ST7558
5. PINNING DESCRIPTIONS
Pin Name
I/O
Description
No. of Pins
Lcd driver outputs
LCD segment driver outputs
This display data and the M signal control the output voltage of segment
driver.
Segment driver output voltage
Normal display Reverse display
Display data M (Internal)
H
H
VLCD
V2
SEG0 to SEG101
102
O
H
L
L
L
H
L
VSS
V2
V3
V3
VLCD
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 driver output voltage
Normal display Reverse display
Display data M(Internal)
COM0 to COM64
65
O
O
H
H
L
H
L
H
L
VSS
VLCD
V1
V4
VSS
L
Power save mode
Common output for the icons
The output signals of two pins are same. When not used, this pin should
be left open.
COMS
2
1
MICROPROCESSOR INTERFACE
Microprocessor interface select input pin
P/S= " H “: parallel data input.
P/S= " L “: serial data input.
When P/S=" L ",D0 to D5 are fixed to " H ".
RD (E) and WR(R/W) are fixed to " H ".
I
I
P/S
IMS
Input mode select
P/S
" H "
" H "
" L "
" L "
IMS
State
1
" H " 6800-series parallel MPU interface
" L " 8080-series parallel MPU interface
" H " 4 Pin-SPI MPU interface
I2C interface
" L "
Chip select input pins
Data/instruction I/O is enabled only when CSB is " L ". When chip select
is non-active, DB0 to DB7 is high impedance.
When CSB pin in two line interface, this pin should fix to ” H”
Reset input pin
When RESET is " L ", initialization is executed.
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.
A0 pin in I2C interface, this pin should fix to ” H”
I
I
I
2
1
2
CSB
RESB
A0
Ver 2.3
12/56
2005/10/05
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
