ST7577 Datasheet, PDF (8/48 Pages) Sitronix Technology Co., Ltd. – 132 x 39 Dot Matrix LCD Controller/Driver

ST7577
6. PIN DESCRIPTION
Pin Name
I/O
Description
LCD DRIVER OUTPUTS
LCD segment driver outputs.
This display data and the M signal control the output voltage of segment
driver.
Segment drover output voltage
Display data Frame
Normal display Reverse display
SEG0…SEG131
O
H
+
VG
VSS
H
-
VSS
VG
L
+
VSS
VG
L
-
VG
VSS
Power save mode
VSS
VSS
LCD column driver outputs.
This internal scanning data and M signal control the output voltage of
common driver.
Common drover output voltage
Display data Frame
Normal display Reverse display
COM0…COM38
O
H
+
XV0
H
-
V0
L
+
VM
L
-
VM
Power save mode
VSS
MICROPROCESSOR INTERFACE
Microprocessor interface select input pin.
PS0…PS2
PS2
PS1
PS0
State
“L”
“L”
“L”
I
“H”
“L”
“L”
4 Pin-SPI MPU interface
3 Pin-SPI MPU interface
“L”
“H”
“L”
8080-series parallel MPU interface
“H”
“H”
“L”
6800-series parallel MPU interface
CSB_A
(for Port-A)
CSB_B
(for Port-B)
Chip select input pins.
Data/instruction I/O is enabled only when CSB is “L”. When chip select is
I
non-active, D0 to D7 is high impedance.
* MODE pin will select one of two CSB pins. The unused one should be
left floating.
RESB
Reset input pin.
I
When RESB is “L”, initialization is executed.
A0_A
(for Port-A)
A0_B
(for Port-B)
It determines whether the data bits are data or a command.
A0=“H”: Indicates that D0 to D7 are display data.
A0=“L”: Indicates that D0 to D7 are control data.
I
When in 3-line SPI interface, left it connected to VDD.
* MODE pin will select one of two A0 pins. The unused one should be left
floating.
Pin
Count
132
39
3
1*
1*
1
1*
1*
Ver 1.0a
8/48
2008/02/14