HD66760 Datasheet, PDF (9/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Table 1 Pin Functional Description (cont)
Number
Signals of Pins I/O Connected to Functions
COM1– 80
COM80
O
LCD
Output signals for common drive: All the unused pins
output unselected waveforms. In the display-off period
(D1-0 = 00, 01), sleep mode (SLP = 1), or standby
mode (STB = 1), all pins output GND level.
The CMS bit can change the shift direction of the
common signal. For example, if CMS = 0, COM1 shifts
to COM80. If CMS = 1, COM80 shifts to COM1.
Note that the start position of the common output is
shifted by screen-division driving.
SEG1– 312
SEG312
O
LCD
Output signals for segment drive. In the display-off
period (D1-0 = 00, 01), sleep mode (SLP = 1), or
standby mode (STB = 1), all pins output GND level.
The SGS bit can change the shift direction of the
segment signal. For example, if SGS = 0, RAM
address 0000 is output from SEG1. If SGS = 1, it is
output from SEG312.
SEG1, SEG4, ... display red (R), SEG2, SEG5, ...
display green (G), and SEG3, SEG6, ... display blue
(B) (SGS = 0).
V1OUT– 5
V5OUT
V_LPS
1
I/O Capacitor
Used for output from the internal operational amplifiers
when they are used (OPOFF = GND); attach a
capacitor to stabilize the output. When the amplifiers
are not used (OPOFF = V_CC), V1 to V5 voltages can
be supplied to these pins from outside. Adjust the
contrast for V1OUT ≥ V_CC, V_Ci.
—
Power supply Power supply for LCD drive. V_LCD (= V_LPS – GND) =
15.5 V max.
V_CC, GND 1
OSC1,
2
OSC2
— Power supply Power supply for logic circuit
I
Oscillation- Connect an external resistor for R-C oscillation.
resistor
Vci
1
I
Power supply Inputs a reference voltage and supplies power to the
step-up circuit; generates the liquid crystal display
drive voltage from the operating voltage. The step-up
output voltage must not be larger than the absolute
maximum ratings.
Must be left disconnected when the step-up circuit is
not used.
VLOUT 1
O
V_LPS pin/step- Potential difference between Vci and GND is three- to
up capacitance six-times-stepped up and then output. Magnitude of
step-up is selected by instruction.
C1+, C1– 2
— Step-up
External capacitance should be connected here for
capacitance step-up.
C2+, C2– 2
— Step-up
External capacitance should be connected here for
capacitance step-up.
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