HD66717 Datasheet, PDF (10/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Table 1 Pin Functional Description (cont)
Signal
COM1 to
COM32
SEG1 to
SEG60
ACOM
ASEG1 to
ASEG10
V2/V3
V1OUT to
V5OUT
VREFP,
VREF,
VREFM
Number
Device
of Pins I/O Interfaced with Function
32
O LCD
60
O LCD
1
O LCD
10
O LCD
Common output signals for character display: COM1 to
COM8 for the first line, COM9 to COM16 for the second
line, COM17 to COM24 for the third line, and COM25 to
COM32 for the fourth line. All the unused pins output
deselection waveforms. During sleep mode (SLP= 1) or
standby mode (STB = 1), all pins output V_CC level.
Segment output signals for segment icon display and
character display. During sleep mode (SLP = 1) or standby
mode (STB = 1), all pins output V_CC level.
Common output signal for annunciator display; can drive
display statically between V_CC and AGND levels; outputs
V_CC level while annunciator display is turned off (DA = 0).
Segment output signals for annunciator display; can drive
display statically between V_CC and AGND levels; output V_CC
level while annunciator display is turned off (DA = 0).
2
I
Open or
V2/V3 are voltage levels for the internal operational
Short-circuited amplifiers; can drive LCD with 1/4 bias when V2 and V3
are short-circuited and with 1/6 bias when they are left
disconnected.
5
I or O —
Used for output from the internal operational amplifiers
when they are used (OPOFF = GND); when amplifiers'
driving capability is insufficient, attach a capacitor to
stabilize the output. Especially these capacitors for V1OUT
and V4OUT must be attached in 1/26 duty and 1/34 duty.
When the amplifiers are not used (OPOFF = V_CC); V1 to V5
voltages can be supplied to these pins externally.
3
I
Open or
Adjusts the driving capability of the internal operational
Short-circuited amplifiers according to the LCD power supply voltage.
LCD Power Supply
Voltage (V_CC–V_EE)
V_CC–V_EE: 3V–5V
V_CC–V_EE: 4V–6V
V_CC–V_EE: 5V–8V
V_CC–V_EE: 7V or more
Pin Settings VREF,
VREFP, and VREFM
Only VREF and VREFP shorted
All pins open
All pins shorted
Only VREF and VREFM shorted
V_EE
2
V_CC/GND 10
AGND
2
OSC1/
2
OSC2
— Power supply GND power supply for LCD drive
V_CC–V_EE = 13V max.
— Power supply V_CC: +2.4V to +5.5V, GND (logic): 0V
— Power supply Low level power supply for annunciator display; can adjust
contrast of annunciators; AGND ³ GND.
— Oscillation
For R-C oscillation, connect an external resistor
resistor/clock For external clock supply, input clock pulses to OSC1.
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