ST7571 Sitronix Technology, ST7571 Datasheet - Page 11

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

www.DataSheet4U.com
ST7571
6.3 SYSTEM CONTROL
System Control Pin Description
Notes:
1.
2.
3.
Ver 1.5a
MF[2:0]
DS[1:0]
Name
DCPS
VEXT
OSC1
CSEL
VD1O
VD1I
VPP
VE
When system control pin set to “H”, it should be connected to VDD1.
When system control pin set to “L”, it should be connected to VSS1.
CSEL function is illustrated as the figure below:
I/O
O
O
I
I
I
I
I
I
I
Reserved for testing, must set with floating.
Connect OSC1 to VDD1.
This pin selects the supply voltage source of the digital circuit.
If system VDD1 is 3.0V ~ 3.3V, set DCPS=L to select Internal Regulator as digital circuit power.
If system VDD1 is 1.8V ~ 2.8V, set DCPS=H to select VDD1 as digital circuit power.
Select COM output sequence.
Fix CSEL=H to enable “Interlace” mode (recommended).
In interlace mode, COM2n (even number) is in the one side, COM(2n+1) (odd number) is in the
opposite side.
Short VD1I with VD1O externally by ITO or FPC.
VD1I is the power supply pin of the internal digital circuits.
When DCPS=L, VD1O is the output of the internal digital power regulator.
When DCPS=H, VD1O is provided by VDD1.
When writing EEPROM, VE should be pull-high externally.
When writing EEPROM, it needs external power supply voltage.
Reserve for testing only, recommend setting to [ MF2,MF1,MF0 = 0,0,0 ].
Reserve for testing only, recommend setting to [ DS1,DS0 = 0,0 ].
COM127
COM125
COM5
COM3
COM1
Gold Bump Face Up
CSEL=“H”
11/76
Description
COM126
COM124
COM4
COM2
COM0
2009/7/21