Datasheet

DEP 256064C-Y Production Specification
Version: 3 PAGE: 5
2. Interface Pin Function
Pin
Number
Symbol
I/O
Function
Power Supply
26
VCI
P
Power Supply for Operation
This is a voltage supply pin. It must be connected to
external source & always be equal to or higher than VDD
& VDDIO.
25
VDD
P
Power Supply for Core Logic Circuit
This is a voltage supply pin. It can be supplied externally (within
the range of 2.4~2.6V) or regulated internally from VCI. A
capacitor should be connected between this pin & VSS under
all circumstances.
24
VDDIO
P
Power Supply for I/O Pin
This pin is a power supply pin of I/O buffer. It should be
connected to VDD or external source. All I/O signal should have
VIH reference to VDDIO. When I/O signal pins (BS0~BS1,
D0~D7, control signals…) pull high, they should be connected
to VDDIO.
2
VSS
P
Ground of Logic Circuit
This is a ground pin. It also acts as a reference for the logic
pins. It must be connected to external ground.
3,29
VCC
P
Power Supply for OLED Panel
These are the most positive voltage supply pin of the chip. They
must be connected to external source.
5,28
VLSS
P
Ground of Analog Circuit
These are the analog ground pins. They should be connected
to VSS externally.
Driver
22
IREF
I
Current Reference for Brightness Adjustment
This pin is segment current reference pin. A resistor should be
connected between this pin and VSS. Set the current lower
than 10uA.
4
VCOMH
P
Voltage Output High Level for COM Signal
This pin is the input pin for the voltage output high level for
COM signals. A tantalum capacitor should be connected
between this pin and VSS.
27
VSL
P
Voltage Output Low Level for SEG Signal
This is segment voltage reference pin.
When external VSL is not used, this pin should be left open.
When external VSL is used, this pin should connect with
resistor and diode to ground.