SED1565 Datasheet, PDF (22/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
PIN DESCRIPTIONS
Power Supply Pins
Pin Name
VDD
VSS
VSS2
VRS
V1, V2,
V3, V4,
V5
I/O
Power
Supply
Power
Supply
Power
Supply
Power
Supply
Power
Supply
Function
Shared with the MPU power supply terminal VCC.
No. of
Pins
13
This is a 0V terminal connected to the system GND.
9
This is the reference power supply for the step-up voltage circuit for the
4
liquid crystal drive.
This is the externally-input VREG power supply for the LCD power supply
2
voltage regulator.
These are only enabled for the models with the VREG external input option.
This is a multi-level power supply for the liquid crystal drive. The voltage
10
applied is determined by the liquid crystal cell, and is changed through the
use of a resistive voltage divided or through changing the impedance using
an op. amp. Voltage levels are determined based on VDD, and must
maintain the relative magnitudes shown below.
VDD (= V0) ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ V5
Master operation: When the power supply turns ON, the internal power
supply circuits produce the V1 to V4 voltages shown below. The voltage
settings are selected using the LCD bias set command.
SED1565*** SED1566*** SED1567*** SED1568*** SED1569***
V1 1/9•V5 1/7•V5 1/8•V5 1/6•V5 1/6•V5 1/5•V5 1/8•V5 1/6•V5 1/8•V5 1/6•V5
V2 2/9•V5 2/7•V5 2/8•V5 2/6•V5 2/6•V5 2/5•V5 2/8•V5 2/6•V5 2/8•V5 2/6•V5
V3 7/9•V5 5/7•V5 6/8•V5 4/6•V5 4/6•V5 3/5•V5 6/8•V5 4/6•V5 6/8•V5 4/6•V5
V4 8/9•V5 6/7•V5 7/8•V5 5/6•V5 5/6•V5 4/5•V5 7/8•V5 5/6•V5 7/6•V5 5/6•V5
LCD Power Supply Circuit Terminals
Pin Name I/O
Function
No. of
Pins
CAP1+
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
the CAP1- terminal.
CAP1–
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
the CAP1+ terminal.
CAP2+
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
the CAP2- terminal.
CAP2–
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
the CAP2+ terminal.
CAP3–
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
the CAP1+ terminal.
VOUT
O DC/DC voltage converter. Connect a capacitor between this terminal and
2
VSS.
VR
I Output voltage regulator terminal. Provides the voltage between VDD and
2
V5 through a resistive voltage divider.
These are only enabled when the V5 voltage regulator internal resistors are
not used (IRS = “L”).
These cannot be used when the V5 voltage regulator internal resistors are
used (IRS = “H”).
8–20
EPSON