ST7571 Sitronix Technology, ST7571 Datasheet - Page 14

• Manufacturer Part Number: ST7571
• Description: 4 Gray Scale Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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PS[2:0], OCS1, VEXT, DCPS, MF[2:0], DS[1:0]
VDD1, VDD2, VDD3, VSS1, VSS2, VSS3, VPP, VD1I, VD1O
CSB , ERD, RWR, A0, DB[7:0], VE
V0, VG, VM, XV0, VD1
RST
ST7571
6.5 LCD DRIVER OUTPUTS
LCD Driver Output Pin Description
Recommend I/O Resistance
Note:
1.
2.
3.
4.
5.
6.
Ver 1.5a
COM127
SEG127
COMS2
COMS1
COM0
Name
SEG0
to
to
These Limitations include the bottleneck of ITO layout.
Keep the ITO resistance of COM0 ~ COM127 be equal, and so it is of SEG0 ~ SEG127.
If using I
(if the system pull up resistor is 4.7KΩ).
If LCD panel size is larger than 1.5”, the resistance limitations will be lower.
To avoid the noise in different power system affect other power system, please separate different power source on
ITO layout. Please refer to the ITO Layout Reference.
The V0, XV0 and VG power circuits have output pins, input pins and a sensor input. To avoid the power noise affects
the sensor of the power circuits. The trace should be separated by ITO and should be connected together by FPC.
2
C interface mode, the resistance of SDA signal is recommended to be lower than 300Ω
I/O
O
O
O
LCD segment driver outputs. The display data and frame signal control the output .
LCD common driver outputs. The internal scan signal and frame signal control the output voltage.
Common output for the icons.
The outputs at COMS1 and COMS2 are the same. When not used, these pins should be left open.
Display Data
Display off / Power save mode
Display off / Power save mode
Scan Signal
H
H
L
L
PIN Name
H
H
L
L
Negative
Negative
14/76
Positive
Positive
Frame
Negative
Negative
Positive
Positive
Frame
Description
Normal Display
Segment Driver Output Voltage
Common Driver Output Voltage
VSS
VSS
VSS
VG
VG
VSS
XV0
VM
VM
V0
ITO Resister
Reverse Display
<100Ω
<500Ω
<10KΩ
<5KΩ
<1KΩ
VSS
VSS
VSS
VG
VG
2009/7/21