ST7556 Sitronix Technology, ST7556 Datasheet - Page 14
![no-image](/images/no-image-200.jpg)
ST7556
Manufacturer Part Number
ST7556
Description
65 x 102 Dot Matrix LCD Controller/Driver
Manufacturer
Sitronix Technology
Datasheet
1.ST7556.pdf
(43 pages)
- Current page: 14 of 43
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ST7556
Test Pin
ST7556 I/O PIN ITO Resister Limitation
PIN Name
PS,IMS,OSC
T1~T8, VRS
VDD, Vdd2, Vss1, Vss2 , Vlcdin , Vlcdout
V1 , V2 , V3 , V4
A0,/WR,/RD,CSB, D0 …D7
RESB
Ver 2.2
V0,V1, V2, V3, V4
Test0~Test11
Reserve Pin
V
V
LCDOUT
VRS
LCDIN
Supply
Supply
Supply
Supply
Supply
Power
Power
Power
Power
T
If the internal voltage generator is used, the V
connected together and series one capacitor to VSS2.
If an external supply is used this pin must be left open.
If the internal voltage generator is used, the V
connected together. An external supply voltage can be supplied using
the V
case, VLCDOUT has to be left open,
This is a multi-level power supply for the liquid crystal.
V
Monitor Voltage Regulator level, must be left open.
To test used.
Test0~Test8 must floating
Test9 could be connected out for monitor the VLCD(V0) voltage
Test10 must connect to VSS
Test11 must connect to VDD
ALL Reserve Pin must floating
LCDIN
LCDIN
≥V0 ≥V1≥V2≥V3≥V4≥VSS
pad. This pad is for external multiple voltage input. In this
14/43
LCDIN
LCDIN
No Limitation
Floating
<100Ω
<500Ω
<1KΩ
<10KΩ
& V
& V
LCDOUT
LCDOUT
ITO Resister
must be
must be
2005/10/05
11
6
6
8
1
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