ON
ON
ON
DB1
DB1
VR
R1
2009/7/21
DB0
DB0
VF
R0