AND791GST Datasheet, PDF (2/3 Pages) List of Unclassifed Manufacturers – 4 Lines x 40 Characters Intelligent Character Display

Connector Pin Assignment
Pin No. Signal
Function
1
DB₇
2
DB₆
3
DB₅
4
DB₄ ^{Data bus line}
DB0-DB7 are for 8-bit operation
5
DB_{3 DB4-DB7 are for 4-bit operation}
6
DB₂
7
DB₁
8
DB₀
9
E₁ Enable (for upper 2 lines)
10
R/W
L: Data write from MPU to LCM. H: Data read
from LCM to MPU
11
RS L: Instruction code input. H: Data input
12
V_O Liquid crystal driving voltage
13
GND Ground
14
V_DD Power supply voltage + 5V
15
E₂ Enable (for lower 2 lines)
16
NC No Connect
Dimensional Outline
AND791GST/GST-LED
Intelligent Character Display
Power Supply
LCD panel is driven by the voltage V_DD–V_O, so an adjustable
V_O is required for contrast control and temperature
compensation.
Temperature Variations
Temperature
0°C
V_DD–V_O
5.00
+25°C
4.75
+50°C
4.50
Power Supply Block Diagram
V_DD
(+5V)
V_DD – V_O
V_O
VR
V_DD
GND
V_DD – V_O = LCD Drive Voltage
VR10 to 20 kΩ
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
4/2/05
Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com
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