ST7565P Datasheet, PDF (47/71 Pages) Sitronix Technology Co., Ltd. – 65 x 132 Dot Matrix LCD Controller/Driver

ST7565P
Power Controller Set
This command sets the power supply circuit functions. See the function explanation in “The Power Supply Circuit,” for details.
E R/W
A0 /RD /WR
0 10
D7 D6 D5 D4 D3 D2 D1 D0
Selected Mode
0 0 1 01 0
Booster circuit: OFF
1
Booster circuit: ON
0
Voltage regulator circuit: OFF
1
Voltage regulator circuit: ON
0 Voltage follower circuit: OFF
1 Voltage follower circuit: ON
V0 Voltage Regulator Internal Resistor Ratio Set
This command sets the V0 voltage regulator internal resistor ratio. For details, see the function explanation is “The Voltage
Regulator circuit " and Table 11.
E R/W
A0 /RD /WR
0 10
D7 D6 D5 D4 D3 D2 D1 D0
0 0 1 0 00 0 0
001
010
↓
111
111
Rb/Ra Ratio
Small
↓
Large
The Electronic Volume (Double Byte Command)
This command makes it possible to adjust the brightness of the liquid crystal display by controlling the LCD drive voltage V0
through the output from the voltage regulator circuits of the internal liquid crystal power supply. This command is a two byte
command used as a pair with the electronic volume mode set command and the electronic volume register set command, and
both commands must be issued one after the other.
The Electronic Volume Mode Set
When this command is input, the electronic volume register set command becomes enabled. Once the electronic volume mode
has been set, no other command except for the electronic volume register command can be used. Once the electronic volume
register set command has been used to set data into the register, then the electronic volume mode is released.
E R/W
A0 /RD /WR
0 10
D7 D6 D5 D4 D3 D2 D1 D0
1 0 0 00 0 01
Ver 2.1b
47/71
2009/09/14