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ST7531 Datasheet(PDF) 13 Page - Sitronix Technology Co., Ltd.

Part # ST7531
Description  65K Color Dot Matrix LCD Controller/Driver
PDF  85 Pages
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Manufacturer  SITRONIX [Sitronix Technology Co., Ltd.]
Direct Link  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7531 Datasheet(HTML) 13 Page - Sitronix Technology Co., Ltd.

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ST7531
Ver 1.8
13/85
2006/9/18
7. PIN DESCRIPTION
7.1 POWER SUPPLY
Name
I/O
Description
VDD
Supply Power supply for logic circuit
VDD1 Supply Power supply for OSC circuit
VDD2 Supply Power supply for Booster Circuit
VDD3
VDD4
VDD5
Supply Power supply for LCD
VSS
VSS1
VSS4
Supply Ground. Ground system should be connected together.
VLCDOUT Supply
If the internal voltage generator is used, the VLCDIN & VLCDOUT must be connected together.
If an external supply is used, this pin must be left open.
VLCDIN Supply
An external LCD supply voltage can be supplied using the VLCDIN pad. In this case, VLCDOUT has to be left
open, and the internal voltage generator has to be programmed to zero. (SET register VB=0)
V0In
V0out
V1
V2
V3
V4
Supply
LCD driver supply voltages
V0In & V0out should be connected together in FPC area.
Voltages should have the following relationship:
V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ VSS
When the internal power circuit is active, these voltages are generated as the 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 14
7.2 LCD DRIVER SUPPLY
Name
I/O
Description
VREF
O
Reference voltage output for monitor only. Leave it open.
CLS
I
When using internal clock oscillator, connect CLS to VDD.
When using external clock oscillator, connect CLS to VSS.
CL
I/O
When using internal clock oscillator, it is the output of oscillator.
When using external clock oscillator, it is the input of oscillator.
7.3 SYSTEM CONTROL
Name
I/O
Description
TCAP
O
Test pin. Leave it open.
T
[0]~T[10]
---
Test pin. Leave it open.



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