ST7528
LCD DRIVER OUTPUTS
LCD Driver Output Pin Description
Name
I/O Description
SEG0
O
to
SEG159
COM0
O
to
COM127
COMS
O
(COMS1)
LCD segment driver outputs
The display data and the M signal control the output voltage of segment driver.
Display data
M (Internal)
Segment driver output voltage
Normal display
Reverse display
H
H
V0
V2
H
L
VSS
V3
L
H
V2
V0
L
L
V3
VSS
Power save mode
VSS
VSS
LCD common driver outputs
The internal scanning data and M signal control the output voltage of common driver.
Scan data
M (Internal)
Common driver output voltage
H
H
VSS
H
L
V0
L
H
V1
L
L
V4
Power save mode
VSS
Common output for the icons
The output signals of two pins are same. When not used, these pins should be left open.
ST7528 I/O PIN ITO Resister Limitation
PIN Name
ITO Resister
PS2,PS1,PS0,REF,OCS1,INTRS,Mode, TA
No Limitation
T0…9 , VR(No used) , VEXT(No used)
Floating
Vdd, Vdd2, Vss, Vss2, VOUT_IN , VOUT_OUT,
<100Ω
VR(used) , VEXT(used)
<500Ω
CSB , E , R/W , A0 , D0 …D7
<1KΩ
V1 , V2 , V3 , V4
<500Ω
RST
<10KΩ
In IIC interface: SDA , SCL ITO resister recommend to less than 100 ohm
Ver2.3
20/97
2007/1/3