ST8012 datasheet(29/47 Pages) SITRONIX

29 / 47 page

ST8012

V1.6

29/47

2004/09/08

COMMANDS

The ST8012 identify the data bus signals by a combination of XCS, SDI, and SCLK signals.

LCD Bias Set

This command selects the voltage bias ratio required for the liquid crystal display.

The D3 can select the Frame direction , if select ‘0’ is normal else select ‘1’ is reverse.

Select Status

1/120duty 1/112duty

1/96duty

1/80duty

1/64duty

1/48duty

1/32duty

1/11 bias 1/11 bias 1/10 bias

1/9 bias

1/7 bias

1/6 bias

1/9 bias

1/8 bias

1/7 bias

1/5 bias

1/11 bias 1/11 bias 1/10 bias

1/9 bias

1/7 bias

1/6 bias

1/9 bias

1/8 bias

1/7 bias

1/5 bias

Power Controller Set

This command sets the power supply circuit functions. See the function explanation in “The Power Supply Circuit,”

for details

Selected Mode

Booster circuit: OFF

Booster 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 7 .

Rb/Ra Ratio

↓

Small

↓

Large

The Electronic Volume

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.

Electronic Volume Register Set

By using this command to set six bits of data to the electronic volume register, the liquid crystal drive voltage V5

assumes one of the 64 voltage levels. When this command is input, the electronic volume mode is released after the

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