HD66760 Datasheet, PDF (22/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
During no display, when AP1-0 = 00, the current consumption can be reduced by ending the operational
amplifier and step-up circuit operation.
SLP: When SLP = 1, the HD66760 enters the sleep mode, where the internal display operations are halted
except for the R-C oscillator, thus reducing current consumption. For details, see the Sleep Mode section.
Only the following instructions can be executed during the sleep mode.
a. Power control (BS2-0, BT1-0, DC1-0, AP1-0, SLP, and STB bits)
b. Software reset (RST = 1)
During the sleep mode, the other GRAM data and instructions cannot be updated although they are retained.
STB: When STB = 1, the HD66760 enters the standby mode, where display operation completely stops,
halting all the internal operations including the internal R-C oscillator. Further, no external clock pulses are
supplied. For details, see the Standby Mode section.
Only the following instructions can be executed during the standby mode.
a. Standby mode cancel (STB = 0)
b. Start oscillation
c. Power control (BS2-0, BT1-0, DC1-0, AP1-0, SLP, and STB bits)
During the standby mode, the GRAM data and instructions may be lost. To prevent this, they must be set
again after the standby mode is canceled.
Table 12 BS Bits and LCD Drive Bias Value
BS2
BS1
BS0
LCD Drive Bias Value
0
0
0
Setting disabled
0
0
1
1/10 bias drive
0
1
0
1/9 bias drive
0
1
1
1/8 bias drive
1
0
0
1/7 bias drive
1
0
1
1/6 bias drive
1
1
0
1/5 bias drive
1
1
1
1/4 bias drive