ST7528 Sitronix, ST7528 Datasheet - Page 16

• Manufacturer Part Number: ST7528
• Description: 16 Gray Scale Dot Matrix LCD Controller
• Manufacturer: Sitronix

ST7528
PIN DESCRIPTION
POWER SUPPLY
VOUT_OUT
LCD DRIVER SUPPLY
Name
VR
REF
VEXT
OSC1
Ver2.3
VOUT_IN
Name
VDD2
VSS2
VDD
VSS
V0
V1
V2
V3
V4
I/O
I
I
I
I
Supply
Supply
Supply
Supply
Supply
Supply
I/O
I/O
Description
V0 voltage adjustment pin
It is valid only when on-chip resistors are not used (INTRS = "L")
When using internal resistors (INTRS = "H"), open this pin
Selects the external VREF voltage via the VEXT pin
Externally input reference voltage (VREF) for the internal voltage regulator
It is valid only when REF is "L"
When using internal voltage regulator, this pin must be open
External OSC input pin, when using internal clock oscillator, connect OSC1 to VDD.
REF = “H”: using the internal VREF
REF = “L”: using the external VREF
If the internal Vout voltage generator is used, the VOUT_IN & VOUT_OUT must be connected
together. If an external supply is used, this pin must be left open.
An external Vout supply voltage can be supplied using the VOUT_IN pad. In this case,
VOUT_OUT has to be left open, and the internal voltage generator has to be programmed to zero.
(SET register VC=0)
LCD driver supply voltages
The voltage determined by LCD pixel is impedance-converted by an operational amplifier for
application. V1,V2,V3,V4 need the capacitor between with VSS Voltages should have the
following relationship;
V0
When the internal power circuit is active, these voltages are generated as following table
according to the state of LCD bias.
NOTE: N = 5 to 12
LCD bias
1/N bias
V1
V2
LCD Driver Supply Pin Description
Power Supply Pin Description
V3
V4
V1
(N-1) / N x V0
VSS
16/97
www.DataSheet.co.kr
V2
(N-2) / N x V0
Power supply
Power supply
Description
Ground
Ground
V3
(2/N) x V0
V4
(1/N) x V0
2007/1/3
Datasheet pdf - http://www.DataSheet4U.net/