ST7689-G4 View Datasheet(PDF) - Sitronix Technology Co., Ltd.
Part Name
Description
MFG CO.
ST7689-G4
Sitronix Technology Co., Ltd.
'ST7689-G4' PDF : 195 Pages View PDF
6.2. LCD Power Supply Pins
ST7689
Name
V0OUT
V0IN
V0S
XV0OUT
XV0IN
XV0S
VgOUT
VgIN
VgS
Vm
I/O
Description
Positive LCD driver supply voltages.
V0OUT is the output voltage of V0 generated by ST7689.
I/O
V0IN is the input pin of power supply to generate V0 voltage for LCD.
V0S is the input pin of power supply to sense the V0 voltage.
V0OUT, V0IN & V0S should be connected together in FPC.
Negative LCD driver supply voltages.
XV0OUT is the output voltage of XV0 generated by ST7689.
I/O
XV0IN is the input pin of power supply to generate XV0 voltage for LCD.
XV0S is the input pin of power supply to sense the XV0 voltage.
XV0OUT, XV0IN & XV0S should be connected together in FPC.
Bias LCD driver supply voltages.
VgOUT is the output voltage of Vg generated by ST7689.
VgIN is the input pin of power supply to generate Vg voltage for LCD.
VgS is the input pin of power supply to sense the Vg voltage.
VgOUT, VgIN & VgS should be connected together in FPC.
Vm is the I/O pin of LCD bias supply voltage.
Voltages should have the following relationship;
V0≧ Vg ≧ Vm ≧ VSS ≧ XV0
VDDA-0.7V>Vm>0.7V
I/O
VDDA≧2.5V: (2xVDDA)-0.6V≧Vg ≧1.8V
VDDA< 2.5V: (2xVDDA)-0.6V≧Vg ≧2.5V
When the internal power circuit is active, these voltages are generated as following table according
to the state of LCD bias.
VD1out
VD1in
LCD bias
1/N bias
Vg
(2/N) x V0
NOTE: N = 9,10,11,12,13 and 14
Voltage regulator for digital circuit.
VD1out is voltage output from regulator circuit.
I/O
VD1in is voltage input to digital circuit.
VD1in and VD1out should be connected together by FPC.
Vm
(1/N) x V0
Version 1.0
Page 23 of 195
2009/10
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