LC75817E Datasheet, PDF (18/43 Pages) Sanyo Semicon Device – 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function

LC75817E, 75817W
• Set display contrast ... <Sets the display contrast>
Code
D48 D49 D50 D51 D52 D53 D54 D55 D56 D57 D58 D59 D60 D61 D62 D63
CT0 CT1 CT2 CT3
X
X
X
X
CTC
X
X
X
1
0
0
0
X: don’t care
CT0 to CT3: Display contrast setting (11 steps)
CT0
0
1
0
1
0
1
0
1
0
1
0
CT1
0
0
1
1
0
0
1
1
0
0
1
CT2
0
0
0
0
1
1
1
1
0
0
0
CT3
0
0
0
0
0
0
0
0
1
1
1
LCD drive 4/4 bias voltage supply V_LCD0 level
0.94 V_LCD = V_LCD – (0.03 V_LCD × 2)
0.91 V_LCD = V_LCD – (0.03 V_LCD × 3)
0.88 V_LCD = V_LCD – (0.03 V_LCD × 4)
0.85 V_LCD = V_LCD – (0.03 V_LCD × 5)
0.82 V_LCD = V_LCD – (0.03 V_LCD × 6)
0.79 V_LCD = V_LCD – (0.03 V_LCD × 7)
0.76 V_LCD = V_LCD – (0.03 V_LCD × 8)
0.73 V_LCD = V_LCD – (0.03 V_LCD × 9)
0.70 V_LCD = V_LCD – (0.03 V_LCD × 10)
0.67 V_LCD = V_LCD – (0.03 V_LCD × 11)
0.64 V_LCD = V_LCD – (0.03 V_LCD × 12)
CTC: Display contrast adjustment circuit state setting
CTC
0
1
Display contrast adjustment circuit state
The display contrast adjustment circuit is disabled, and the V_LCD0 pin level is forced to the V_LCD level.
The display contrast adjustment circuit operates, and the display contrast is adjusted.
Note that although the display contrast can be adjusted by operating the built-in display contrast adjustment circuit, it is also
possible to apply fine adjustments to the contrast by connecting an external variable resistor to the V_LCD4 pin and modifying
the V_LCD4 pin voltage. However, the following conditions must be met: (V_LCD0 – V_LCD4) ≥ 4.5 V, and 1.5 V ≥ V_LCD4 ≥ 0 V.
No. 6144-18/43