ST7578
5. PINNING DESCRIPTIONS
LCD Driver Output Pins
Pin Name
Type
Description
No. of Pins
LCD segment driver outputs.
The display data and the frame control the output voltage.
Segment driver output voltage
Display data
Frame
Normal display
Reverse display
H
H
L
+
-
VG
VSS
VSS
VG
VSS
VG
SEG0 to SEG101
O
102
+
-
VG
L
VSS
VSS
Display OFF, Power Save
VSS
LCD common driver outputs.
The internal scanning signal and the frame control the output voltage.
Common driver output voltage
Scan signal
Frame
Normal display
Reverse display
XV0
H
H
L
+
-
COM0 to COM64
O
65
V0
VM
VM
VSS
+
-
L
Display OFF, Power Save
LCD common driver outputs for icons.
COMS1,COMS2
(COMS)
O
The output signals of these two pins are the same.
2
When icon feature is not used, these pins should be left open.
Microprocessor Interface Pins
Pin Name
Type
Description
No. of Pins
Microprocessor interface select pins.
PS2
“L”
PS1
“L”
PS0
“L”
Selected Interface
4 Pin-SPI MPU interface
PS[2:0]
I
3
“H”
“L”
“L”
“L”
3 Pin-SPI MPU interface
“H”
“H”
“L”
8080-series parallel MPU interface
6800-series parallel MPU interface
“H”
“L”
Chip select input pin.
CSB
I
I
Interface access is enabled when CSB is “L”.
1
1
When CSB is non-active (CSB=“H”), D[7:0] pins are high impedance.
Reset input pin.
RESB
When RESB is “L”, internal initialization is executed.
It determines whether the access is related to data or command.
A0=“H” : Indicates that D[7:0] are display data.
A0=“L” : Indicates that D[7:0] are control data.
A0
I
1
A0 is not used in 3-Line SPI interface and should fix to “H” by VDD1.
Ver 1.2
14/52
2007/04/30
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
