HD66766R Datasheet, PDF (25/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
Table 16 Operating clock frequency of the Booster 1 and 2
DC2 DC1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
DC0
Operating clock frequency in
the booster 1
Operating clock frequency in the voltage
inverting circuit and the booster 2
0
32-divided clock
32-divided clock
1
64-divided clock
32-divided clock
0
32-divided clock
64-divided clock
1
64-divided clock
64-divided clock
0
32-divided clock
96-divided clock
1
64-divided clock
96-divided clock
0
32-divided clock
128-divided clock
1
64-divided clock
128-divided clock
Operation of voltage inverting circuit
Table 17
BT3
VCL output of the voltage inverting circuit
(Set VCL no lower than –22.0V.)
0
Halt boosting
1 Output voltage between VCH and VM by inverting
Set activation of voltage inverting circuit with output of the booster 2 stable. *See the Power-on/off
Sequence section.
DB 15 Contrast Control (R04h)
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
W 1 0 0 0 0 0 VR2 VR1 VR0 0 CT6 CT5 CT4 CT3 CT2 CT1 CT0
Figure 10 Contrast Control Instruction
CT6–0: These bits control the LCD drive voltage to adjust 128-step contrast.
Table 18 Contrast control
CT6 CT5 CT4 CT3 CT2 CT1 CT0 Contrast
0
0
0
0
0
0
0 1.016R (Minimum)
0
0
0
0
0
0
1 1.008R
0
0
0
0
0
1
0 1.000R
0
0
0
0
0
1
1 0.992R
0
0
0
0
1
0
0 0.984R
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
1
1
1
1
1
1
0 0.008R
1
1
1
1
1
1
1 0.000R (Maximum)
25