HD66727 Datasheet, PDF (14/97 Pages) Hitachi Semiconductor – Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function

HD66727
Table 3 Pin Functional Description (cont)
Signal
Vci
Number of
Pins
I/O
2
I
V5OUT2 3
O
V5OUT3 2
O
C1, C2
6
—
RESET* 1
I
EXM
1
I
OPOFF 1
I
V_CC dummy 2
0
TEST
1
I
Connected to Function
Power supply
V_EE pin/booster
capacitance
Inputs a reference voltage and supplies power to the
booster; generates the liquid crystal display drive
voltage from the operating voltage.
Vci = 1.0V to 5.0V ≤ V_CC
Voltage input to the Vci pin is boosted twice and output.
When the voltage is boosted three times, the same
capacitance as that of C1–C2 should be connected
here.
V_EE pin
Voltage input to the Vci pin is boosted three times and
output.
Booster
capacitance
External capacitance should be connected here when
using the booster.
MPU or external Reset pin. Initializes the LSI when low. Be sure to input
R-C circuit
this signal after power-on.
MPU
V_CC or GND
External alternating signal used for annunciator display
in the standby mode. If annunciator display is not used,
EXM must be fixed to V_CC or GND.
Turns the internal operational amplifier off when OPOFF
= V_CC, and turns it on when OPOFF = GND. If the
amplifier is turned off (OPOFF = V_CC), V1 to V5 must be
supplied to the V1OUT to V5OUT pins.
Input pad
Outputs V_CC supply level; can fix the input pads to V_CC
level.
GND
Test pin. Must be fixed at GND level.
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