ST7541-G データシートの表示（PDF） - Sitronix Technology Co., Ltd.
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ST7541-G Datasheet PDF : 78 Pages
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ST7541
PIN DESCRIPTION
POWER SUPPLY
Name
Type
VDD
Power
VSS
Power
VDD2
Power
VSS2
Power
VOUT_OUT Power
VOUT_IN Power
V0
V1
V2
Power
V3
V4
Description
Digital Power supply
Ground
Analog Power supply
Ground
Internal booster output. Left these pads open when using external power supply.
Short VOUT_OUT with VOUT_IN when using internal booster.
The power supply pads of internal regulator. Apply high voltage here for internal regulator.
If using external booster, VOUT_OUT must be open with internal booster programmed OFF (set
register VC=0).
If using internal booster, short VOUT_OUT with VOUT_IN together.
LCD driver supply voltages. V1, V2, V3, V4 need the capacitor between with VSS.
Voltages should have the following relationship:
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
Name
Type
Description
V0 voltage adjustment pin
VR
I
It is valid only when on-chip resistors are not used (INTRS = "L")
When using internal resistors (INTRS = "H"), open this pin
REF
Selects the external VREF voltage via the VEXT pin
I
REF = “H”: using the internal VREF
REF = “L”: using the external VREF
Externally input reference voltage (VREF) for the internal voltage regulator
VEXT
I
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.
Ver 1.9
10/78
2007/9/3
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