ST7565 查看數據表（PDF） - Unspecified
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ST7565 Datasheet PDF : 56 Pages
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ST7565
PIN DESCRIPTIONS
Power Supply Pins
Pin Name I/O
Function
No. of Pins
VDD
Power
Supply
Shared with the MPU power supply terminal Vcc.
13
VSS
Power
Supply
This is a 0V terminal connected to the system GND.
9
VSS2
Power This is the reference power supply for the step-up voltage circuit for the
Supply liquid crystal drive.
4
VRS
Power
Supply
This is the externally-input VREG power supply for the LCD power supply
voltage regulator.
These are only enabled for the models with the VREG external input option.
2
Power This is a multi-level power supply for the liquid crystal drive. The voltage
Supply 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
V1, V2,
V3, V4,
V5
Power
Supply
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
10
LCD bias set command.
1/65 DUTY 1/49 DUTY 1/33 DUTY 1/55 DUTY 1/53 DUTY
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 7/8*V5,5/6*V5
LCD Power Supply Pins
Pin Name I/O
Function
CAP1+
CAP1–
CAP2+
CAP2–
CAP3–
VOUT
VR
O
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1- terminal.
O
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1+ terminal.
O
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP2- terminal.
O
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP2+ terminal.
O
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1+ terminal.
O
DC/DC voltage converter. Connect a capacitor between this terminal and
VSS.
Output voltage regulator terminal. Provides the voltage between VDD and
I
V5 through a resistive voltage divider.
IRS = “L” : the V5 voltage regulator internal resistors are not used .
IRS = “H” : the V5 voltage regulator internal resistors are used .
No. of Pins
2
2
2
2
2
2
2
Ver 1.0a
8/56
2002/06/24
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