Specifications

3–6 EPSON Rev. 1.1
S1D12205 Series
5. PIN DESCRIPTION
Power Supply Pins
Notes: Two VSS pins are provided. As they are commonly connected inside the IC, an input into any VSS can be used
if power impedance is LOW. To have the enough noise resistance, however, the V
SS power input from each
pin is recommended.
LCD Power Pins
LED Drive Terminal
Pin Name I/O Description No. of Pins
V
DD Power supply
Connects to the logic power supply. This is common to the Vcc power pin of
1
the MPU.
VSS Power supply 0V power pin connected to system ground (GND) 2
V
1, V3
Power supply
Multi-level LCD drive power supplies. A capacitor is required for external
4
V4, V5 stabilization.
V
S1 O
Output pin of oscillator (OSC) power voltage. Do not connect any external
1
load to this pin.
Pin Name I/O Description No. of Pins
V
REG2 O
Output pins of LCD voltage and amp source power supplies.
1
A capacitor is required for stabilization.
OCA
OCB
OCC O A voltage capacitor pin. A capacitor is required for amplification. 5
OCD
OCE
Pin Name I/O Description No. of Pins
LE1
O
An Nch open drain output terminal to drive the LED.
2
LE2 Connects to the LED cathode.