ST7533 Sitronix Technology, ST7533 Datasheet - Page 8

• Manufacturer Part Number: ST7533
• Description: 33 x 96 Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7533
P
Power Supply Pins
LCD Power Supply Pins
Ver 1.0
P
I
I
N
Pin Name
Pin Name
N
V1, V2,
V3, V4,
CAP1+
CAP1–
CAP2+
CAP2–
CAP3–
VOUT
VSS2
VDD
VSS
VRS
D
D
VR
V5
E
E
S
S
C
C
Supply
Supply
Supply
Supply
Supply
Power
Power
Power
Power
Power
R
R
I/O
I/O
O
O
O
O
O
O
I
I
I
P
P
T
T
Shared with the MPU power supply terminal Vcc.
This is a 0V terminal connected to the system GND.
This is the reference power supply for the step-up voltage circuit for the
liquid crystal drive.
This is the internal-output VREG power supply for the LCD power supply
voltage regulator.
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
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.
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1- terminal.
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1+ terminal.
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP2- terminal.
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP2+ terminal.
DC/DC voltage converter. Connect a capacitor between this terminal and
the CAP1+ terminal.
DC/DC voltage converter. Connect a capacitor between this terminal and
VSS.
Output voltage regulator terminal. Provides the voltage between VDD and
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 .
I
I
O
O
N
N
S
S
V1
V2
V3
V4
1/6*V5,1/5*V5
2/6*V5,2/5*V5
4/6*V5,3/5*V5
5/6*V5,4/5*V5
1/33 DUTY
8/60
Function
Function
1/6*V5,1/5*V5
2/6*V5,2/5*V5
4/6*V5,3/5*V5
5/6*V5,4/5*V5
1/17 DUTY
No. of Pins
No. of Pins
2003/07/21
12
10
9
2
1
2
2
2
2
2
2
2