ST7528 데이터 시트보기 (PDF) - Sitronix Technology Co., Ltd.
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ST7528 Datasheet PDF : 97 Pages
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ST7528
PIN DESCRIPTION
POWER SUPPLY
Power Supply Pin Description
Name
I/O
Description
VDD
Supply
Power supply
VSS
Supply
Ground
VSS2
Supply
Ground
VDD2
VOUT_OUT
VOUT_IN
V0
Supply
Supply
Supply
I/O
Power supply
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
V1
The voltage determined by LCD pixel is impedance-converted by an operational amplifier for
V2
application. V1,V2,V3,V4 need the capacitor between with VSS Voltages should have the
V3
following relationship;
V4
V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ VSS
When the internal power circuit is active, these voltages are generated as following table
according to the state of LCD bias.
LCD bias
V1
V2
V3
V4
1/N bias
(N-1) / N x V0 (N-2) / N x V0 (2/N) x V0
(1/N) x V0
NOTE: N = 5 to 12
LCD DRIVER SUPPLY
LCD Driver Supply Pin Description
Name I/O
Description
VR
I
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
REF
I
Selects the external VREF voltage via the VEXT pin
− REF = “H”: using the internal VREF
− REF = “L”: using the external VREF
VEXT
I
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
OSC1 I
External OSC input pin, when using internal clock oscillator, connect OSC1 to VDD.
Ver2.3
16/97
2007/1/3
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