ST7573
6. PIN DESCRIPTION
Pin Name
I/O
Description
Pin
Count
LCD DRIVER OUTPUTS
LCD segment driver outputs.
This display data and the M signal control the output voltage of segment
driver.
Display data
SEG0…SEG131
O
H
H
L
L
Frame
+
-
+
-
Segment driver output voltage
Normal display
VG
V
SS
V
SS
VG
V
SS
Reverse display
V
SS
VG
VG
V
SS
V
SS
132
Power save mode
LCD column driver outputs.
This internal scanning data and M signal control the output voltage of
common driver.
Display data
COM0…COM31
O
H
H
L
L
Frame
+
-
+
-
Common driver output voltage
Normal display
XV0
V0
VM
VM
V
SS
2
Reverse display
32
Power save mode
COMS1…COMS2
O
When not used, this pin should be floating.
Microprocessor interface select input pin.
PS2
PS0…PS2
I
“L”
“H”
“L”
“H”
CSB
I
PS1
“L”
“L”
“H”
“H”
PS0
“L”
“L”
“L”
“L”
Common output for the icon. The output signals of two pins are the same.
MICROPROCESSOR INTERFACE
State
4 Pin-SPI MPU interface
3 Pin-SPI MPU interface
8080-series parallel MPU interface
6800-series parallel MPU interface
1
3
Chip select input pins.
Data/instruction I/O is enabled only when CSB is “L”. When chip select is
non-active, D0 to D7 is high impedance.
RESB
I
Reset input pin.
When RESB is “L”, initialization is executed.
It determines whether the data bits are data or a command.
A0
I
A0=“H”: Indicates that D0 to D7 are display data.
A0=“L”: Indicates that D0 to D7 are control data.
When in 3-line SPI interface, left it connected to V
DD
.
1
1
Ver 1.0b
7/46
2007/07/12
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
